CN207193380U - Titanium-aluminium alloy part with compisite seeping layer, the titanium-aluminium alloy part with diamond coatings - Google Patents
Titanium-aluminium alloy part with compisite seeping layer, the titanium-aluminium alloy part with diamond coatings Download PDFInfo
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- CN207193380U CN207193380U CN201720959125.6U CN201720959125U CN207193380U CN 207193380 U CN207193380 U CN 207193380U CN 201720959125 U CN201720959125 U CN 201720959125U CN 207193380 U CN207193380 U CN 207193380U
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Abstract
The utility model provides a kind of titanium-aluminium alloy part with compisite seeping layer, including titanium-aluminium alloy matrix, and the compisite seeping layer being arranged on the titanium-aluminium alloy matrix；The compisite seeping layer includes the TiAl being cascading2Layer, the Ti for mixing zirconium5Si4Layer, the TiSi for mixing zirconium2Layer, through-thickness are gradually reduced from the titanium-aluminium alloy matrix to the compisite seeping layer, the thermal coefficient of expansion of the compisite seeping layer.When subsequently preparing diamond coatings on the basis of the compisite seeping layer, the compisite seeping layer can improve the adhesiveness of diamond coatings and titanium-aluminium alloy matrix, improve the problem of titanium-aluminium alloy is not wear-resistant, improve service life of the diamond coatings on titanium-aluminium alloy part.
Description
Technical field
The coating technology field of titanium-aluminium alloy is the utility model is related to, more particularly to a kind of titanium aluminium with compisite seeping layer
Alloy components, the titanium-aluminium alloy part with diamond coatings.
Background technology
Titanium-aluminium alloy has the advantages that low density, specific strength and specific stiffness are high, high temperature creep property is good, it is considered to be great
One of novel light structural timber of application prospect.But its coefficient of friction is high, wears no resistance, holds in actual use
It is easy to wear so as to reducing its service life.The fretting damages such as fretting wear have turned into the limitation wide variety of main bottle of titanium-aluminium alloy
One of neck.
Diamond thin is because with the characteristic such as hardness is high, wearability is strong, coefficient of friction is relatively low, thermal conductivity is high at present, and normal
It is used to prepare wear-resistant coating.The good diamond thin of one layer of adhesive force can be greatly enhanced micro-moving frictional wear military service ring
The service life of mechanical component under border.But titanium-aluminium alloy differs larger with the thermal coefficient of expansion of diamond thin, thin diamond
Film titanium-aluminium alloy surface deposit after, during cooling, can because thermal coefficient of expansion difference it is larger produce thermal stress so as to
Cause to form crackle between the poor adhesiveness between diamond thin and matrix, titanium-aluminium alloy and diamond thin, in stress
Even the phenomenon that diamond thin comes off occurs in the place of concentration.
(CN104760349A) has in the prior art is prepared for resisting using the method for glow ion percolation on titanium-aluminium alloy surface
High-temperature oxydation and heat and corrosion resistant Al-Cr coatings, the preparation cost of one, Al-Cr coatings is larger, and two, prepared Al-Cr is applied
The thermal coefficient of expansion of layer and diamond thin still has larger gap, is not suitable for doing the intermediate layer of diamond thin and titanium-aluminium alloy.
Therefore, it is necessary to provide it is a kind of suitable for titanium-aluminium alloy matrix and can effectively improve titanium-aluminium alloy matrix and diamond thin
Between adhesiveness novel transition layer.
Utility model content
In consideration of it, the utility model provides a kind of titanium-aluminium alloy part with compisite seeping layer and with diamond coatings
Titanium-aluminium alloy part, during solving subsequently to prepare diamond coatings on the basis of the compisite seeping layer, solve existing diamond and apply
The problem of layer is with titanium-aluminium alloy matrix adhesiveness deficiency, so as to be effectively improved the problem of titanium-aluminium alloy is not wear-resistant, can also be improved
Service life of the diamond coatings on titanium-aluminium alloy part.
In a first aspect, the utility model provides a kind of titanium-aluminium alloy part with compisite seeping layer, including titanium-aluminium alloy base
Body, and the compisite seeping layer being arranged on the titanium-aluminium alloy matrix；The compisite seeping layer includes the TiAl being cascading2
Layer, the Ti for mixing zirconium5Si4Layer, the TiSi for mixing zirconium2Layer, through-thickness is from the titanium-aluminium alloy matrix to the compisite seeping layer, institute
Stating the thermal coefficient of expansion of compisite seeping layer gradually reduces.
Wherein, the thermal coefficient of expansion of the compisite seeping layer is by (9.0-9.5) × 10-6/ DEG C be gradually decrease to (3.0-4.0) ×
10-6/℃。
Wherein, the thickness of the compisite seeping layer is 35-50 μm.
Wherein, the TiAl2The thickness of layer is 12-26 μm.
