CN105803293B - A kind of Al-Cu based composite of carborundum and silicon grain enhancing and preparation method thereof - Google Patents
A kind of Al-Cu based composite of carborundum and silicon grain enhancing and preparation method thereof Download PDFInfo
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Abstract
Al-Cu based composite strengthened the present invention relates to a kind of carborundum and silicon grain and preparation method thereof, belongs to particles reiforced metal-base composition field.The composite is made up of carborundum, silicon and aluminium copper, and percentage by weight composition is carborundum：15~25wt.%, silicon：45~50wt.%, aluminium copper：25~40wt.%；Carborundum and silicon grain are mutually evenly distributed in aluminium copper matrix as enhancing, and aluminium copper matrix forms three-dimensional space net structure.Prepared using powder metallurgic method.The aluminum matrix composite even tissue of gained of the invention, completely densification, have the combination properties such as lightweight, low bulk, high-modulus, high intensity, resistance to space radiation environment, easy processing, are adapted to space environment to use, can be used as aerospace field related components material.
Description
Technical field
Al-Cu based composite strengthened the present invention relates to a kind of carborundum and silicon grain and preparation method thereof, should be with carbonization
Silicon and silicon grain are to strengthen phase, the composite that aluminium copper is matrix to have the spy of lightweight, low bulk, high-modulus, high intensity
Point, it is especially suitable for space environment and uses, belong to particles reiforced metal-base composition field.
Background technology
With the continuous development of aerospace flight technology, density of the complicated Service Environment of aerospace field to material, thermal expansion
The combination properties such as coefficient, modulus, intensity propose increasingly harsher requirement.In recent years, metal-base composites is low swollen with its
The combination properties such as swollen, high heat conduction, high-modulus, certain intensity, have in fields such as Aeronautics and Astronautics, electronics, the energy, traffic compared with
Aluminum Matrix Composites Strengthened by SiC, the carbon fiber for the Partial Species developed for good application prospect, some American-European countries increase
The metal-base composites such as strong aluminum matrix composite have been carried out engineering application, meet aeronautical and space technology application demand,
Achieve significant economic benefit simultaneously.
The common enhancing of metal-base composites mutually has silicon-carbide particle, silicon grain, silica dioxide granule, diamond
Grain, aluminum nitride particle, alundum (Al2O3) particle, boron carbide particles, carbon fiber etc., matrix has iron, aluminium, copper, magnesium, titanium and its alloy
Deng.With high intensity, low-expansion coefficient, high-modulus performance the alloy in lightweight matrix such as enhancing phase, heat-treatable strengthened aluminium, magnesium
Metal-base composites design and Development Trend are turned into, in Aero-Space composite, with high rigidity, the carbonization of high-modulus
For silicon as aluminum matrix composite of the aluminium alloy of phase, low-density as matrix is strengthened, technology is more ripe.Such as Britain AMC
The standby 25vol.%SiC/2124Al Modulus of Composites of company system is 115GPa, tensile strength 690MPa, thermal expansion
Coefficient is 15.5 × 10-6/K.But when silicon carbide body point is more than 25%, subsequent mechanical processing is more difficult.Beijing is coloured
It is 112GPa that metal, which studies the 50vol.%Si/Al-Cu Modulus of Composites that total institute develops, and bending strength is
548.3MPa, thermal coefficient of expansion are 12.7 × 10-6/ K, there is good combination property.Meanwhile silicon density 2.33g/cm3, carbonization
Silicon density 3.2g/cm3, silicon density ratio carborundum density low 27.2%.
The content of the invention
It is an object of the present invention to provide a kind of lightweight, low bulk, high-modulus, high intensity, resistance to space environment aluminum-base composite material
Material and preparation method thereof.
