CN103469119B - Amorphous composite materials, and preparation method and applications thereof - Google Patents
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Abstract
The invention belongs to the field of metal amorphous composite materials, and discloses amorphous composite materials, and a preparation method and applications thereof. The amorphous composite materials comprise nickel, zirconium, titanium, niobium, aluminum and copper with a nickel-based amorphous phase as a matrix phase and beta-Ti and (Cu,Ni) Ti2 as reinforcing phases, and comprise the specific components according to the atomic percentage: 30-59 at.% of Ni, 10-24 at.% of Zr, 10-35 at.% of Ti, 7-10 at.% of Nb, 3-7 at.% of Al, 1-3 at.% of Cu, and the balance being inevitable trace impurities. The amorphous composite materials are prepared by rapidly sintering a nickel-based amorphous powder and a titanium-based amorphous powder. With control of the addition amount of the nickel-based amorphous powder, the amorphous composite materials with different amorphous phase content can be obtained. The amorphous composite materials are nearly fully dense, and can be applied in the fields of aeronautics and astronautics, military industry and the like.
Description
Technical field
The invention belongs to amorphous metal field of compound material, particularly a kind of amorphous composite and its preparation method and application.
Background technology
Bulk amorphous alloys has the good mechanical property such as high strength, high rigidity, high elastic coefficient, but limits its application as structured material due to lower plasticity.Amorphous bulk matrix material can have the plasticity of raising because dislocation is bred by the retardance of second-phase.Meanwhile, amorphous bulk matrix material has the excellent over-all properties such as high strength, high rigidity, high elastic coefficient, corrosion-resistant and abradability, is thus with a wide range of applications in fields such as aerospace, electronics, instruments.The amorphous bulk matrix material that the Second Phase Particle of exploitation different scale and noncrystal substrate coexist has become the target that investigator pursues.
In the mechanical property of amorphous composite and its tissue, the character of amorphous and wild phase, yardstick, distribution and relative content have close contacting (D.C.Hofmann, J.Y.Suh, A.Wiest, et al.Nature., 2008,451,1085-1089.).At present, the amorphous bulk matrix material developed is standby mainly through melt solidifying legal system, different according to noncrystal substrate and second-phase character, following several types can be divided into: (1) additional refractory metal or ceramic particle make shear zone breed with the plasticity (H.C.Yim improving amorphous composite in noncrystal substrate, R.Busch
et al.Acta Mater, 1999,47 (8): 2455-2462.).(2) by J.W.Qiao(Appl.Phys.Lett., 2009,94:151905.) etc. report by well-designed alloying constituent and control alloy melt curing condition preparation in the amorphous composite of the nanocrystalline or Ultra-fine Grained of life.(3) obtaining structure by melt solidifying method is that ductility phase (α-Fe, β-Ti or β-Zr) dentrite is uniformly distributed in noncrystal substrate, has the iron-based (S.F.Guo of high strength and good plasticity, L.Liu, N.Li, et al.Scripta Materialia, 2010,62:329-33.), titanium base (He G, Eckert J
w, et al.Mater Res Symp, 2003,754:327-332.) and zirconium base (K ü hn U, Eckert J, Mattern N, et al.Appl.Phys.Lett., 2002,80 (14): 2478-2481.) amorphous composite.(4) selected alloying constituent, makes Ni-based amorphous reach thing and is separated and the special construction (N.Mattern, U.K ü hn, A.Geber., et al.Scripta Materialia, 2005,53:271-274.) forming two-phase amorphous under melt rapid condensation condition.But, the standby amorphous bulk matrix material of melt solidifying legal system limits by alloying constituent and curing condition, (diameter is generally less than 5mm to determine the extremely limited size of these amorphous composites, be generally 2 ~ 4mm) and the uncontrollability of content of amorphous, make it be difficult to meet the application requiring as engineering materials.
As a kind of alternative material forming method, mechanical alloying can synthesize the amorphous powdered alloy with wide supercooling liquid phase region, based on the difference of different system amorphous powdered alloy supercooling liquid phase region, the mechanical alloying powder consolidation techniques (comprising extruding, hot pressing and discharge plasma sintering) added subsequently is utilized to be a kind of feasible method preparing the amorphous composite of the block controlled content of amorphous of large-size.But, in the amorphous bulk matrix material developed, mostly can not control content of amorphous and wild phase particle is thick, fail to obtain the nanocrystalline and amorphous bulk matrix material of controlled content of amorphous of interior life.
