CN108723371A - A kind of high-entropy alloy reinforced aluminum matrix composites and preparation method - Google Patents
A kind of high-entropy alloy reinforced aluminum matrix composites and preparation method Download PDFInfo
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- CN108723371A CN108723371A CN201810674106.8A CN201810674106A CN108723371A CN 108723371 A CN108723371 A CN 108723371A CN 201810674106 A CN201810674106 A CN 201810674106A CN 108723371 A CN108723371 A CN 108723371A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
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- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/20—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces by extruding
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B22F9/00—Making metallic powder or suspensions thereof
- B22F9/02—Making metallic powder or suspensions thereof using physical processes
- B22F9/04—Making metallic powder or suspensions thereof using physical processes starting from solid material, e.g. by crushing, grinding or milling
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- C22C1/00—Making non-ferrous alloys
- C22C1/04—Making non-ferrous alloys by powder metallurgy
- C22C1/0408—Light metal alloys
- C22C1/0416—Aluminium-based alloys
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- C—CHEMISTRY; METALLURGY
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- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/20—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces by extruding
- B22F2003/208—Warm or hot extruding
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B22F9/00—Making metallic powder or suspensions thereof
- B22F9/02—Making metallic powder or suspensions thereof using physical processes
- B22F9/04—Making metallic powder or suspensions thereof using physical processes starting from solid material, e.g. by crushing, grinding or milling
- B22F2009/043—Making metallic powder or suspensions thereof using physical processes starting from solid material, e.g. by crushing, grinding or milling by ball milling
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Abstract
The invention discloses a kind of high-entropy alloy reinforced aluminum matrix composites and preparation methods.Preparation process includes designing the high-entropy alloy system of high rigidity, and high-entropy alloy powder is prepared according to progress vacuum high-energy ball milling after calculating proportioning；Al alloy powder is added according to proportioning and carries out mixed powder；The aluminum matrix composite of high-entropy alloy enhancing is prepared using Hot-extrusion.The composite material of acquisition can improve reinforced phase and alloy matrix aluminum interface bond strength, and composite material is made to have good mechanical property.
Description
Technical field
The invention belongs to metal-base composites technical fields, and in particular to a kind of high-entropy alloy enhancing aluminium alloy compound material
Material and preparation method thereof.
Background technology
Block high-entropy alloy (HEA) has high intensity, high rigidity, low elasticity modulus and big elastic strain limit etc. one
Series is different from the excellent mechanical performance of traditional crystal alloy so that it is considered as the structural material of great potential.However, high
Brittleness makes HEA materials in the case of not apparent room temperature macroscopic view plastic deformation, and calamity occurs in a manner of catastrophic failure
Fracture；High brittleness, high rigidity bring extreme difficulties to the processing of material.These all seriously restrict HEA as advanced knot
Large-scale application of the structure material in engineering.Therefore, brittleness at room temperature, processing difficulties problem have been developed as HEA material applications
Important bottleneck.
Invention content
In order to overcome drawbacks described above, a kind of high-entropy alloy reinforced aluminum matrix composites of present invention offer and preparation method,
While keeping its excellent in strength and hardness, the plasticity of composite material is improved.
In order to achieve the above-mentioned object of the invention, the present invention adopts the following technical scheme that：
A kind of high-entropy alloy reinforced aluminum matrix composites, which is characterized in that using aluminium alloy as matrix, high-entropy alloy is enhancing
Phase, high-entropy alloy are the high-entropy alloy powder with body-centered cubic structure.
The high-entropy alloy is body center cubic solid solution (BCC) alloy system that each alloy compositions are generated according to atomic ratio；
In high-entropy alloy, Al, Fe, Cr, Co, Ni, Cu, Ti metal powder purity>99.9%, granularity≤45 μm.The matrix is
Al alloy powder, the purity of the Al alloy powder>99.9%, granularity≤300 μm.The composite material alloy matrix aluminum can be 2
It is to the aluminium alloy of 5 systems.
In composite material, the mass content of high-entropy alloy is 10-40wt%, and the mass content of aluminium alloy powder is 60-
90wt%.