Carborundum has high-modulus (455GPa), high rigidity (2800Kg/mm2), low thermal coefficient of expansion (4 × 10-6/ K), its
Intrinsic property causes its particulates reinforcements as composite, and the thermal coefficient of expansion, raising for reduction composite are compound
The modulus and intensity of material have more obvious action.The composite prepared by the carborundum of single volume fraction, has excellent
Thermal coefficient of expansion, intensity, the combination property such as modulus.Silicon has high-modulus (130~190GPa), medium hardness (850Kg/
mm2), low thermal coefficient of expansion (2.6 × 10-6/ K), for carborundum, its hardness reduces, and material is easy to process.It is general and
Speech, the volume fraction of thermal coefficient of expansion and enhancing phase into negative correlation, and modulus and its into positive correlation.Consider modulus of elasticity,
Thermal coefficient of expansion, density, processing complexity, two kinds of carborundum and silicon grain are used mutually as enhancing phase, aluminium alloy for matrix
Prepare high body and divide particle enhanced aluminum-based composite material, be it is a kind of develop lightweight, low bulk, high intensity, high-modulus material it is new
Approach.The particle and x ray irradiation x environmental requirement material of space environment have certain ability to bear, material under this Service Environment
Performance change in less scope, meet the structure and performance of the component and equipment prepared under Service Environment by the material
Stability.Carborundum and silicon grain have preferable stability under radiation environment, material sheet under aluminium copper radiation environment
Its intrinsic property can also be maintained, carborundum, silicon and aluminium copper are combined, space radiation environment can be resistant to.
A kind of Al-Cu based composite of carborundum and silicon grain enhancing, strengthens aluminum bronze using carborundum and silicon grain two-phase
Based composites, it is made up of carborundum, silicon and aluminium copper, percentage by weight composition is carborundum：15~25wt.%, silicon：45
~50wt.%, aluminium copper：25~40wt.%；Wherein, aluminium copper is used as enhancing phase as matrix, carborundum and silicon grain
It is evenly distributed in aluminium copper matrix, aluminium copper matrix forms three-dimensional space net structure.
Described aluminium copper uses casting Al-Cu alloy, wherein the weight percent content of copper be 0.5wt.%~
6wt.%, preferably copper content are 0.5wt.%~4.5wt.%, and remaining is aluminium.The percentage by weight of the carborundum and silicon grain
Sum is 60wt.%~75wt.%.
To cause prepared composite easy to process, the content of the carborundum added is not higher than 25%.To cause
Prepared composite has low thermal coefficient of expansion, a high-modulus characteristic, and the total content of carborundum and silicon is not less than 60%.
To ensure that aluminum matrix composite is completely fine and close, the content of aluminium copper atomized powder is quiet in heat etc. not less than 25%
Press in densification process, aluminium copper atomized powder forms complete three-dimensional space network.
The composite of the present invention has lightweight, low bulk, high-modulus, high intensity, resistance to space radiation environment etc. comprehensive
Can advantage.The density of the composite is 2.50~2.95g/cm3, carborundum and silicon grain two-phase strengthen Al-Cu based composite
After being irradiated under space environment, bending strength, which reduces, is less than 10%, and modulus is basically unchanged.
Preparation method used in the Al-Cu based composite of above-mentioned carborundum and silicon grain enhancing is powder metallurgy process method,
Mainly include following process：
(1) aluminium copper atomized powder：Aluminium copper is according to percentage by weight dispensing, in aerosolizing device after casting
On prepare atomized powder；
(2) powder mixes：Carborundum powder, silica flour and aluminium copper atomized powder are according to percentage by weight dispensing, by pre-
After mixing, the mixed-powder that three kinds of particles are uniformly mixed and made into mixing tank is put into；
(3) isostatic cool pressing：Gained mixed-powder dress jacket is subjected to isostatic cool pressing, powder compacting；
(4) the pre- degasification of isostatic cool pressing billet：Isostatic cool pressing powder billet is subjected to pre- degasification；
(5) high temperature insostatic pressing (HIP)：Billet after pre- degasification reaches complete densification by high temperature insostatic pressing (HIP)；
(6) machine：The machined formation parts of composite billet that high temperature insostatic pressing (HIP) is densified.