Therefore, if by selecting suitable two-phase amorphous alloy component and content, the sintering process such as accurate control sintering temperature, utilize the difference of two-phase amorphous powdered alloy supercooling liquid phase region temperature, wherein a kind of non-crystaline amorphous metal reservation non-crystal structure is made to be that nanometer scale crystalline is as wild phase particle as matrix, another kind of amorphous alloy crystallization, obtain amorphous and nanocrystallinely to coexist, large size (structural part diameter is not less than 20mm) amorphous composite that content of amorphous is controlled, very important Research Significance will be had.So far, there is no the bibliographical information adopting powder metallurgy technology and Amorphous Crystallization method to be produced the amorphous composite of controlled content of amorphous by two-phase amorphous powdered alloy.
Summary of the invention
In order to overcome the shortcoming of above-mentioned prior art with not enough, primary and foremost purpose of the present invention is to provide a kind of amorphous composite.
Another object of the present invention is the preparation method providing a kind of above-mentioned amorphous composite.
Still a further object of the present invention is to provide the application of above-mentioned amorphous composite in space flight and aviation, military project.
Object of the present invention is realized by following proposal:
A kind of amorphous composite, containing nickel, zirconium, titanium, niobium, aluminium and copper, its microtexture with Ni-based amorphous phase for matrix phase, with β-Ti and (Cu, Ni) Ti
2for wild phase, concrete component and counting by atom percentage content: Ni 30 ~ 59at.%, Zr 10 ~ 24at.%, Ti 10 ~ 35at.%, Nb 7 ~ 10at.%, Al 3 ~ 7at.%, Cu 1 ~ 3at.%, all the other are inevitable trace impurity.
The preparation method of above-mentioned amorphous composite: described amorphous composite is formed through Fast Sintering by Ni-based amorphous powder and titanium-based amorphous powder.
Described Fast Sintering comprises at least one in the powder sintering method of extruding, hot pressing and discharge plasma sintering.
The concrete component of described Ni-based amorphous powder and counting by atom percentage content: Ni 55 ~ 59at.%, Zr 20 ~ 24at.%, Ti 6.0 ~ 10at.%, Nb 6.0 ~ 10at.%, Al 3.0 ~ 7.0at.%.
The concrete component of described titanium-based amorphous powder and counting by atom percentage content: Ti 64 ~ 68at.%, Nb 8 ~ 18at.%, Cu 6.0 ~ 10.5at.%, Ni 5.5 ~ 8.0at.%, Al 3.0 ~ 7.0at.%, all the other are inevitable trace impurity.
The consumption of described Ni-based amorphous powder by volume per-cent is 50 ~ 99%.
Specifically comprise following steps:
Step one: high-energy ball milling prepares amorphous powder
Ni-based amorphous powder and titanium-based amorphous powder are carried out high-energy ball milling respectively, until two kinds of alloy systems form the amorphous alloy powder with wide supercooling liquid phase region, two kinds of amorphous powders at least reach 95% by its volume percentage amorphous phase respective.
Step 2: pulse electric current sintering amorphous powder
Ni-based amorphous powder after ball milling and titanium-based amorphous powder are mixed, adopt the two-phase amorphous powder in pulsed current Fast Sintering loading sintering mold, accuracy controlling sintering parameter, adopt high pressure low temperature sintering, pulse electric current sintering processing condition are as follows:
Agglomerating plant: discharge plasma sintering system
Sintering current type: pulsed current
Crystallization temperature-the 20K of sintering temperature Ts:Ts >=titanium-based amorphous powder
The glass transformation temperature of Ts≤Ni-based amorphous powder
Soaking time: 10 ~ 20min
Temperature rise rate: 10 ~ 50K/min
Sintering pressure: 400 ~ 500MPa;
Namely to obtain in microtexture with Ni-based amorphous phase for matrix phase, with β-Ti and (Cu, Ni) Ti through sintering
2nanocrystalline is the amorphous composite of wild phase.
The concrete component of Ni-based amorphous powder described in step one and counting by atom percentage content: Ni 55 ~ 59at.%, Zr 20 ~ 24at.%, Ti 6.0 ~ 10at.%, Nb 6.0 ~ 10at.%, Al 3.0 ~ 7.0at.%.