A kind of preparation method of high-entropy alloy reinforced aluminum matrix composites, which is characterized in that include the following steps：
1) raw material selects：Al, Fe, Cr, Co, Ni, Cu, Ti metal powder purity>99.9%, granularity≤45 μm；
The purity of Al alloy powder>99.9%, granularity≤300 μm；Weigh each metal powder；
2) load weighted metal powder is placed in stainless-steel vacuum grinding jar, inert gas is filled with after vacuumizing, in high energy
Carry out mechanical alloying in ball mill, dry grind 300~500r/min of rotating speed, and the dry grinding time is 40~50h, 2~5h of wet-milling time,
Wet-milling rotating speed is 100~300r/min；First dry grind, rear wet-milling；After wet-milling, vacuum tank is opened, very
After the dry 24~36h of sky, through 50~100r/min, 1~2h of ball milling, high-entropy alloy powder is prepared；
3) prepared by composite material powder：Load weighted aluminium in proportion is added in the high-entropy alloy powder that step 2) obtains to close
Bronze body prepares composite material powder by the mechanical mixture 3-5h of 150~200r/min；Composite material powder
In, the mass content of high-entropy alloy is 10-40wt%, and the mass content of aluminium alloy powder is 60-90wt%；
4) hot-pressed：Composite material fission is cold-pressed to obtain ingot blank, then carries out hot extrusion, squeezing temperature is
400-600 DEG C, extrusion ratio 10-15, finally obtain the aluminum matrix composite of high-entropy alloy enhancing.
The purity of Al, Fe, Cr, Co, Ni, Cu, Ti metal powder>99.9%, granularity≤45 μm；The Al alloy powder
Granularity≤200 μm.
Further, preparation method the specific steps are：
A) each metal-powder of ball milling will be waited for be put into stainless steel grinding jar, using stainless steel ball as abrasive body, according to not
Less than 10:1 ball powder quality compares ball milling；Before ball milling, 10min first is vacuumized with vacuum machine, is filled with 0.5MPa argon gas work later
For protective gas；The rotating speed of ball mill is 350r/min, and needs adjustment direction of rotation primary per 60min；
B) absolute ethyl alcohol is added in the powder of dry grinding 45h and carries out wet-milling 5h；After ball milling terminates, ball grinder is taken out, it will
Vacuum drying chamber is opened, and then opens ball grinder cover, and reserve certain gap, chamber door is shut after putting it into drying box；
Temperature is adjusted to 50 DEG C after being vacuumized with vacuum machine, is taken out after drying for 24 hours；Powder after dry is put into
In ball mill, with the rotating speed ball milling 2h of 120r/min, taken out for use after the screening of high-entropy alloy composite powder is prepared；
C) composite material is densified：6061 aluminium of high-entropy alloy composite powder and 80wt% that the step 2) of 20wt% is obtained
Alloy powder, which is placed in ball grinder, carries out powder mixing machine；Extrusion forming is carried out to composite powder；It is cold-pressed, obtains diameter
For the ingot blank of 13.5mm and height~23mm, hot extrusion is then carried out, it is 450 DEG C to squeeze temperature, extrusion ratio 11.4, final
To a diameter of 4mm, the aluminum matrix composite that length is about 135mm.
The high-entropy alloy composite material is tested using XRD, TEM, testing machine for mechanical properties etc..
The present invention high-entropy alloy reinforced aluminum matrix composites, by composition design and preparation process make alloy reinforcement with
High-entropy alloy body based on the hard body center cubic solid solution (BCC) of high-strength height, the high-entropy alloy obtained by high-energy ball milling are to receive
Rice is brilliant or Ultra-fine Grained segregation is on aluminium alloy crystal boundary, and generation metal phase enhancing is strengthened；It is high in heating, pressurization densification process
Entropy alloy phase while keeping respective crystal structure, forms the Interface bonding mechanism for having and centainly spreading with aluminium alloy phase, from
And realize that the strong modeling of high-entropy alloy enhancing Al alloy composite combines, the high-entropy alloy enhancing aluminium base for preparing high-strength and high ductility is multiple
Condensation material.
Description of the drawings
The high-entropy alloy reinforced aluminum matrix composites schematic diagram for the embodiment 1 that Fig. 1 hot extrusions obtain；
Fig. 2 is the XRD analysis figure of composite material prepared by embodiment 1；
Fig. 3 is the stress-strain curve of the composite material of embodiment 1；
Fig. 4 is the high-entropy alloy reinforced aluminum matrix composites schematic diagram of embodiment 2；
Fig. 5 is the XRD analysis figure of composite material prepared by embodiment 2.
Specific implementation mode
The present invention is further described below by embodiment and attached drawing.