Wherein, the Ti5Si4The thickness of layer is 8-12 μm；The TiSi2The thickness of layer is 9-15 μm.
Wherein, the compisite seeping layer also includes Ti-Al diffusion layers, and the Ti-Al diffusion layers are located at titanium aluminium conjunction
Auri body and the TiAl2Between layer.
Wherein, the thickness of the Ti-Al diffusion layers is 3-10 μm.
Wherein, through-thickness is from the titanium-aluminium alloy matrix to the compisite seeping layer, in the Ti-Al diffusion layers
The atomic ratio of aluminium and titanium is by 1:1 is gradually increased to 2:1.
Wherein, the percentage composition of doping of the zr element in the compisite seeping layer is that (atom is dense by 2at.%-5at.%
Degree).
The titanium-aluminium alloy part with compisite seeping layer that the application first aspect provides, it on titanium-aluminium alloy matrix by setting
Put toughness it is larger include TiAl2- mix the Ti of zirconium5Si4- mix the TiSi of zirconium2This compisite seeping layer so that from titanium-aluminium alloy base
Body surface is towards on the thickness direction of the compisite seeping layer, the thermal expansion coefficient in gradient change of the compisite seeping layer, be gradually decrease to
Diamond thin is closer to, and when being easy to subsequently prepare diamond coatings on the basis of the compisite seeping layer, can effectively reduce gold
Thermal stress in diamond thin film, improve the adhesiveness between diamond coatings and titanium-aluminium alloy matrix, improve titanium-aluminium alloy intolerant to
The problem of abrasion, improve service life of the diamond coatings on titanium-aluminium alloy part.
Second aspect, this application provides a kind of titanium-aluminium alloy part with diamond coatings, including titanium-aluminium alloy matrix,
And compisite seeping layer and diamond coatings on the titanium-aluminium alloy matrix are set in turn in, wherein, the compisite seeping layer is as originally
Apply described in first aspect.
The titanium-aluminium alloy part with diamond coatings that the application second aspect provides, by first on titanium-aluminium alloy matrix
Set compisite seeping layer that then diamond coatings are set as intermediate layer, the presence of the compisite seeping layer causes whole on titanium-aluminium alloy
The modulus of elasticity and thermal coefficient of expansion of body coating can graded, effective reductions between titanium-aluminium alloy matrix and diamond coatings
Thermal stress in diamond thin, the adhesiveness between diamond coatings and titanium-aluminium alloy matrix is improved, improve titanium-aluminium alloy not
Anti abrasive problem, improve service life of the diamond coatings on titanium-aluminium alloy part.
The advantages of the utility model, will partly illustrate in the following description, and a part is aobvious and easy according to specification
See, or can be known by the implementation of the utility model embodiment.
Brief description of the drawings
Fig. 1 is the cross section structure schematic diagram of the titanium-aluminium alloy part in the embodiment of the present application 1 with compisite seeping layer.
Fig. 2 is the backscattering section shape appearance figure of the titanium-aluminium alloy part in the embodiment of the present application 2 with compisite seeping layer.
Fig. 3 be the embodiment of the present application 3 in have compisite seeping layer titanium-aluminium alloy part appearance structure characterization result, (a)
For backscattering section pattern, (b) is the cross sectional elements distribution map of compisite seeping layer, and (c), (d) are the X of each Rotating fields of compisite seeping layer
X ray diffraction (XRD) material phase analysis figure.
Embodiment
As described below is the preferred embodiment of the embodiment of the present application, it is noted that for the common skill of the art
For art personnel, on the premise of the embodiment of the present application principle is not departed from, some improvements and modifications can also be made, these improvement
The protection domain of the embodiment of the present application is also considered as with retouching.
In a first aspect, this application provides a kind of titanium-aluminium alloy part with compisite seeping layer, including titanium-aluminium alloy matrix, with
And it is arranged at the compisite seeping layer on the titanium-aluminium alloy matrix；The compisite seeping layer includes the TiAl being cascading2Layer, mix
The Ti of zirconium5Si4Layer, the TiSi for mixing zirconium2Layer, through-thickness are described compound from the titanium-aluminium alloy matrix to the compisite seeping layer
The thermal coefficient of expansion of infiltration layer gradually reduces.
In the application, the thermal coefficient of expansion of the compisite seeping layer is gradually decrease to close with diamond coatings.That is, it is compound
Outermost layer-TiSi of infiltration layer2The thermal coefficient of expansion of layer and diamond coatings approaches.