The concrete component of titanium-based amorphous powder described in step one and counting by atom percentage content: Ti 64 ~ 68at.%, Nb 8 ~ 18at.%, Cu 6.0 ~ 10.5at.%, Ni 5.5 ~ 8.0at.%, Al 3.0 ~ 7.0at.%, all the other are inevitable trace impurity.
Described Ni-based amorphous powder and titanium-based amorphous powder are dry mixed to evenly respectively before high-energy ball milling in mixed powder machine.
The Ni-based amorphous content of described amorphous composite controls by the content controlling the Ni-based amorphous powder dropped into.
Sintering mold described in step 3 refers to tungsten carbide die.
By accurately controlling sintering temperature, utilizing difference that the is Ni-based and supercooling liquid phase region of titanium-based amorphous alloy powder, realizing Ni-based amorphous powder not crystallization, retain Ni-based amorphous phase; Titanium-based amorphous powder crystallization obtains nanocrystalline.The volume percent adjusting Ni-based and titanium-based amorphous powder controls the Ni-based amorphous content in metallic glass composite, and in the material of preparation, Ni-based amorphous content is 50 ~ 99at.%.
Above-mentioned amorphous composite can be applied in space flight and aviation, military project.
Mechanism of the present invention is:
The principle of preparation method of the present invention is: pulse electric current sintering technology has the advantage that heating rate is fast, sintering temperature is low, sintering time is short; Multicomponent amorphous alloy powder has superplasticity and lower viscosity in supercooling liquid phase region.The alloying constituent of the present invention's design, there is through high-energy ball milling preparation the Ni-based and titanium-based amorphous state powdered alloy of wide supercooling liquid phase region, based on the characteristic of Ni-based amorphous supercooling liquid phase region far above titanium-based amorphous supercooling liquid phase region, pulse electric current sintering technology is utilized to make amorphous alloy powder quick densifying shaping in the supercooling liquid phase region of titanium-based amorphous powder under pressure, then utilize Amorphous Crystallization method, make titanium-based amorphous in intensification sintering process subsequently complete crystallization change nanocrystalline or ultra-fine grained structure into.Meanwhile, ensure that the glass transformation temperature of sintering temperature lower than ni-based amorphous alloy is to retain Ni-based noncrystal substrate.In addition, the content of Ni-based noncrystal substrate in metallic glass composite and titanium base Crystallization Phases is controlled by the volume percent adjusting Ni-based and titanium-based amorphous powder, wherein Ni-based amorphous powder volume percent be not less than 50% with ensure sintering after form noncrystal substrate, titanium-based amorphous powder volume per-cent not higher than 50% to form crystallization wild phase.By accurately controlling sintering temperature, sintering pressure, heating rate and soaking time, control the nucleation and growth process of amorphous phase, can obtain large-size, content of amorphous is controlled, β-Ti and (Cu, Ni) Ti after crystallization
2the nanocrystalline metallic glass composite being uniformly distributed in noncrystal substrate.The present invention utilizes the difference of the supercooling liquid phase region of Ni-based and titanium-based amorphous alloy powder, utilize Fast Sintering realize Ni-based amorphous powder not crystallization retain noncrystal substrate, titanium-based amorphous powder crystallization thus obtain the preparation of the metallic glass composite with controlled content of amorphous.
The present invention has following advantage and beneficial effect relative to prior art:
(1) manufacturing process that combines of pulse electric current sintering technology of the present invention and Amorphous Crystallization method, the course of processing is simple, easy to operate, and lumber recovery is high, save material and near-net forming; Meanwhile, composite inner interface cleanness and second-phase controllable crystal are built in nanocrystalline size.By controlling the amount of the Ni-based amorphous powder added, the amorphous composite of different amorphous content can be obtained.
(2) preparation method of the present invention contributes to obtaining Multi-scale model material, provides the preparation method of the controlled amorphous composite of a kind of content of amorphous, and the amorphous bulk based composites of preparation is near complete fine and close, has β-Ti and (Cu, Ni) Ti
2the nanocrystalline microtexture being uniformly distributed in Ni-based noncrystal substrate.