The selection of raw material：According to the form below 1 weigh purity be 99.99% Al, Fe, Cr, Co, Ni, Cu metal powder, granularity≤
45μm.Wherein table 1 prepares the quality that composite material selects metal constituent element, unit g.
Table 1 prepares the quality that composite material selects metal constituent element
Embodiment 1
(1) prepared by composite granule：By upper table by ready FeNiCoCrCuAl2.8(under be designated as molar ratio) powder is in height
Mechanical alloying can be carried out in ball mill, dry grinding rotating speed is 350r/min, after the 40h that dry grinds, wet-milling time 5h, wet-milling rotating speed
Two aspect high-entropy alloy FeNiCoCrCuAl of body-centered is prepared in 300r/min2.8Powder.It is as follows：
A) powder of ball milling will be waited for be put into stainless steel grinding jar, using stainless steel ball as abrasive body, according to not less than 10:
1 ball powder quality compares ball milling.Before ball milling, 10min first is vacuumized with vacuum machine, is filled with 0.5MPa argon gas later as protection gas
Body；The rotating speed of ball mill is 350r/min, and needs adjustment direction of rotation primary per 60min.
B) absolute ethyl alcohol is added in the powder of ball milling 45h and carries out wet-milling 5h.After ball milling terminates, ball grinder is taken out, it will
Vacuum drying chamber is opened, and then opens ball grinder cover, and reserve certain gap, chamber door is shut after putting it into drying box.
Temperature is adjusted to 50 DEG C after being vacuumized with vacuum machine, is taken out after drying for 24 hours.Powder after dry is put into
In ball mill, with the rotating speed ball milling 2h of 120r/min, taken out for use after the screening of high-entropy alloy composite powder is prepared.
(2) composite material is densified：By above-mentioned high-entropy alloy composite powder (20wt%) and 6061 aluminium alloy powders
(80wt%), which is placed in ball grinder, carries out powder mixing machine；Extrusion forming is carried out to composite powder.It is cold-pressed, is obtained first
Then the ingot blank of a diameter of 13.5mm and height~23mm carry out hot extrusion, it is 450 DEG C to squeeze temperature, extrusion ratio 11.4, most
A diameter of 4mm as shown in Figure 1, the aluminum matrix composite that length is about 135mm are obtained eventually.
(3) structure and performance characterization test above-mentioned sample using XRD, testing machine for mechanical properties etc..XRD analysis
Show that aluminium alloy and high-entropy alloy keep respective crystallographic structure (Fig. 2).In conjunction with Fig. 1, endogenous TiC distribution of particles is in crystal boundary
Place, and fcc solid solution crystal grain is squeezed in alloy compaction process, cause the appearance of deformation twin；The pressure of the composite material
Contracting yield strength, fracture strength and plastic strain respectively reach 350.6251Mpa, 470.7533MPa and 16.0617% (Fig. 3),
Micro-hardness average out to 129.9Hv (6061 aluminum alloy hardness 48.66HV of hot extrusion) see the table below 2 with the comparison of 6061 aluminium alloys.
2 extension test tables of data of table
It is prepared by 2 composite granule of embodiment：By upper table 1 by ready TiFeNiCoCrCuAl2(under be designated as molar ratio) system
It is standby go out high-entropy alloy powder, specific steps reference implementation example 1.
The alloy substrate of composite material selects 7075 aluminium alloys, composite material preparation process reference implementation example 1.Composite material
Pictorial diagram and XRD analysis are shown in Fig. 4 and Fig. 5.XRD analysis shows that aluminium alloy and high-entropy alloy keep respective crystallographic structure (figure
5).Compression yield strength, fracture strength and the plastic strain of the composite material respectively reach 354.5251Mpa,
469.7032MPa and 16.165%.
It is prepared by 3 composite granule of embodiment：By upper table 1 by ready Ti1.5FeNiCoCrCuAl (under be designated as molar ratio) systems
It is standby go out high-entropy alloy powder, specific steps reference implementation example 1.
The alloy substrate of composite material selects 7075 aluminium alloys, composite material preparation process reference implementation example 1.