Alternatively, through-thickness is from the titanium-aluminium alloy matrix to the compisite seeping layer, the compisite seeping layer it is hot swollen
Swollen coefficient is by (9.0-9.5) × 10-6/ DEG C it is gradually decrease to (3.0-4.0) × 10-6/℃.It is further preferred that the composite cementation
The thermal coefficient of expansion of layer is by 9.2 × 10-6/ DEG C it is gradually decrease to 3.5 × 10-6/℃。
In the compisite seeping layer of the application, hardness and the equal distribution gradient of thermal coefficient of expansion, the compisite seeping layer also have
The toughness and hardness of graded, the later stage when preparing diamond coatings under hot conditions on the compisite seeping layer, the composite cementation
Thermal stress-cracking caused by layer can effectively alleviate the coefficient of expansion between diamond thin and titanium-aluminium alloy matrix, effectively improves gold
Adhesiveness between diamond thin film and matrix.
In the application, the thickness of the compisite seeping layer is 35-50 μm.Such as it can be 40,45 or 50 μm.
Suitable compisite seeping layer thickness, later stage when preparing diamond coatings on the compisite seeping layer, advantageously form good
Intermediate layer, make the thermal coefficient of expansion of the coating between titanium-aluminium alloy matrix and the thermal coefficient of expansion of diamond coatings
Even ground graded, so as to reduce the shearing stress peak value of diamond coatings, improve the adhesiveness of diamond coatings and matrix.
Further, in the compisite seeping layer, the TiAl2The thickness of layer is 12-26 μm, such as can be 21,22,24
Or 25 μm.The Ti for mixing zirconium5Si4The thickness of layer is 8-12 μm, such as can be 8,9,10,11 or 12 μm.The zirconium mixed
TiSi2The thickness of layer is 9-15 μm, such as can be 9,10,11,12,13 or 14 μm.
In the embodiment of the application one, the thickness of the compisite seeping layer is 45 μm；Wherein, the TiAl2The thickness of layer
For 24 μm；The Ti for mixing zirconium5Si4The thickness of layer is 9 μm；The TiSi for mixing zirconium2The thickness of layer is 12 μm.
In another embodiment of the application, the thickness of the compisite seeping layer is 50 μm；Wherein, the TiAl2The thickness of layer
Spend for 26 μm；The Ti for mixing zirconium5Si4The thickness of layer is 10 μm；The TiSi for mixing zirconium2The thickness of layer is 14 μm.
In the compisite seeping layer of the application, TiAl2Grain size is about hundreds of nanometers, can be specifically that 400-700 receives
Rice；Mix the Ti of zirconium5Si4Grain size is hundreds of nanometers, can be specifically 200-300 nanometers；Mix the TiSi of zirconium2Grain size is
Hundreds of nanometers, can be specifically 200-300 nanometers.
Preferably, the titanium-aluminium alloy matrix and the TiAl2Between layer, it is mutual that the compisite seeping layer also includes a Ti-Al
Diffusion layer.
Preferably, the thickness of the diffusion layer is 3-10 μm.
Further, through-thickness is from the titanium-aluminium alloy matrix to the compisite seeping layer, in the diffusion layer
The atomic ratio of aluminium and titanium is by 1:1 is gradually increased to 2:1.
Alternatively, the zr element is evenly distributed on the Ti in the compisite seeping layer5Si4Layer and TiSi2In layer.
Further, the percentage composition of doping of the zr element in the compisite seeping layer is that (atom is dense by 2at.%-5at.%
Degree).
Alternatively, in the compisite seeping layer, the percentage composition of element silicon (Si) is 38at.%-60at.%.
The titanium-aluminium alloy part with compisite seeping layer that the application first aspect provides, it on hard alloy substrate by setting
Put toughness it is larger include TiAl2- mix the Ti of zirconium5Si4- mix the TiSi of zirconium2This compisite seeping layer so that from titanium-aluminium alloy base
Body surface the thermal expansion coefficient in gradient change of the compisite seeping layer, is gradually decrease to towards on composite cementation thickness direction layer by layer
It is closer to diamond thin, when being easy to subsequently prepare diamond coatings on the basis of the compisite seeping layer, can effectively reduces
Thermal stress in diamond thin, the adhesiveness between diamond coatings and titanium-aluminium alloy matrix is improved, improve titanium-aluminium alloy not
Anti abrasive problem, improve service life of the diamond coatings on titanium-aluminium alloy part.
The titanium-aluminium alloy part with compisite seeping layer that the application first aspect provides, following methods can be used to prepare：
Titanium-aluminium alloy matrix is taken, surface preparation is carried out to it；
Configure penetration enhancer：Silica flour, zirconium oxide, catalyst are well mixed with alumina powder, obtain penetration enhancer；The penetration enhancer includes
The each component of following mass fraction：5-20% silica flours, 0.5-5% zirconium oxides, 5-15% catalyst, surplus are alumina powder；Its
In, the catalyst is sodium fluoride；
Gained penetration enhancer is placed in ball mill and ground, is dried afterwards；Penetration enhancer after drying is loaded into crucible, and by the table
In the pretreated titanium-aluminium alloy matrix embedment penetration enhancer in face, then the crucible equipped with matrix is capped and sealed, is placed in heat treatment
In stove, under air atmosphere, the heat-treatment furnace is warming up to 800-1050 DEG C with 2-5 DEG C/min speed, insulation 2-10 is small
When after be cooled to room temperature, obtain the alloy components after pack cementation；
The alloy components after the pack cementation are taken out, is sequentially placed into deionized water, alcohol and is cleaned by ultrasonic, had after drying
There is the titanium-aluminium alloy part of compisite seeping layer.