(3) the pulse electric current sintering technology adopted due to the present invention has the advantages such as sintering temperature is low, soaking time is short, heating rate is fast, and multicomponent amorphous alloy powder has the distinctive feature of superplasticity and viscous rheological behaviour in the supercooling liquid phase region that it is wide, therefore, preparation method of the present invention has concentrated unique physical property of the advantage of material forming method and amorphous powdered alloy.
(4) amorphous composite of the present invention can be prepared into large-size bulk material, and its comprehensive mechanical property is good, and diameter is greater than 30mm, substantially meets the application requiring of some peculiar part, has popularizing application prospect widely in the field such as aerospace, military project.
Accompanying drawing explanation
Fig. 1 is the transmission electron microscope picture of the amorphous composite that embodiment 1 prepares, and wherein, A is the Ni-based amorphous phase of matrix phase, and B is wild phase (Cu, Ni) Ti
2, C is wild phase β-Ti.
Fig. 2 is the transmission electron microscope picture of the Ni-based amorphous phase of amorphous composite matrix phase that embodiment 1 prepares.
Fig. 3 is amorphous composite wild phase (Cu, the Ni) Ti that embodiment 1 prepares
2with the transmission electron microscope picture of β-Ti.
Embodiment
Below in conjunction with embodiment and accompanying drawing, the present invention is described in further detail, but embodiments of the present invention are not limited thereto.
Embodiment 1: the preparation of amorphous composite
Step one: mixed powder
Ni-based amorphous powder and titanium-based amorphous powder are prepared burden by following element and atomic percent consumption thereof respectively, Ni-based amorphous powder: Ni 57at.%, Zr 22at.%, Ti 8at.%, Nb 8at.%, Al 5at.%; Titanium-based amorphous powder: Ti 66at.%, Nb 13at.%, Cu 8at.%, Ni 6.8at.%, Al 6.2at.%, all the other are inevitable trace impurity.Nickel, titanium, zirconium, niobium, copper and aluminium all add with the form of simple substance, and wherein, the average particle size particle size of each element powder is all about 50 μm, and the purity except aluminium is except 99.0wt.%, and the purity of all the other particle powders is all higher than 99.9wt.%.Then, mixed powder is mixed in powder machine in V-0.002 type be respectively dry mixed 24h.
Step 2: high-energy ball milling prepares amorphous powder
Adopt QM-2SP20 type planetary ball mill to carry out high-energy ball milling, abrading-ball and ball grinder inwall material all adopt stainless steel, and ball material mass ratio is 10:1, fill high-purity argon gas as protective atmosphere during ball milling in ball grinder, and rotational speed of ball-mill is 3.8s
-1, Ni-based and titanium base alloy powder is placed in different ball grinder ball millings respectively.Ni-based and titanium-based amorphous powder Ball-milling Time is respectively 35h and 80h.Through detecting after completing high-energy ball milling, in two kinds of amorphous powders, the volume fraction of amorphous phase is more than 95%; Under heating rate is 20K/min, the glass transformation temperature 807K of the Ni-based amorphous powder of preparation, crystallization temperature are 870K, and supercooled liquid phase sector width is 63K; The glass transformation temperature 715K of titanium-based amorphous powder, crystallization temperature are 799K, and supercooled liquid phase sector width is 84K.
Step 3: pulse electric current sintering amorphous powder
By the Ni-based and titanium-based amorphous powder after high-energy ball milling by volume per-cent 6:4 mix, getting 20g mixing amorphous powder loading diameter is in the wolfram varbide sintering mold of Φ 20mm, by the first precompressed amorphous powder of positive and negative wolfram varbide electrode to 500MPa, be evacuated down to 4Pa, then applying argon gas protection; Agglomerating plant and processing condition as follows:
Agglomerating plant: Dr.Sintering SPS-825 discharge plasma sintering system
Sintering current type: pulsed current
The dutycycle of pulsed current: 12:2
Sintering temperature Ts:779K
Sintering time: with 10K/min from room temperature to 779K, insulation 20 minutes
Sintering pressure: 500MPa,
Carry out cryogenic high pressure sintering to powder, in resistance sintering and process of cooling, pressure remains at 500MPa, and can obtain diameter is the controlled amorphous composite of the content of amorphous of Φ 20mm.Detect through scanning electronic microscope and show (see Fig. 1 ~ 3), amorphous composite inside does not comprise obvious visible hole, and reach near complete fine and close, its density is 98.6%, and room temperature hardness is 697HV.Transmission electron microscope photo as shown in Figures 1 to 3, illustrate its structure with Ni-based amorphous phase be matrix phase, the grain-size of precipitation is β-Ti and (Cu, Ni) Ti of 25 ~ 35nm
2for wild phase, amorphous volume content is about 60%.