In step (1), when aluminium copper is atomized, heating-up temperature is more than aluminium copper liquidus curve so that copper fills in aluminium
Divide dissolving；Heating-up temperature is atomized between 580~650 DEG C, atomizing gas is high-purity argon gas.Atomized powder after screening,
Obtain -600 mesh or more fine powder.
In step (2), three kinds of carborundum powder, silica flour and aluminium copper atomized powder powder are equipped with one after premixing
Determine the stainless steel steel ball of part by weight, stainless steel steel ball weight is about 3 times~10 times of powder gross weight, is put into afterwards in mixing tank
Mechanical mixture is carried out, incorporation time is 8~45 hours, and mixed powder, which repeatedly sieves, removes steel ball.
Carborundum powder particle mean size is 3.5~9 μm, and purity is more than or equal to 99.8wt.%；Silica flour particle mean size is 15~24
μm, purity is more than or equal to 99.9wt.%；Aluminium copper atomized powder, using casting Al-zn-mg-cu alloy (Cu：0.5wt.%~
Gas-atomised powders 6wt.%), particle mean size are the mesh of -900 mesh~-600, and purity is more than or equal to 99.8wt.%.
The ratio between particle mean size of silicon grain and silicon-carbide particle is preferably between 2.67~4.28, the draw ratio of two kinds of particles
Respectively less than 5.Aluminium copper atomized powder particle mean size is close with silicon grain particle mean size.
The content of silicon is higher than the content of carborundum in the present invention, to ensure that powder is easily mixed, the particle mean size of carborundum
Less than the particle mean size of silicon grain, the particle mean size of silicon grain is not more than 4.5 times of silicon-carbide particle particle mean size, so as to
Gap between filling aluminum copper powders and silicon grain.Selection silicon-carbide particle, silicon grain pattern are polygonal, particle aspect ratio is small
In 5 particle.The particle mean size of aluminum bronze atomizing particle is -600 mesh, and the granularity of atomized powder is also smaller than -600 mesh, atomized powder
End selects the preferable powder of sphericity after repeatedly sieving.When silicon grain content is higher than 60%, aluminum bronze atomized powder is put down
Equal granularity should be less than the particle mean size of silicon grain, and aluminum bronze atomized powder is well mixed with silicon grain when being mixed in order to powder, together
When in high temperature insostatic pressing (HIP) densification process easily with forming complete three dimensional matrix network structure.
In step (3), isostatic cool pressing uses rubber package set, and isostatic cool pressing is using rubber that is yielding, having some strength
As the material of jacket, ensure that the shrinkage factor of powder batch various pieces, cold pressing consistency are identical.Mixed-powder loads jacketPine dress consistency control is between 55%~75%, i.e., the relative density of described isostatic cool pressing powder billet
For 55%~75%.Described isostatic cool pressing pressure is 85~210MPa, and the dwell time is 10~50min.
In step (4), isostatic cool pressing powder billet loads vacuum degassing in steel capsule.Isostatic cool pressing billet is true using two-stage
Empty set system degasification, 35~85 hours degasification time, vacuum reaches requirement vacuum values after two-stage vacuum system must ensure degasification.Institute
In the pre- degassing procedure stated, vacuum is kept to be not higher than 3 × 10-2Pa, preferably vacuum is 3 × 10-3Pa~1 × 10-2Pa it
Between.
In step (5), high temperature insostatic pressing (HIP) densification temperature determines according to aluminum-copper-silicon ternary inorganic solution and the degree of superheat.It is described cold
Isostatic pressed blank is fitted into progress vacuum hotpressing densification in steel mold, and the temperature of high temperature insostatic pressing (HIP) is 440 DEG C~630 DEG C, excellent
It is selected between 530 DEG C~620 DEG C, pressure is 80~160MPa, and the dwell time is 3~4 hours.
In step (6), the billet after hot pressing is processed into required parts by machining steps, described machine adds
Work is the one or more in car, milling, plane, brill, mill, plasma cut and spark cutting etc..
