A kind of high volume fraction sic/cu particle reinforced al-based metal composite material and its preparation method

A high volume fraction, particle reinforced technology, applied in the field of high volume fraction SiC/Cu particle reinforced Al-based metal composites and their preparation, to achieve the effect of improving density, increasing surface energy, and high mixing efficiency

Active Publication Date: 2021-04-30
珠海亿特立新材料有限公司
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  • Abstract
  • Description
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Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a high volume fraction SiC / Cu particle-reinforced Al-based metal composite material and its preparation method in view of the deficiencies in the above-mentioned prior art. Silicon nanopowder is easy to agglomerate in the metal matrix, and at the same time increases the volume fraction of ceramic powder in the metal matrix. The resulting product has high density and high thermal conductivity. The method is simple and easy to operate industrially, and has great commercial value.

Method used

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  • A kind of high volume fraction sic/cu particle reinforced al-based metal composite material and its preparation method
  • A kind of high volume fraction sic/cu particle reinforced al-based metal composite material and its preparation method
  • A kind of high volume fraction sic/cu particle reinforced al-based metal composite material and its preparation method

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preparation example Construction

[0034] A method for preparing a high volume fraction SiC / Cu particle reinforced Al-based metal composite material of the present invention comprises the following steps:

[0035] S1. Disperse silicon carbide powder with a particle size of 50-100nm in anhydrous ethanol by ultrasonic-assisted stirring, then add Al powder with a particle size of 5-10μm and a solid content of 95%-97% for rolling ball milling at a revolution speed of 2000~ 2500r / min, rotation rate 800-1000r / min, stirring for 3-5min, then vacuum-evaporate ethanol for 1-3min, then vacuum-dry at 60-80°C for 1-2h to obtain surface-modified aluminum powder;

[0036] S2. Mix the modified aluminum powder obtained in step S1 with submicron silicon carbide powder of 500nm to 1 μm and copper powder of 1 to 2 μm, and dry-mix at a speed of 200 to 500 r / min for 5 to 6 hours, wherein the submicron The content of high-grade silicon carbide is 10% to 30%, the content of copper is 20% to 30%, and the diameter of the grinding ball i...

Embodiment 1

[0042] S1. Disperse silicon carbide powder with a particle size of 50nm in absolute ethanol by ultrasonic-assisted stirring, then add Al powder with a particle size of 5 μm and a solid content of 95% for rolling ball milling, with a revolution speed of 2000r / min and a rotation speed of 800r / min , after stirring for 3 minutes, vacuum-evaporating ethanol for 1 minute, and then vacuum-drying at 60°C for 1 hour to obtain surface-modified aluminum powder;

[0043] S2. Mix the modified aluminum powder obtained in step S1 with 500nm submicron silicon carbide powder and 1 μm copper powder, and dry mix at a speed of 200r / min for 5 hours, wherein the content of submicron silicon carbide is 10%. , the content of copper is 20%, the diameter of the ball is 5mm;

[0044] S3. Press the uniformly mixed powder in step S2 with cold isostatic pressing at a pressure of 200 MPa to obtain a composite material blank, and then perform vacuum calcination to obtain a dense composite material at a tempe...

Embodiment 2

[0047] S1. Disperse silicon carbide powder with a particle size of 70nm in absolute ethanol by ultrasonic-assisted stirring, then add Al powder with a particle size of 7 μm and a solid content of 95% for rolling ball milling, with a revolution speed of 2200r / min and a rotation speed of 850r / min , after stirring for 3 minutes, vacuum-evaporating ethanol for 1 minute, and then vacuum-drying at 65° C. for 1 hour to obtain surface-modified aluminum powder;

[0048] S2. Mix the modified aluminum powder obtained in step S1 with 700nm submicron silicon carbide powder and 1 μm copper powder, and dry mix at a speed of 250r / min for 5 hours, wherein the content of submicron silicon carbide is 15%. , the content of copper is 22%, and the diameter of the grinding ball is 5mm;

[0049] S3. Press the uniformly mixed powder in step S2 with cold isostatic pressing at a pressure of 240 MPa to obtain a composite material blank, and then perform vacuum calcination to obtain a dense composite mate...

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Abstract

The invention discloses a high-volume-fraction SiC / Cu particle-reinforced Al-based metal composite material and a preparation method thereof. Nano-scale silicon carbide powder is dispersed in absolute ethanol through ultrasonic-assisted stirring, and then micron-scale Al powder is added for rolling. Ball milling, vacuum evaporation of ethanol, and vacuum drying to obtain surface-modified aluminum powder; dry-mix the obtained modified aluminum powder with submicron silicon carbide powder and copper powder; use the uniformly mixed powder Cold isostatic pressing method to obtain composite material blank, followed by vacuum calcination to obtain dense composite material; maintain vacuum or cool to room temperature at a cooling rate of 1-3°C / min under nitrogen atmosphere to obtain SiC / Cu particle-reinforced Al base composite material. The product obtained by the invention has high density and high thermal conductivity, the method is simple and easy for industrial operation, and has great commercial value.

Description

technical field [0001] The invention belongs to the technical field of preparation of metal-based ceramic composite materials, and in particular relates to a high volume fraction SiC / Cu particle-reinforced Al-based metal composite material and a preparation method thereof. Background technique [0002] Metal matrix composites reinforced with ceramic particles have excellent properties such as light density, high mechanical strength and controllable thermal properties, and have great application value in the fields of aerospace, automation and national defense. Due to the strong non-wetability between the metal matrix and the metal matrix, it is very difficult to uniformly disperse high volume fraction ceramic particles in the metal matrix, especially for nano-ceramic powders, the technical difficulty is even greater. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a high volume fraction SiC / Cu particle-reinforced...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C21/00C22C32/00C22C1/05
CPCC22C1/05C22C21/00C22C32/0063
Inventor 景文甲何娟刘磊
Owner 珠海亿特立新材料有限公司
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