The high-entropy alloy reinforced aluminum matrix composites of the present invention, using high-entropy alloy particle as reinforced phase.Be first according to
The design principle of high-entropy alloy designs the hard high-entropy alloy system of high-strength height；Proportioning alloy is carried out according to design ingredient, using machine
Tool alloying process, vacuum sphere grind the high-entropy alloy powder taken with body-centered cubic structure；The high-entropy alloy powder that will be prepared
Body and the aluminium alloy powder of selection carry out sufficient mechanical mixture；Using at the technique of base hot extrusion again, preparing high-strength height in advance
Tough high-entropy alloy composite material.
The above is only a preferred embodiment of the present invention, it should be pointed out that：For the ordinary skill people of the art
For member, without departing from the principle of the present invention, the replacement of several improvement and equivalent form can also be made, these improvement
The technical solution obtained with equivalent replacement should also belong to the scope of protection of the present invention.
Claims (6)
1. a kind of high-entropy alloy reinforced aluminum matrix composites, which is characterized in that using aluminium alloy as matrix, high-entropy alloy is enhancing
Phase, high-entropy alloy are the high-entropy alloy powder with body-centered cubic structure.
2. a kind of high-entropy alloy reinforced aluminum matrix composites according to claim 1, which is characterized in that the high-entropy alloy
The body center cubic solid solution generated according to atomic ratio for each alloy compositions（BCC）Alloy system；In high-entropy alloy, Al, Fe, Cr,
Co, Ni, Cu, Ti metal powder purity>99.9%, granularity≤45 μm.
3. a kind of high-entropy alloy reinforced aluminum matrix composites according to claim 1, which is characterized in that the matrix is
Al alloy powder, the purity of the Al alloy powder>99.9%, granularity≤300 μm.
4. a kind of high-entropy alloy reinforced aluminum matrix composites according to claim 1, which is characterized in that in composite material,
The mass content of high-entropy alloy is 10-40wt%, and the mass content of aluminium alloy powder is 60-90wt%.
5. a kind of preparation method of high-entropy alloy reinforced aluminum matrix composites according to claim 1, which is characterized in that packet
Include following steps：
Raw material selects：Al, Fe, Cr, Co, Ni, Cu, Ti metal powder purity>99.9%, granularity≤45 μm；Al alloy powder it is pure
Degree>99.9%, granularity≤300 μm；Weigh each metal powder；
Load weighted metal powder is placed in stainless-steel vacuum grinding jar, inert gas is filled with after vacuumizing, in high energy ball mill
Middle carry out mechanical alloying, dry grind 300 ~ 500r/min of rotating speed, and the dry grinding time is 40 ~ 50h, 2 ~ 5h of wet-milling time, wet-milling rotating speed
For 100 ~ 300r/min；First dry grind, rear wet-milling；After wet-milling, vacuum tank is opened, after being dried in vacuo 24 ~ 36h, through 50 ~ 100r/min
1 ~ 2h of ball milling, is prepared high-entropy alloy powder；
It is prepared by composite material powder：Step 2）Load weighted aluminium alloy powder in proportion is added in obtained high-entropy alloy powder,
By the mechanical mixture 3-5h of 150 ~ 200r/min, composite material powder is prepared；In composite material powder, the quality of high-entropy alloy
Content is 10-40wt%, and the mass content of aluminium alloy powder is 60-90wt%；
It is hot-pressed：Composite material fission is cold-pressed to obtain ingot blank, then carries out hot extrusion, extruding temperature is 400-