Application of carborundum and silicon diphase particles the enhancing Al-Cu based composite of the present invention in space environment.The present invention
The aluminum matrix composite even tissue of gained, completely densification, have lightweight, low bulk, high-modulus, high intensity, resistance to space radiation
The combination properties such as environment, easy processing, average bending strength is 440~456.2MPa after particle irradiation, modulus is 103~
112GPa；Average bending strength is 439~458MPa after ultraviolet irradiation, and modulus is 103~117GPa.After two kinds of irradiation experiments
Bending strength compares the bending strength of predose, reduces percentage value and is less than 10%, can be used as aerospace field related components
Material.
Composite prepared by the present invention has following characteristic：
(1) lightweight：The double-phase composite of the present invention contains high-volume fractional, low-gravity silicon grain and low-density
Aluminium copper, its density are 2.50~2.94g/cm3, less than the Aluminum Matrix Composites Strengthened by SiC density and aluminium of same ratio
The proportion of Copper substrate.
(2) controllable low thermal coefficient of expansion：The carborundum of the present invention, the thermal expansion system of silicon grain enhancing double-phase composite
Number is 8.2~9.7 × 10-6/ K (27 DEG C~100 DEG C).The present invention uses powder metallurgical technique, and enhancing mutually can be controlled accurately, heat
The coefficient of expansion is controllable.
(3) high-modulus：The present invention Modulus of Composites between 103~117GPa, and AMC prepare
25vol.%SiC/ prepared by 25vol.%SiC/2124Al modulus of elasticity (115GPa), Beijing Non-Ferrous Metal Research General Academy
2009Al modulus of elasticity (112GPa) is close.
(4) high intensity：The composite bending strength of the present invention reaches 476~503MPa, and average value reaches 490MPa.
(5) resistance to space radiation environment：The aluminum matrix composite of the present invention passes through space environment particle irradiation and ultraviolet irradiation
Experiment, the performance change of material are little.107Under the conditions of rad irradiation doses, after particle irradiation average bending strength be 440~
456.2MPa, modulus are 103~112GPa；Under the conditions of ultraviolet radiance exposure reaches 5000ESH, averagely bent after ultraviolet irradiation
Intensity is 439~458MPa, and modulus is 103~117GPa.Before bending strength after two kinds of irradiation experiments compares experiment, hundred are reduced
Score value is less than 10%, and modulus of elasticity is identical with predose numerical value.
(6) even tissue, material are completely fine and close：The present invention is prepared by powder metallurgical technique, direct by powder
Mixing, reach microscopic ranges inner tissue uniformly, without particle agglomeration.(suitable high temperature insostatic pressing (HIP) is chosen by degasification and high temperature insostatic pressing (HIP)
Temperature), while excluding gas in composite, utilize formed aluminium silicon and aluminium copper silicon ternary system liquid phase, the shape in material
Into good interface cohesion and flowing powder filler space by liquid phase makes material reach complete densification.
The granularity of raw material powder of the present invention can be chosen within the specific limits, the microstructure of prepared composite
Size can also adjust within the specific limits.
(7) composition of material can be controlled accurately：The present invention uses powder metallurgy mixing procedure, is likend using weight to sub-control
System, the selection of raw material are easy to accurately control.
(8) good machinability：The content of carborundum is small in the composite of the present invention, and the content of silicon is high so that
The machinability of composite substantially improves.
The present invention has been prepared using carborundum and silicon two kinds of particles as the aluminum bronze base of enhancing phase by powder metallurgical technique
Composite, Fine Texture of Material is uniform and reaches complete densification.Material have low-gravity, low thermal coefficient of expansion, high modulus,
High bending strength, tolerance space radiation environment, it is easy to the features such as machining.Carborundum and silicon two-phase prepared by the present invention
Grain enhancing aluminum bronze matrix composite has good combination property, has what is applied on aerospace field key components and parts
Potentiality.