In the application, the surface preparation includes：
A, using sand paper polishing titanium-aluminium alloy matrix, and it is cleaned by ultrasonic after polishing using deionized water；
B, corrosion treatment 10s-2min is carried out to the titanium-aluminium alloy matrix after polishing using corrosive liquid, then using deionization
Water is cleaned by ultrasonic, wherein, the corrosive liquid is that volume ratio is 1:The concentrated sulfuric acid of (5-12) and the mixed solution of hydrogen peroxide.
Preferably, in step a, the polishing is to use mesh number to be polished successively for the sand paper of 800-1500 mesh.That is, adopt successively
Polished with the sand paper that mesh number is 800 mesh, 1000 mesh, 1200 mesh and 1500 mesh.
Preferably, in the corrosive liquid, the volume ratio of the concentrated sulfuric acid and hydrogen peroxide is 1:10.
Penetration enhancer used is by silica flour, zirconium oxide, catalyst and the Al of the pure rank of analysis of specific proportioning2O3Powder forms, its
In, silica flour, zirconium oxide provide respectively is oozed Si elements, zr element, Al2O3Powder is filler.Filler Al2O3Powder is mainly to institute
The each component for stating penetration enhancer plays peptizaiton, particularly avoids Si etc. and is sintered into ceramic phase in subsequent high temperature processing, influences sample
Take out.Catalyst mainly enables Si elements and zirconium to penetrate into TiAl alloy matrix.Under under the conditions of the high-temperature heat treatment, penetration enhancer
Each component between can chemically react, generate siliceous fluorine compounds (i.e. SiF4) gas and the fluoride gas containing zirconium
(ZrF3), gas transport is reduced to titanium-aluminium alloy matrix surface and to form active silicon atom and active zirconium atom, and finally with
Chemical reaction and diffusion occur for matrix, and generation includes TiAl2- mix the Ti of zirconium5Si4- mix the TiSi of zirconium2Compisite seeping layer.More
Specifically, in the event of high temperatures, titanium-aluminium alloy matrix is in metastable state, the higher Ti elements of activity from matrix to external diffusion,
And the Si and zirconium restored in the penetration enhancer with inwardly spreading reacts to form the TiSi for mixing zirconium2Outer layer and the Ti for mixing zirconium5Si4It is secondary outer
Layer.Because the Ti elements in TiAl alloy matrix are consumed, the relative rise of Al content forms TiAl2Layer, and the layer is close to and mixed
The Ti of zirconium5Si4Secondary outer layer.
Preferably, the titanium-aluminium alloy matrix and the TiAl2Between layer, in addition to diffusion layer.Further, along thickness
Direction is spent from the titanium-aluminium alloy matrix to the compisite seeping layer, and the atomic ratio of aluminium and titanium in the diffusion layer is by 1:1 by
Cumulative greatly 2:1.Wherein, in the diffusion layer, aluminium is combined with titanium elements with metallic bond.
In penetration enhancer used herein, one, it is not necessary to add Al powder and provide and penetrate into element, it is possible in titanium-aluminium alloy matrix
On the infiltration layer containing aluminium is prepared, to realize that the gradient to the thermal coefficient of expansion of compisite seeping layer is adjusted；Two, zirconium oxide adds
Add, can not only play a part of adjusting Zr and Si elements and penetrate into matrix speed, and the doping of zr element can improve it is described multiple
The toughness of infiltration layer is closed, prevents it because of thermal stress-cracking.Zr2O3, which is not only acted as, changes the work that Zr and Si elements penetrate into matrix speed
With, and the doping of Zr elements can improve the toughness in gradient intermediate layer, prevent the effect of thermal stress-cracking.
Preferably, in the penetration enhancer, the mass fraction of silica flour is 10-20%.
Preferably, in the penetration enhancer, the mass fraction of catalyst is 8-15%.
Preferably, granularity≤800nm of the silica flour, more preferably 200-300nm.
Preferably, granularity≤800nm of the zirconium oxide, more preferably 200-300nm.
Preferably, in the penetration enhancer, granularity >=1 micron of alumina powder, more preferably 2-5 μm.
Preferably, the time of the grinding is 1-3 hours.It can so ensure that each composition powder of penetration enhancer is well mixed.