Embodiment 2: the preparation of amorphous composite
Step one: mixed powder
First Ni-based amorphous powder and titanium-based amorphous powder are prepared burden by following element and atomic percent consumption thereof respectively, Ni-based amorphous powder: Ni 57at.%, Zr 22at.%, Ti 8at.%, Nb 8at.%, Al 5at.%; Titanium-based amorphous powder: Ti 66at.%, Nb 13at.%, Cu 8at.%, Ni 6.8at.%, Al 6.2at.%, all the other are inevitable trace impurity.Nickel, titanium, zirconium, niobium, copper and aluminium all add with the form of simple substance, and wherein, the average particle size particle size of each element powder is all about 50 μm, and the purity except aluminium is except 99.0wt.%, and the purity of all the other particle powders is all higher than 99.9wt.%.Then, mixed powder is mixed in powder machine in V-0.002 type be respectively dry mixed 24h.
Step 2: high-energy ball milling prepares amorphous powder
Adopt QM-2SP20 type planetary ball mill to carry out high-energy ball milling, abrading-ball and ball grinder inwall material all adopt stainless steel, and ball material mass ratio is 10:1, fill high-purity argon gas as protective atmosphere during ball milling in ball grinder, and rotational speed of ball-mill is 3.8s
-1, Ni-based and titanium-based amorphous powder is placed in different ball grinder ball millings respectively.The Ball-milling Time of Ni-based and titanium-based amorphous powder is respectively 35h and 80h.Through detecting after completing high-energy ball milling, in two kinds of amorphous powders, the volume fraction of amorphous phase is more than 95%; Under heating rate is 20K/min, the glass transformation temperature 807K of the Ni-based amorphous powder of preparation, crystallization temperature are 870K, and supercooled liquid phase sector width is 63K; The glass transformation temperature 715K of titanium-based amorphous powder, crystallization temperature are 799K, and supercooled liquid phase sector width is 84K.
Step 3: pulse electric current sintering amorphous powder
By the Ni-based and titanium-based amorphous powder after high-energy ball milling by volume per-cent 5:5 mix, getting 20g mixing amorphous powder loading diameter is in the wolfram varbide sintering mold of Φ 20mm, by the first precompressed amorphous powder of positive and negative wolfram varbide electrode to 445MPa, be evacuated down to 4Pa, then applying argon gas protection; Agglomerating plant and processing condition as follows:
Agglomerating plant: Dr.Sintering SPS-825 discharge plasma sintering system
Sintering current type: pulsed current
The dutycycle of pulsed current: 12:2
Sintering temperature Ts:807K
Sintering time: with 40K/min from room temperature to 807K, insulation 15 minutes
Sintering pressure: 445MPa,
Carry out cryogenic high pressure sintering to powder, in resistance sintering and process of cooling, pressure remains at 445MPa, can obtain the amorphous composite that diameter is the controlled content of amorphous of Φ 20mm.Detect through scanning electronic microscope and show, amorphous composite inside does not comprise obvious visible hole, reaches near complete fine and close, its density is 99.3%, room temperature hardness is 772HV, the β-Ti of microtexture to be Ni-based amorphous phase be matrix phase, precipitation and (Cu, Ni) Ti
2nanocrystalline is wild phase, and amorphous volume content is about 50%.
Embodiment 3: the preparation of amorphous composite
Step one: mixed powder
Ni-based amorphous powder and titanium-based amorphous powder are prepared burden by following element and atomic percent consumption thereof respectively, Ni-based amorphous powder: Ni 59at.%, Zr 20at.%, Ti 10at.%, Nb 7at.%, Al 4at.%; Titanium-based amorphous powder: Ti 66at.%, Nb 18at.%, Cu 6.0at.%, Ni 6.5at.%, Al 3.5at.%, all the other are inevitable trace impurity.Nickel, titanium, zirconium, niobium, copper and aluminium all add with the form of simple substance, and wherein, the average particle size particle size of each element powder is all about 50 μm, and the purity except aluminium is except 99.0wt.%, and the purity of all the other particle powders is all higher than 99.9wt.%.Then, mixed powder is mixed in powder machine in V-0.002 type be respectively dry mixed 24h.