Preparation method of the present invention combines isostatic cool pressing, degasification by powder by atomization, accurate dosing and batch mixing
And high temperature insostatic pressing (HIP) densification process, the composition of material can be accurately controlled, ensures the uniformity and completely of the microstructure of material
Densification.The each process of the present invention is easily achieved, easy to operate, can independently be carried out.The present invention uses the preparation of composite
Method overcomes the methods of injection molding, stirring casting, Pressure Infiltration not fine and close, complex operation of material, is difficult to prepare large scale
The defects of big gauge material.The method considers there is synthesis from the quality and specification, serialization, mass production of prepared material
Advantage.
Embodiment
The present invention uses silicon-carbide particle particle mean size, and for 3.5 μm~9 μm, purity is more than 99.8%；Silicon grain is averaged
15~24 μm of granularity, purity is more than 99.9%；Aluminium alloy is using casting Al-zn-mg-cu alloy (Cu：0.5wt.%~6wt.%)
Gas-atomised powders, particle mean size are the mesh of -900 mesh~-600, and purity is more than 99.8%；Three's weight ratio for (15~
25wt.%)：(45~50wt.%)：(25~40wt.%).
The aluminum matrix composite for including above-mentioned three kinds of powder is prepared by powder metallurgical technique, is comprised the following steps：
(1) aluminium copper atomized powder：Aluminium copper is atomized after casting according to percentage by weight dispensing and prepares mist
Change powder；Atomized powder is prepared on aerosolizing device, powder after screening, obtains -600 mesh or more fine powder.
(2) powder mixes：Three kinds of powder are equipped with the stainless steel steel ball (stainless steel of constant weight ratio after premixing
Steel ball weight is about 3 times~10 times of powder gross weight), it is put into afterwards in mixing tank and carries out mechanical mixture, incorporation time is 8~36
Hour.Mixed powder sieving removes steel ball.
(2) carborundum powder, silica flour and atomized aluminum copper powder are put into mixing tank according to percentage by weight dispensing after premixing
In be uniformly mixed and made into the mixed-powders of three kinds of particles；
(3) isostatic cool pressing.Powder loads jacket after mixingPine dress consistency control is 55%~75%
Between.Isostatic cool pressing pressure is in 85~210MPa, 10~50min of press time.
(4) the pre- degasification of isostatic cool pressing billet.Isostatic cool pressing billet uses two-stage vacuum system degasification, and the degasification time is 35~
85 hours.Isostatic cool pressing powder batch loads vacuum degassing in steel capsule.Vacuum ensures 3 × 10-3Pa~1 × 10-2Pa。
(5) high temperature insostatic pressing (HIP).Heat and other static pressuring processes are：Between 440 DEG C~620 DEG C of temperature, 80~160MPa of pressure, during pressurize
Between 3~4 hours.
(6) machine.Billet after hot pressing is processed into required parts, machining process by machining steps
The processing work post being related to has car, milling, plane, mill, plasma cut etc., and specific work post of processing is one or more therein.
Here is the specific implementation case that two present invention prepare composite, to further illustrate the present invention, and unexpectedly
Taste limiting the scope of the invention.
Embodiment 1：
Using Al-0.5%wt.%Cu composition proportions, (i.e. aluminum bronze mass ratio is 995:5), set after casting in aerosolization
Standby upper atomized powder powder, atomization temperature are 580 DEG C, and atomization gas is high-purity argon gas, and sieving obtains -600 mesh atomized powders.Carbon
The particle mean size of SiClx is 9 μm, and the particle mean size of silicon grain is 24 μm, and the draw ratio of two kinds of particles is respectively less than 5.Carborundum, silicon
Particle, atomized powder press 1:2:1 proportioning, i.e. carborundum, silicon grain, the percetage by weight of atomized powder three-phase be respectively 25%,
50% and 25%.Three kinds of powder are 5 according to ratio of grinding media to material:1 proportioning mixes 12 hours on spherical batch mixer, the mixed powder after batch mixing
End loads after sievingRubber package set in, carry out isostatic cool pressing.Isostatic cool pressing pressure is 85MPa, during pressurize
Between be 50min.The powder billet of 55% consistency is obtained after isostatic cool pressing.Powder billet loads internal diameterLadle
Degasification and high temperature insostatic pressing (HIP) densification are carried out in set, 56 hours or so degasification time, in degassing procedure, keeps vacuum to be not higher than 3
×10-2Pa, the temperature of high temperature insostatic pressing (HIP) is 440 DEG C, pressure 80MPa, and the dwell time is 4 hours.The billet of densification passes through car
Processing is cut to obtainComposite billet.