In the application, the sealing is to use Ludox and aluminum oxide (Al to the crucible after capping2O3) mixture enter
OK, and in 80-120 DEG C of drying box solidify, wherein, the mass ratio of Ludox and aluminum oxide is 1：(1-1.2).Preferably,
The mass ratio of Ludox and aluminum oxide is 1：1.The ratio of Ludox and aluminum oxide must be strict controlled in this application claims model
Enclose, can so ensure that they will not ftracture in high-temperature heat treatment process, preferable sealing function is played to crucible, with
Without carrying out the heat treatment of sample under vacuum condition.
In the embodiment of the application one, the heat-treatment furnace is Muffle furnace or high temperature resistance furnace.
Preferably, it is 2-5 DEG C/min the heat-treatment furnace to be warming up into 800-1050 DEG C of heating rate.
In the application, the holding temperature of the heat-treatment furnace is 800-1050 DEG C.Preferably 800-1000 DEG C.
Preferably, the cooldown rate of the heat-treatment furnace is 5-15 DEG C/sec.More preferably 10 DEG C/sec.
Second aspect, this application provides a kind of titanium-aluminium alloy part with diamond coatings, including titanium-aluminium alloy matrix,
And compisite seeping layer and diamond coatings on the titanium-aluminium alloy matrix are set in turn in, the compisite seeping layer includes layer successively
The folded TiAl set2Layer, the Ti for mixing zirconium5Si4Layer, the TiSi for mixing zirconium2Layer, through-thickness is from the titanium-aluminium alloy matrix to institute
Compisite seeping layer is stated, the thermal coefficient of expansion of the compisite seeping layer gradually reduces.
Further, the thermal coefficient of expansion of the compisite seeping layer is gradually decrease to close with diamond coatings.
Preferably, the titanium-aluminium alloy matrix and the TiAl2Between layer, the compisite seeping layer also includes a counterdiffusion
Layer.Preferably, the thickness of the diffusion layer is 3-10 μm.Further, through-thickness from the titanium-aluminium alloy matrix to
The compisite seeping layer, the atomic ratio of aluminium and titanium in the diffusion layer is by 1:1 is gradually increased to 2:1.
In the application, the Ti in the compisite seeping layer5Si4Layer and TiSi2In layer, also doped with zr element.Further,
The percentage composition of doping of the zr element in the compisite seeping layer is 2at.%-5at.% (atomic concentration).
In the application, the thickness of the diamond coatings is 2-10 μm, 3-5 μm of preferred scope.The diamond coatings
Diamond crystalses are nanometer or micron level.The size of diamond crystalses is Nano grade or micron level (i.e. 1-5 microns), is had
Body can be 10-80 nanometers, 1-4 microns.
When diamond crystalses are Nano grade in diamond coatings, its coefficient of friction can reach less than 0.1, to assign
Give the more preferable anti-wear performance of titanium-aluminium alloy part.Diamond crystalses are preferably less than 10nm, more preferably 2-8nm.
As described above, the thickness of the compisite seeping layer is 35-50 μm.The compisite seeping layer of suitable thickness, be advantageous in titanium aluminium
Good intermediate layer is served as between alloy substrate and diamond coatings so that the modulus of elasticity of Bulk coat and thermal expansion system
Number can between matrix and diamond coatings graded, so as to reduce the shearing stress peak value of diamond coatings, improve diamond
The adhesiveness of coating and titanium-aluminium alloy matrix.
Preferably, in order that diamond coatings obtain more preferable adhesiveness, the thickness of the diamond coatings is described multiple
Close alloying layer thickness 0.05-0.1 times, i.e. the thickness of the compisite seeping layer is 10-20 times of the thickness of the diamond coatings.
The titanium-aluminium alloy part with diamond coatings that the application second aspect provides, by first on titanium-aluminium alloy matrix
Compisite seeping layer is set as intermediate layer, then diamond coatings are set, wherein the compisite seeping layer includes being cascading
TiAl2The Ti of layer, doping zirconium5Si4The TiSi of layer, doping zirconium2Layer, and through-thickness is from titanium-aluminium alloy matrix to composite cementation
Layer, the thermal coefficient of expansion of the compisite seeping layer gradually reduce, and this enables the modulus of elasticity of Bulk coat and thermal coefficient of expansion to exist
Graded between titanium-aluminium alloy matrix and diamond coatings, the thermal stress in diamond thin is effectively reduced, improves diamond
Adhesiveness between coating and titanium-aluminium alloy matrix, improve the problem of titanium-aluminium alloy is not wear-resistant, improve diamond coatings in titanium
Service life on Al-alloy parts.
The preparation of the titanium-aluminium alloy part with diamond coatings of the above-mentioned offer of the application, it can complete to have again preparing
After the titanium-aluminium alloy part for closing infiltration layer, the deposition of diamond coatings on the compisite seeping layer, the titanium aluminium with diamond coatings is obtained
Alloy components.