Step 2: high-energy ball milling prepares amorphous powder
Adopt QM-2SP20 type planetary ball mill to complete high-energy ball milling, abrading-ball and ball grinder inwall material all adopt stainless steel, and ball material mass ratio is 10:1, fill high-purity argon gas as protective atmosphere during ball milling in ball grinder, and rotational speed of ball-mill is 3.8s
-1, Ni-based and titanium-based amorphous powder is placed in different ball grinder ball millings respectively.The Ball-milling Time of Ni-based and titanium-based amorphous powder is respectively 40h and 75h.Through detecting after completing high-energy ball milling, in two kinds of amorphous powders, the volume fraction of amorphous phase is more than 95%; Under heating rate is 20K/min, the glass transformation temperature 809K of the Ni-based amorphous powder of preparation, crystallization temperature are 873K, and supercooled liquid phase sector width is 64K; The glass transformation temperature 718K of titanium-based amorphous powder, crystallization temperature are 802K, and supercooled liquid phase sector width is 84K.
Step 3: pulse electric current sintering amorphous powder
By the Ni-based and titanium-based amorphous powder after high-energy ball milling by volume per-cent mix than 9:1, getting 20g mixing amorphous powder loading diameter is in the wolfram varbide sintering mold of Φ 20mm, by the first precompressed amorphous powder of positive and negative wolfram varbide electrode to 400MPa, be evacuated down to 4Pa, then applying argon gas protection; Agglomerating plant and processing condition as follows:
Agglomerating plant: Dr.Sintering SPS-825 discharge plasma sintering system
Sintering current type: pulsed current
The dutycycle of pulsed current: 12:2
Sintering temperature Ts:805K
Sintering time: with 50K/min from room temperature to 805K, insulation 10 minutes
Sintering pressure: 400MPa,
Carry out Fast Sintering to powder, in resistance sintering and process of cooling, pressure remains at 400MPa, can obtain the amorphous composite that diameter is the controlled content of amorphous of Φ 20mm.Its density is 98.5%, and room temperature hardness is 690HV, and amorphous volume content is about 90%.
Embodiment 4: the preparation of amorphous composite
Ni-based amorphous powder and titanium-based amorphous powder are prepared burden by following element and atomic percent consumption thereof respectively, Ni-based amorphous powder: Ni 55at.%, Zr 24at.%, Ti 6at.%, Nb 8.5at.%, Al 6.5at.%; Titanium-based amorphous powder: Ti 67.5at.%, Nb 7.0at.%, Cu 10.5at.%, Ni 8.5at.%, Al 6.5at.%, all the other are inevitable trace impurity.
The step of the present embodiment and processing parameter thereof are all with embodiment 1.Can obtain diameter be Φ 20mm, be matrix phase with Ni-based amorphous phase, separate out the β-Ti of nano-scale and (Cu, Ni) Ti
2for the metallic glass composite that wild phase content of amorphous is controlled.Detect through scanning electronic microscope and show, composite inner does not comprise obvious visible hole, and reach near complete fine and close, its density is 97.4%, and room temperature hardness is 601HV, and amorphous volume content is about 60%.
Above-described embodiment is the present invention's preferably embodiment; but embodiments of the present invention are not restricted to the described embodiments; change, the modification done under other any does not deviate from spirit of the present invention and principle, substitute, combine, simplify; all should be the substitute mode of equivalence, be included within protection scope of the present invention.
Claims (9)
1. an amorphous composite, containing nickel, zirconium, titanium, niobium, aluminium and copper, is characterized in that: the microtexture of this amorphous composite with Ni-based amorphous phase for matrix phase, with β-Ti and (Cu, Ni) Ti
2for wild phase, concrete component and counting by atom percentage content: Ni 30 ~ 59at.%, Zr 10 ~ 24at.%, Ti 10 ~ 35at.%, Nb 7 ~ 10at.%, Al 3 ~ 7at.%, Cu 1 ~ 3at.%, all the other are inevitable trace impurity;
Described amorphous composite is formed through Fast Sintering by Ni-based amorphous powder and titanium-based amorphous powder.