Percetage by weight according to carborundum, silicon grain, atomized powder three-phase is respectively 25%, 50% and 25% preparation
Composite density is 2.50g/cm3：Bending strength is 476MPa, and modulus 117GPa, thermal coefficient of expansion is 8.2 × 10-6/K
(27 DEG C~100 DEG C), 107Under the conditions of rad irradiation doses, average bending strength is 451MPa after particle irradiation, and modulus is
115GPa；Under the conditions of ultraviolet radiance exposure reaches 5000ESH, average bending strength is 454MPa after ultraviolet irradiation, and modulus is
116GPa。
Embodiment 2：
Using Al-4.5%wt.%Cu composition proportions, (i.e. aluminum bronze mass ratio is 955:45), in aerosolization after casting
Atomized powder powder in equipment, atomization temperature are 650 DEG C, and atomization gas is high-purity argon gas, and sieving obtains -900 mesh atomized powders.
The particle mean size of carborundum is 3.5 μm, and the particle mean size of silicon grain is 15 μm.Carborundum, silicon grain, atomized powder press 3:9:8
Proportioning, i.e., carborundum, silicon grain, the percetage by weight of atomized powder three-phase are respectively 15%, 45% and 40%.Three kinds of powder are pressed
It is 3 according to ratio of grinding media to material:1 proportioning mixes 26 hours on spherical batch mixer, and the mixed-powder after batch mixing loads after sievingRubber package set in, carry out isostatic cool pressing.Isostatic cool pressing pressure is 210MPa, dwell time 10min.It is cold etc. quiet
The powder billet of 75% consistency is obtained after pressure.Powder billet loads internal diameterSteel capsule in carry out degasification and heat
Isostatic pressed is densified, 56 hours or so degasification time, and in degassing procedure, it is 1 × 10 to keep vacuum-2Pa, the temperature of high temperature insostatic pressing (HIP)
Spend for 620 DEG C, pressure 160MPa, the dwell time is 3 hours.The billet of densification obtains by turnery processing's
Composite billet.
Percetage by weight according to carborundum, silicon grain, atomized powder three-phase is respectively 15%, 45% and 40% preparation
Composite density is 2.94g/cm3, bending strength 503MPa, modulus 103GPa, thermal coefficient of expansion is 9.7 × 10-6/K
(27 DEG C~100 DEG C), 107Under the conditions of rad irradiation doses, average bending strength is 478MPa after particle irradiation, and modulus is
103GPa；Under the conditions of ultraviolet radiance exposure reaches 5000ESH, average bending strength is 475MPa after ultraviolet irradiation, and modulus is
101GPa。
Embodiment 3：
Using Al-6.0%wt.%Cu composition proportions, (i.e. aluminum bronze mass ratio is 940:60), in aerosolization after casting
Atomized powder powder in equipment, atomization temperature are 650 DEG C, and atomization gas is high-purity argon gas, and sieving obtains -700 mesh atomized powders.
The particle mean size of carborundum is 5 μm, and the particle mean size of silicon grain is 19 μm.Carborundum, silicon grain, atomized powder press 8:19:13
Proportioning, i.e., carborundum, silicon grain, the percetage by weight of atomized powder three-phase are respectively 20%, 47.5% and 32.5%.Three kinds of powder
End is 7 according to ratio of grinding media to material:1 proportioning mixes 43 hours on spherical batch mixer, and the mixed-powder after batch mixing loads after sievingRubber package set in, carry out isostatic cool pressing.Isostatic cool pressing pressure is 110MPa, dwell time 27min.It is cold etc.