Embodiment 1
Fig. 1 is the cross section structure schematic diagram for the titanium-aluminium alloy part with compisite seeping layer that the embodiment of the present application 1 provides.Such as figure
Shown in 1, the titanium-aluminium alloy part with compisite seeping layer, including titanium-aluminium alloy matrix 10, and it is arranged at the titanium-aluminium alloy
Compisite seeping layer 100 on matrix；Through-thickness is described compound from the titanium-aluminium alloy matrix 10 to the compisite seeping layer 100
Infiltration layer 100 (gross thickness is 45 μm) includes the TiAl being cascading2Layer 101 (thickness is 24 μm), the Ti for mixing zirconium5Si4Layer
102 (thickness is 9 μm), the TiSi for mixing zirconium2Layer 103 (thickness is 12 μm), and through-thickness is by the titanium-aluminium alloy matrix 10
To the compisite seeping layer 100, the thermal coefficient of expansion of the compisite seeping layer 100 is gradually decrease to the outermost layer 103 of compisite seeping layer
The thermal coefficient of expansion for the diamond coatings that thermal coefficient of expansion is formed with the later stage in the outermost layer of compisite seeping layer approaches.
The present embodiment provide the titanium-aluminium alloy part with compisite seeping layer, can use following methods preparation, specifically include with
Lower step：
Step 1：Successively using the sand paper (800 mesh, 1000 mesh, 1200 mesh and 1500 mesh) of No. 800#-1500# to titanium aluminium
Alloy substrate is polished, and is cleaned by ultrasonic after polishing using deionized water.Then using corrosive liquid to the titanium-aluminium alloy after polishing
Matrix carries out corrosion treatment 1 minute, wherein, it by the concentrated sulfuric acid and hydrogen peroxide according to volume ratio is 1 that etchant solution, which is,:10 ratio is come
Prepare, during corrosion after be cleaned by ultrasonic 10 minutes using deionized water, obtain the titanium-aluminium alloy sample after surface preparation.
Step 2：It is according to percentage by weight composition：20%Si powder, 0.5%Zr2O3Powder, 8%NaF powder, remaining is Al2O3
The ratio of powder prepares penetration enhancer, and all reagents are all that analysis is pure, wherein Si powder and Zr2O3The granularity of powder is both less than or received equal to 800
Rice, filler Al2O3The granularity of powder is more than 1 micron.
Step 3：The above-mentioned penetration enhancer prepared is placed in ball mill and ground 2 hours, various reagents is mixed
It is even, then the penetration enhancer after grinding is dried.
Step 4：Penetration enhancer after above-mentioned drying is loaded into crucible, and the alloy sample after above-mentioned surface preparation is vertical
In horizontal plane embedment penetration enhancer, keeping parallelism between adjacent alloys or workpiece；
Step 5：Crucible equipped with sample is capped and sealed, uses mass ratio as 1:1 Ludox and aluminum oxide it is mixed
Compound seals as sealant, crucible is dried 2 hours in 80 DEG C or so of drying box after sealing, so that sealant is complete
Solidification.
Step 6：The crucible of good seal is placed in Muffle furnace, and is warming up to Muffle furnace with 4 DEG C/min heating rate
1050 DEG C, room temperature is cooled to after being incubated 2 hours under the conditions of 1050 DEG C.
Step 7：The crucible that will be cooled to room temperature takes out, and opens crucible and takes out alloy sample, is surpassed using deionized water
Ultrasonic 5min in alcohol is placed in after sound 5min clocks again, final drying, obtains the titanium-aluminium alloy part with compisite seeping layer.
Furthermore, it is possible to (HWCVD) is vapor-deposited in the compisite seeping layer surface deposition growing diamond coatings using heated filament, it is complete
Into the preparation of the titanium-aluminium alloy part with diamond coatings, and the sedimentary condition of growing diamond membrane is：With CH4And H2Mixing
Gas is reacting gas, wherein CH4：H2=1：100 (volume ratios), the gas pressure in vacuum for maintaining depositing device are 3kPa, and are lamp
Silk application dc source, makes filament temperature reach 2300 DEG C, composite polycrystal-diamond crude product upper surface temperature is maintained 750
DEG C, the deposition growing time is 1.5h, obtains the diamond coatings that thickness is 1.5 μm, the diamond crystalses of diamond coatings are micro-
Meter level is other.
Embodiment 2：
Present embodiments provide a kind of titanium-aluminium alloy part with compisite seeping layer, including titanium-aluminium alloy matrix and be arranged at institute
State the compisite seeping layer on titanium-aluminium alloy matrix；The compisite seeping layer includes the titanium aluminium diffusion layer (thickness 4 being cascading
μm)、TiAl2Layer (thickness is 15 μm), the Ti for mixing zirconium5Si4Layer (thickness is 8 μm), the TiSi for mixing zirconium2Layer (thickness is 8 μm)；Institute
The thickness for stating compisite seeping layer is 35 μm；Through-thickness is from the titanium-aluminium alloy matrix to the compisite seeping layer, the compisite seeping layer
Thermal coefficient of expansion by 9.5 × 10-6/ DEG C it is gradually decrease to 4.0 × 10-6/℃。
The present embodiment additionally provides a kind of titanium-aluminium alloy part with diamond coatings, also raw on above-mentioned compisite seeping layer surface
With the diamond coatings that thickness is 2 μm.