600 DEG C, extrusion ratio 10-15, finally obtain the aluminum matrix composite of high-entropy alloy enhancing.
6. a kind of preparation method of high-entropy alloy reinforced aluminum matrix composites according to claim 5, which is characterized in that institute
State the purity of Al, Fe, Cr, Co, Ni, Cu, Ti metal powder>99.9%, granularity≤45 μm；The μ of the Al alloy powder granularity≤200
m。
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109338172A (en) * | 2018-12-11 | 2019-02-15 | 西安工业大学 | A kind of 2024 aluminum matrix composites and preparation method thereof of high-entropy alloy enhancing |
| CN110284032A (en) * | 2019-07-17 | 2019-09-27 | 哈尔滨理工大学 | A kind of high-entropy alloy particle reinforced magnesium base compound material preparation method |
| CN110523997A (en) * | 2019-08-19 | 2019-12-03 | 江苏大学 | A kind of subzero treatment aluminum matrix composite and preparation method thereof of high-entropy alloy particle enhancing |
| CN110576185A (en) * | 2019-09-19 | 2019-12-17 | 上海交通大学 | Nanocrystalline high-entropy alloy powder and preparation method thereof |
| CN110747380A (en) * | 2019-12-10 | 2020-02-04 | 西南交通大学 | Nano ceramic particle reinforced aluminum matrix composite material and preparation method thereof |
| CN111394667A (en) * | 2020-03-25 | 2020-07-10 | 江苏大学 | Regulation (FeCoNiCrAlCu)pMethod for interface of/2024A 1 composite material |
| CN112899531A (en) * | 2021-01-19 | 2021-06-04 | 江苏大学 | High-entropy alloy particle reinforced aluminum-based composite material and magnetic field auxiliary preparation method |
| CN113046590A (en) * | 2021-02-04 | 2021-06-29 | 江苏大学 | High-entropy alloy/aluminum composite foam type wave-absorbing material and preparation method thereof |
| CN113088730A (en) * | 2021-03-26 | 2021-07-09 | 上海应用技术大学 | High-thermal-conductivity high-strength particle-reinforced cast aluminum alloy and preparation method thereof |
| CN114309625A (en) * | 2021-12-31 | 2022-04-12 | 河南科技大学 | Preparation method and product of high-entropy alloy reinforced aluminum matrix composite |
| WO2024001288A1 (en) * | 2022-06-30 | 2024-01-04 | 江苏大学 | Compound-strengthened, heat-resistant and wear-resistant aluminum alloy and preparation method therefor |
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Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109338172A (en) * | 2018-12-11 | 2019-02-15 | 西安工业大学 | A kind of 2024 aluminum matrix composites and preparation method thereof of high-entropy alloy enhancing |
| CN110284032A (en) * | 2019-07-17 | 2019-09-27 | 哈尔滨理工大学 | A kind of high-entropy alloy particle reinforced magnesium base compound material preparation method |
| CN110284032B (en) * | 2019-07-17 | 2021-01-01 | 哈尔滨理工大学 | Preparation method of high-entropy alloy particle reinforced magnesium-based composite material |
| CN110523997A (en) * | 2019-08-19 | 2019-12-03 | 江苏大学 | A kind of subzero treatment aluminum matrix composite and preparation method thereof of high-entropy alloy particle enhancing |
| CN110523997B (en) * | 2019-08-19 | 2022-05-20 | 江苏大学 | High-entropy alloy particle reinforced subzero treatment aluminum-based composite material and preparation method thereof |
| CN110576185A (en) * | 2019-09-19 | 2019-12-17 | 上海交通大学 | Nanocrystalline high-entropy alloy powder and preparation method thereof |
| CN110747380A (en) * | 2019-12-10 | 2020-02-04 | 西南交通大学 | Nano ceramic particle reinforced aluminum matrix composite material and preparation method thereof |
| CN111394667A (en) * | 2020-03-25 | 2020-07-10 | 江苏大学 | Regulation (FeCoNiCrAlCu)pMethod for interface of/2024A 1 composite material |
| CN111394667B (en) * | 2020-03-25 | 2021-09-10 | 江苏大学 | Regulation (FeCoNiCrAlCu)pMethod for interface of/2024A 1 composite material |
| CN112899531B (en) * | 2021-01-19 | 2021-11-23 | 江苏大学 | High-entropy alloy particle reinforced aluminum-based composite material and magnetic field auxiliary preparation method |
| CN112899531A (en) * | 2021-01-19 | 2021-06-04 | 江苏大学 | High-entropy alloy particle reinforced aluminum-based composite material and magnetic field auxiliary preparation method |
| CN113046590A (en) * | 2021-02-04 | 2021-06-29 | 江苏大学 | High-entropy alloy/aluminum composite foam type wave-absorbing material and preparation method thereof |
| CN113046590B (en) * | 2021-02-04 | 2022-05-20 | 江苏大学 | High-entropy alloy/aluminum composite foam type wave-absorbing material and preparation method thereof |
| CN113088730A (en) * | 2021-03-26 | 2021-07-09 | 上海应用技术大学 | High-thermal-conductivity high-strength particle-reinforced cast aluminum alloy and preparation method thereof |
| CN114309625A (en) * | 2021-12-31 | 2022-04-12 | 河南科技大学 | Preparation method and product of high-entropy alloy reinforced aluminum matrix composite |
| WO2024001288A1 (en) * | 2022-06-30 | 2024-01-04 | 江苏大学 | Compound-strengthened, heat-resistant and wear-resistant aluminum alloy and preparation method therefor |
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