The powder billet of 63% consistency is obtained after static pressure.Powder billet loads internal diameterSteel capsule in carry out degasification and
High temperature insostatic pressing (HIP) is densified, 56 hours or so degasification time, and in degassing procedure, it is 2.5 × 10 to keep vacuum-2Pa, high temperature insostatic pressing (HIP)
Temperature be 500 DEG C, pressure 90MPa, the dwell time be 3.5 hours.The billet of densification obtains by turnery processingComposite billet.
Percetage by weight according to carborundum, silicon grain, atomized powder three-phase is respectively 20%, 47.5% and 32.5% system
Standby composite density is 3.07g/cm3, bending strength 497MPa, modulus 108GPa, thermal coefficient of expansion is 8.9 × 10-6/ K (27 DEG C~100 DEG C), 107Under the conditions of rad irradiation doses, average bending strength is 453MPa after particle irradiation, and modulus is
108GPa；Under the conditions of ultraviolet radiance exposure reaches 5000ESH, average bending strength is 452MPa after ultraviolet irradiation, and modulus is
107GPa。
It may be selected to use aluminum bronze atomized powder of the particle mean size for the mesh of -900 mesh~-600, particle mean size 15 in the present invention
μm~24 μm of Si powder, particle mean size is 3.5 μm~9 μm of SiC powder.Carborundum mutually uniformly divides with silicon as enhancing in the present invention
Cloth forms diphase particles enhancing Al-Cu based composite in three-dimensional netted aluminum bronze matrix.
Carborundum and silicon diphase particles enhancing Al-Cu based composite prepared by the inventive method, 20 DEG C~100 DEG C of heat
The coefficient of expansion is 8.2~9.7 × 10-6/ K (27 DEG C~100 DEG C), bending strength are 476~503MPa, modulus of elasticity is 103~
117GPa, average bending strength is 451~478MPa after particle irradiation, and modulus is 103~112GPa；It is average curved after ultraviolet irradiation
Qu Qiangdu is 454~475MPa, and modulus is 103~117GPa.Bending strength after two kinds of irradiation experiments is curved compared to predose
Qu Qiangdu, reduce percentage value and be less than 10%.It is the aluminum matrix composite even tissue of gained of the invention, completely fine and close, have lightweight,
The combination properties such as low bulk, high-modulus, high intensity, resistance to space radiation environment, easy processing, can be used as aerospace field correlation zero
Component materials.
Claims (10)
1. a kind of carborundum and the Al-Cu based composite of silicon grain enhancing, it is characterised in that：By carborundum, silicon and aluminium copper
Composition, percentage by weight composition is carborundum：15~25wt.%, silicon：45~50wt.%, aluminium copper：25~40wt.%；
Carborundum and silicon grain are mutually evenly distributed in aluminium copper matrix as enhancing, and it is netted that aluminium copper matrix forms three dimensions
Structure.
2. carborundum as claimed in claim 1 and the Al-Cu based composite of silicon grain enhancing, it is characterised in that：Described aluminium
Copper alloy uses casting Al-Cu alloy, and the wherein weight percent content of copper is 0.5wt.%~6wt.%, and remaining is aluminium.
3. the preparation method of carborundum as claimed in claim 1 or 2 and the Al-Cu based composite of silicon grain enhancing, including such as
Lower step：
(1) aluminium copper prepares atomized powder after casting according to percentage by weight dispensing on aerosolizing device；
(2) carborundum powder, silica flour and aluminium copper atomized powder after premixing, are put into mixed according to percentage by weight dispensing
The mixed-powder of three kinds of particles is uniformly mixed and made into batch can；
(3) gained mixed-powder dress jacket is subjected to isostatic cool pressing, powder compacting；
(4) isostatic cool pressing powder billet is subjected to pre- degasification；
(5) billet after pre- degasification reaches complete densification by high temperature insostatic pressing (HIP)；
(6) the machined formation parts of composite billet for being densified high temperature insostatic pressing (HIP).