Embodiment 3：
A kind of titanium-aluminium alloy part with diamond coatings, is prepared by following methods：
Step 1：Titanium-aluminium alloy matrix is polished successively using the sand paper of No. 800#-1500#, using going after polishing
Ionized water is cleaned by ultrasonic.Then corrosion treatment 2 minutes is carried out to the titanium-aluminium alloy matrix after polishing using corrosive liquid, wherein, it is rotten
It by the concentrated sulfuric acid and hydrogen peroxide according to volume ratio is 1 that erosion solution, which is,:10 ratio is prepared, during corrosion after surpassed using deionized water
Sound cleans 10 minutes, obtains the titanium-aluminium alloy sample after surface preparation.
Step 2：It is according to percentage by weight composition：10%Si powder, 3%Zr2O3Powder, 5%NaF powder, remaining is Al2O3Powder
Ratio prepare penetration enhancer, all reagents are all that analysis is pure, wherein Si powder and Zr2O3The granularity of powder is both less than or received equal to 800
Rice, filler Al2O3The granularity of powder is more than 1 micron.
Step 3：The above-mentioned penetration enhancer prepared is placed in ball mill and ground 3 hours, various reagents is mixed
It is even, then the penetration enhancer after grinding is dried.
Step 4：Penetration enhancer after above-mentioned drying is loaded into crucible, and the alloy sample after above-mentioned surface preparation is vertical
In horizontal plane embedment penetration enhancer, keeping parallelism between adjacent alloys or workpiece；
Step 5：Crucible equipped with sample is capped and sealed, uses mass ratio as 1:1 Ludox and aluminum oxide it is mixed
Compound seals as sealant, crucible is dried 2 hours in 100 DEG C or so of drying box after sealing, so that sealant is complete
All solidstate.
Step 6：The crucible of good seal is placed in Muffle furnace, and Muffle furnace is warming up to 1000 DEG C, heating rate 4
DEG C/min, it is cooled to room temperature after being incubated 5 hours under the conditions of 1000 DEG C.
Step 7：The crucible that will be cooled to room temperature takes out, and opens crucible and takes out alloy sample, is surpassed using deionized water
Ultrasonic 5min in alcohol is placed in after sound 5min clocks again, final drying, obtains the titanium-aluminium alloy part with compisite seeping layer.
Step 8：Sample after processing is placed on to the vacuum chamber of microwave plasma enhanced chemical vapor depsotition equipment
In, using following parameter in above-mentioned compisite seeping layer surface deposition growing diamond thin 2h：Using hydrogen and methane as reacting gas,
The flow of control hydrogen and methane is respectively 500sccm and 20sccm, deposition pressure 3kPa, 800 DEG C of substrate temperature, shape after deposition
Into diamond coatings thickness be 3 μm, the crystallite dimension of diamond is 80nm in diamond coatings；Complete that there is diamond to apply
The preparation of the titanium-aluminium alloy part of layer.
The appearance structure of the titanium-aluminium alloy part with compisite seeping layer obtained in the step of Fig. 2 is the embodiment of the present application 3 seven
Characterization result, (a) is backscattering section pattern, and (b) is the cross sectional elements distribution map of infiltration layer in (a), and wherein 1-8 points are away from oozing
The each point that the distance of layer surface increases successively, 1 point of distance away from layer surface is 0, and (c), (d) are the titanium aluminium with compisite seeping layer
X-ray diffraction (XRD) figure of the different-thickness of alloy components.
(a), (b) from Fig. 2 as can be seen that the titanium-aluminium alloy part with compisite seeping layer, including titanium-aluminium alloy matrix and
The compisite seeping layer being arranged on the titanium-aluminium alloy matrix, upward from the thickness of TiAl alloy matrix, the compisite seeping layer includes
Titanium aluminium diffusion layer (thickness is 9 μm), the TiAl being cascading2Layer (thickness is 16 μm), the Ti for mixing Zr5Si4Layer (thickness
For 10 μm), mix Zr TiSi2Layer (thickness is 10 μm), the gross thickness of the compisite seeping layer is 45 μm；And through-thickness is by institute
TiAl alloy matrix is stated to the compisite seeping layer, the thermal coefficient of expansion of the compisite seeping layer is by 9.2 × 10-6/ DEG C be gradually decrease to
3.5×10-6/ DEG C, the outermost layer of the compisite seeping layer-mix Zr TiSi2The thermal coefficient of expansion of layer and diamond coatings to be formed
Thermal coefficient of expansion approach, in addition, it can also be seen that Zr elements are evenly distributed on the Ti of the compisite seeping layer in Fig. 2 (b)5Si4
Layer and TiSi2In layer.