2. amorphous composite according to claim 1, is characterized in that: described Fast Sintering refers to extrude, at least one in the powder sintering method of hot pressing and discharge plasma sintering.
3. amorphous composite according to claim 1, it is characterized in that: the concrete component of described Ni-based amorphous powder and counting by atom percentage content: Ni 55 ~ 59at.%, Zr 20 ~ 24at.%, Ti 6.0 ~ 10at.%, Nb 6.0 ~ 10at.%, Al 3.0 ~ 7.0at.%.
4. amorphous composite according to claim 1, it is characterized in that: the concrete component of described titanium-based amorphous powder and counting by atom percentage content: Ti 64 ~ 68at.%, Nb 8 ~ 18at.%, Cu 6.0 ~ 10.5at.%, Ni 5.5 ~ 8.0at.%, Al 3.0 ~ 7.0at.%, all the other are inevitable trace impurity.
5. amorphous composite according to claim 1, is characterized in that: the consumption of described Ni-based amorphous powder by volume per-cent is 50 ~ 99%.
6. amorphous composite according to claim 1, is characterized in that: described amorphous composite is prepared by the method specifically comprising following steps:
Step one: high-energy ball milling prepares amorphous powder
Ni-based amorphous powder and titanium-based amorphous powder are carried out high-energy ball milling respectively, until two kinds of alloy systems form the amorphous alloy powder with wide supercooling liquid phase region, two kinds of amorphous powders at least reach 95% by its volume percentage amorphous phase respective;
Step 2: pulse electric current sintering amorphous powder
Ni-based amorphous powder after ball milling and titanium-based amorphous powder are mixed, adopt the two-phase amorphous powder in pulsed current Fast Sintering loading sintering mold, accuracy controlling sintering parameter, adopt high pressure low temperature sintering, pulse electric current sintering processing condition are as follows:
Agglomerating plant: discharge plasma sintering system
Sintering current type: pulsed current
Crystallization temperature-the 20K of sintering temperature Ts:Ts >=titanium-based amorphous powder
The glass transformation temperature of Ts≤Ni-based amorphous powder
Soaking time: 10 ~ 20min
Temperature rise rate: 10 ~ 50K/min
Sintering pressure: 400 ~ 500MPa;
Namely to obtain in microtexture with Ni-based amorphous phase for matrix phase, with β-Ti and (Cu, Ni) Ti through sintering
2nanocrystalline is the amorphous composite of wild phase.
7. amorphous composite according to claim 6, it is characterized in that: the concrete component of Ni-based amorphous powder described in step one and counting by atom percentage content: Ni 55 ~ 59at.%, Zr 20 ~ 24at.%, Ti 6.0 ~ 10at.%, Nb 6.0 ~ 10at.%, Al 3.0 ~ 7.0at.%; The concrete component of described titanium-based amorphous powder and counting by atom percentage content: Ti 64 ~ 68at.%, Nb 8 ~ 18at.%, Cu 6.0 ~ 10.5at.%, Ni 5.5 ~ 8.0at.%, Al 3.0 ~ 7.0at.%, all the other are inevitable trace impurity; Described Ni-based amorphous powder and titanium-based amorphous powder are dry mixed to evenly respectively before high-energy ball milling in mixed powder machine.
8. amorphous composite according to claim 6, is characterized in that: the Ni-based amorphous content of described amorphous composite is controlled by the content controlling the Ni-based amorphous powder dropped into; Sintering mold described in step 2 refers to tungsten carbide die.
9. the application of amorphous composite according to claim 1 in space flight and aviation, military project.
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| CN108203793A (en) * | 2016-12-16 | 2018-06-26 | 刘志红 | A kind of Ni bases amorphous powder and preparation method |
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| CN108796408B (en) * | 2018-06-25 | 2019-08-20 | 中国人民解放军海军工程大学 | A kind of intensifying method of metallic particles enhancing amorphous composite material |
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| CN1354274A (en) * | 2000-11-22 | 2002-06-19 | 中国科学院金属研究所 | Nickel base amorphous alloy |
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| "放电等离子烧结−非晶晶化法合成钛基块状非晶复合材料";李元元等;《中国有色金属学报》;20111031;第21卷(第10期);第2305-2323页 * |
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