4. the preparation method of carborundum as claimed in claim 3 and the Al-Cu based composite of silicon grain enhancing, its feature exist
In：For the atomization temperature of described aluminium copper between 580~650 DEG C, atomization gas is high-purity argon gas.
5. the preparation method of carborundum as claimed in claim 3 and the Al-Cu based composite of silicon grain enhancing, its feature exist
In：Carborundum powder particle mean size is 3.5~9 μm, and purity is more than or equal to 99.8wt.%；Silica flour particle mean size is 15~24 μm, pure
Degree is more than or equal to 99.9wt.%；Aluminium copper atomized powder particle mean size is the mesh of -900 mesh~-600, and purity is more than or equal to
99.8wt.%.
6. the preparation method of carborundum as claimed in claim 5 and the Al-Cu based composite of silicon grain enhancing, its feature exist
In：For the ratio between particle mean size of silicon grain and silicon-carbide particle between 2.67~4.28, the draw ratio of two kinds of particles is respectively less than 5.
7. the preparation method of carborundum as claimed in claim 3 and the Al-Cu based composite of silicon grain enhancing, its feature exist
In：Described isostatic cool pressing pressure is 85~210MPa, and the dwell time is 10~50min；Described isostatic cool pressing powder billet
Relative density be 55%~75%.
8. the preparation method of carborundum as claimed in claim 3 and the Al-Cu based composite of silicon grain enhancing, its feature exist
In：In described degassing procedure, vacuum is not higher than 3 × 10-2Pa, degasification time are 35~85 hours.
9. the preparation method of carborundum as claimed in claim 3 and the Al-Cu based composite of silicon grain enhancing, its feature exist
In：The temperature of described high temperature insostatic pressing (HIP) is 440 DEG C~630 DEG C, and pressure is 80~160MPa, and the dwell time is 3~4 hours.
10. carborundum as claimed in claim 1 or 2 and the Al-Cu based composite of silicon grain enhancing are in aerospace field zero
Application in part.
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| CN201410852362.3A CN105803293B (en) | 2014-12-31 | 2014-12-31 | A kind of Al-Cu based composite of carborundum and silicon grain enhancing and preparation method thereof |
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| CN106735190B (en) * | 2016-12-07 | 2019-03-22 | 北京有色金属研究总院 | A kind of preparation method of particle enhanced aluminum-based composite material large scale thick-wall tube |
| CN108746637B (en) * | 2018-06-26 | 2021-01-08 | 中南大学 | Aluminum silicon/aluminum silicon carbide gradient composite material and preparation method thereof |
| CN111334762A (en) * | 2018-12-18 | 2020-06-26 | 有研工程技术研究院有限公司 | Powder metallurgy AlSnCu alloy target material and preparation method thereof |
| CN115852275B (en) * | 2022-03-31 | 2024-01-09 | 南京航空航天大学 | Ultra-light high-strength fiber reinforced aluminum-lithium alloy composite material and preparation method thereof |
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| CN102114541A (en) * | 2009-12-30 | 2011-07-06 | 北京有色金属研究总院 | Preparation process of high volume fraction silicon particle enhanced aluminum based composite material |
| CN103160716A (en) * | 2011-12-19 | 2013-06-19 | 北京有色金属研究总院 | Low-heat-expansion high-intensity alumina-silicon-aluminum (AlN-Si-Al) mixed composite material and preparation method thereof |
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| CN102114541A (en) * | 2009-12-30 | 2011-07-06 | 北京有色金属研究总院 | Preparation process of high volume fraction silicon particle enhanced aluminum based composite material |
| CN103160716A (en) * | 2011-12-19 | 2013-06-19 | 北京有色金属研究总院 | Low-heat-expansion high-intensity alumina-silicon-aluminum (AlN-Si-Al) mixed composite material and preparation method thereof |
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