The outermost layer of test compound infiltration layer, and the XRD spectra after its outermost layer, intermediate layer are polished successively, such as Fig. 2
(c), shown in (d), TiSi can be observed respectively2、Ti5Si4、TiAl2XRD curves, this further demonstrates the compisite seeping layer
Stepped construction.
Embodiment 4：
The embodiment of the present application 4 provides a kind of titanium-aluminium alloy part with compisite seeping layer, including titanium-aluminium alloy matrix and
The compisite seeping layer being arranged on the titanium-aluminium alloy matrix, the compisite seeping layer include the TiAl being cascading2(thickness is layer
26 μm), mix the Ti of zirconium5Si4Layer (thickness is 10 μm)；The TiSi for mixing zirconium2Layer (thickness is 14 μm)；The thickness of the compisite seeping layer
Spend for 50 μm.Through-thickness is from the titanium-aluminium alloy matrix to the compisite seeping layer, the thermal coefficient of expansion of the compisite seeping layer
Gradually reduce, more specifically, by 9.3 × 10-6/ DEG C it is gradually decrease to 3.8 × 10-6/℃。
The present embodiment 4 additionally provides a kind of titanium-aluminium alloy part with diamond coatings, on above-mentioned compisite seeping layer surface also
Growth has the diamond coatings that thickness is 5 μm.
It should be noted that according to the above description the announcement of book and with illustrate, the application those skilled in the art also
Above-mentioned embodiment can be changed and changed.Therefore, the application is not limited to disclosed and described above specific real
Mode is applied, some equivalent modifications and change to the application should also be as within the protection domain of claims hereof.This
Outside, although having used some specific terms in this specification, these terms merely for convenience of description, not to the application
Form any restrictions.
Claims (8)
1. a kind of titanium-aluminium alloy part with compisite seeping layer, it is characterised in that including titanium-aluminium alloy matrix, and be arranged at described
Compisite seeping layer on titanium-aluminium alloy matrix；The compisite seeping layer includes the TiAl being cascading2Layer, the Ti for mixing zirconium5Si4Layer,
Mix the TiSi of zirconium2Layer, through-thickness is from the titanium-aluminium alloy matrix to the compisite seeping layer, the thermal expansion of the compisite seeping layer
Coefficient gradually reduces.
2. as claimed in claim 1 have compisite seeping layer titanium-aluminium alloy part, it is characterised in that the compisite seeping layer it is hot swollen
Swollen coefficient is by (9.0-9.5) × 10-6/ DEG C it is gradually decrease to (3.0-4.0) × 10-6/℃。
3. there is the titanium-aluminium alloy part of compisite seeping layer as claimed in claim 1, it is characterised in that the thickness of the compisite seeping layer
For 35-50 μm.
4. there is the titanium-aluminium alloy part of compisite seeping layer as claimed in claim 1, it is characterised in that the TiAl2Layer thickness be
12-26μm。
5. there is the titanium-aluminium alloy part of compisite seeping layer as claimed in claim 1, it is characterised in that the Ti5Si4The thickness of layer
For 8-12 μm；The TiSi2The thickness of layer is 9-15 μm.
6. there is the titanium-aluminium alloy part of compisite seeping layer as claimed in claim 1, it is characterised in that the compisite seeping layer also includes
Ti-Al diffusion layers, the Ti-Al diffusion layers are located at the titanium-aluminium alloy matrix and the TiAl2Between layer.
7. there is the titanium-aluminium alloy part of compisite seeping layer as claimed in claim 6, it is characterised in that the Ti-Al diffusion layers
Thickness be 3-10 μm.
8. a kind of titanium-aluminium alloy part with diamond coatings, it is characterised in that including titanium-aluminium alloy matrix, and set gradually
Compisite seeping layer and diamond coatings on the titanium-aluminium alloy matrix, wherein, the compisite seeping layer such as claim 1-7 is any
Described in.
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| CN109385599A (en) * | 2017-08-02 | 2019-02-26 | 深圳先进技术研究院 | Titanium-aluminium alloy part with compisite seeping layer and preparation method thereof, titanium-aluminium alloy part with diamond coatings and preparation method thereof |
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2017
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109385599A (en) * | 2017-08-02 | 2019-02-26 | 深圳先进技术研究院 | Titanium-aluminium alloy part with compisite seeping layer and preparation method thereof, titanium-aluminium alloy part with diamond coatings and preparation method thereof |
| CN109385599B (en) * | 2017-08-02 | 2023-05-26 | 深圳先进技术研究院 | Titanium-aluminum alloy piece with composite infiltration layer and preparation method thereof, and titanium-aluminum alloy piece with diamond coating and preparation method thereof |
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