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Preparation method of aluminum-based ceramic composite material

A technology of composite materials and aluminum-based ceramics, applied in the field of metal composite materials, can solve problems such as low density, low thermal expansion coefficient, and immature technology, and achieve the effect of increasing compactness

Inactive Publication Date: 2018-08-24
西安朗赛精密机械有限公司
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0002] Aluminum-based ceramics (such as Al / SiC, Al / Si 3 N 4 , Al / Al 2 o 3 etc.) Composite materials are used because of their excellent mechanical and physical properties such as high specific strength and specific stiffness, low thermal expansion coefficient, low density, high micro-yield strength, good dimensional stability, thermal conductivity, wear resistance and fatigue resistance, etc. It is used in electronic packaging component materials and aerospace equipment, but there are various difficulties in its preparation, and the technology is not yet mature

Method used

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  • Preparation method of aluminum-based ceramic composite material
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preparation example Construction

[0027] A kind of preparation method of aluminum-based ceramic composite material of the present invention, concrete steps are as follows:

[0028] S1. Using vacuum pressureless impregnation, first place the aluminum ingot 4 in the upper chamber 3 of the furnace, then place the porous ceramic blank 6 in the lower chamber 5 to closely fit the inner wall of the furnace chamber, and then close the manual valve to close the sintering furnace To ensure its airtightness, open the rough pumping valve to vacuumize for 10-15 minutes, then open the vacuum valve and molecular pump until the vacuum degree reaches 0.008-0.01Pa;

[0029] The rough pumping valve and the molecular pump of the vacuum valve are mutually cut off. When the rough pumping valve is opened, the molecular pump of the vacuum valve is closed. When the vacuum valve and the molecular pump are opened, the rough pumping valve is closed.

[0030] The diameter of the aluminum ingot 4 is 5-600mm, and the height is 50-55mm.

[...

Embodiment

[0035] Such as figure 1 As mentioned above, the preparation equipment of this embodiment is a vacuum hot-press sintering furnace, wherein the sealing equipment includes an upper pressure head 1, a graphite tube 2, a graphite backing plate 5; an aluminum ingot 3 for impregnation, and a product mold 4. Among them, the SiC preform The size is 1~500mm in length, 1~500mm in width, and 1~1000mm in height, according to figure 1 way equipped.

[0036] The preparation steps of aluminum-based ceramic materials are as follows:

[0037] Step S1, first place the aluminum ingot in the upper chamber of the furnace, then place the porous ceramic blank in the lower chamber of the furnace to closely adhere to the inner wall of the furnace chamber, then close the manual valve to close the sintering furnace, and open the roughing valve for 10 to 15 minutes Then open the molecular pump and vacuum valve for 1-1.5 hours to a vacuum degree of 0.008-0.01;

[0038] Step S2, when the vacuum degree re...

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Abstract

The invention discloses a preparation method of an aluminum-based ceramic composite material. A porous ceramic blank is placed into a lower cavity of a hearth, an aluminum ingot is placed into an upper cavity of the hearth, vacuum heat injection squeezing-infiltration is performed, a sintering furnace is closed after infiltration, vacuum is pumped and kept, temperature is kept after one-time temperature rise, a manual valve is opened, inert gas is injected, infiltration is finished under atmospheric pressure, and finally, furnace cooling is performed to reach room temperature after infiltration to prepare the aluminum-based ceramic composite material. By vacuum heat injection squeezing sintering, the aluminum-based ceramic composite material is successfully prepared, the prepared aluminum-based ceramic composite material meets strength requirements and machining requirements, and the preparation method is simple in process, easy in operation and suitable for manufacturing parts needinglight weight, good conductivity, high strength and high temperature resistance.

Description

technical field [0001] The invention belongs to the technical field of metal composite materials, and in particular relates to a preparation method of aluminum-based ceramic composite materials. Background technique [0002] Aluminum-based ceramics (such as Al / SiC, Al / Si 3 N 4 , Al / Al 2 o 3 etc.) Composite materials are used because of their excellent mechanical and physical properties such as high specific strength and specific stiffness, low thermal expansion coefficient, low density, high micro-yield strength, good dimensional stability, thermal conductivity, wear resistance and fatigue resistance, etc. It is used in electronic packaging component materials and aerospace equipment, but there are various difficulties in its preparation, and the technology is not yet mature. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a method for preparing an aluminum-based ceramic composite material, which is simple an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/10
CPCC22C1/1036
Inventor 刘波波何娟
Owner 西安朗赛精密机械有限公司
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