In-situ SiC-TiC particle mixing enhanced aluminum-based composite material and preparation process thereof

A composite material and a technology for reinforced aluminum matrix, which is applied in the field of in-situ SiC-TiC particle mixed reinforced aluminum matrix composite material and its preparation to achieve the effect of strong interface bonding and good wettability

Active Publication Date: 2013-01-30
XIAN TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The present invention is to provide an in-situ SiC-TiC particle mixed reinforced aluminum matrix composite material and its preparation process, to overcome the high preparation cost and technical problems existing in the prior art Complexity, poor wettability and compatibility between particles and matrix

Method used

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  • In-situ SiC-TiC particle mixing enhanced aluminum-based composite material and preparation process thereof
  • In-situ SiC-TiC particle mixing enhanced aluminum-based composite material and preparation process thereof
  • In-situ SiC-TiC particle mixing enhanced aluminum-based composite material and preparation process thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0028] Grind and mix silicon powder (99% purity, 200 mesh) and graphite powder (99% purity, 200 mesh) with a molar ratio of 1 in a mortar; titanium powder (99% pure, 200 mesh) with a molar ratio of 1 ) and graphite powder (99% purity, 200 mesh) were ground and mixed evenly in a mortar. see figure 1 , put the two mixed powders into a mold with a diameter of 35 mm. The mixture of titanium powder and graphite powder is used as the outer layer of the briquette, and the mixture of silicon powder and graphite powder is used as the inner layer of the briquette. The mass ratio of the outer layer to the inner layer is 3:10 (make the mixture of silicon powder and graphite powder in the middle, surrounded by a mixture of titanium powder and graphite powder). The briquettes are pressed on a press. The pressure is 20MPa, and the holding time is 5 minutes. After pressing, the briquette is taken out from the mold and put into a drying oven to dry.

[0029] Select pure Al ingots and Al-5...

Embodiment 2

[0032] Grind and mix silicon powder (99% purity, 200 mesh) and graphite powder (99% purity, 200 mesh) with a molar ratio of 1 in a mortar; titanium powder (99% pure, 200 mesh) with a molar ratio of 1 ) and graphite powder (99% purity, 200 mesh) were ground and mixed evenly in a mortar. Put the two mixed powders into a mold with a diameter of 35 mm. The mixture of titanium powder and graphite powder is used as the outer layer of the compact, and the mixture of silicon powder and graphite powder is used as the inner layer of the compact. The mass ratio of the outer layer to the inner layer is 3 : 10 (make the mixture of silicon powder and graphite powder in the middle, surrounded by a mixture of titanium powder and graphite powder). The briquettes are pressed on a press. The pressure is 20MPa, and the holding time is 5 minutes. After pressing, the briquette is taken out from the mold and put into a drying oven to dry. Select pure Al ingots and Al-50%Cu intermediate alloy ingo...

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Abstract

The invention relates to the technical field of non-continuous enhanced metal-based composite materials, and in particular relates to an in-situ SiC-TiC particle mixing enhanced aluminum-based composite material and a preparation process thereof. For overcoming the defects of high preparation cost, complicated process and poor wettability and compatibility of particles and substrates in the prior art, the invention provides the in-situ SiC-TiC particle mixing enhanced aluminum-based composite material and the preparation process thereof. The preparation process comprises the following steps: firstly, preparing in-situ reaction system press cakes: dividing the designed press cakes into inner and outer layers, wherein the mass ratio of the inner layer to the outer layer is 3:10, and then pressing by a pressure machine; then, preparing Al-4.5Cu based alloy by taking pure Al and Al-50% Cu as raw materials; and finally adding the press cakes in Al-4.5Cu melt to carry out in-situ reaction. Compared with the prior art, the preparation method disclosed by the invention has the advantages that the in-situ produced SiC particles are fine and reach micron scale.

Description

Technical field: [0001] The invention relates to the technical field of discontinuously reinforced metal matrix composite materials, in particular to an in-situ SiC-TiC particle mixed reinforced aluminum matrix composite material and a preparation process thereof. Background technique: [0002] SiC particle reinforced aluminum matrix (SiC p / Al ) composite material is a kind of discontinuously reinforced metal matrix composite material which has developed the fastest and has the widest application prospect in the world in the last two decades. The composite material has excellent mechanical and physical properties such as high specific strength, high specific modulus, high temperature resistance, wear resistance, and good dimensional stability, and has the advantage of isotropy, so it is considered to be an ideal lightweight structural material. , especially in key products such as motor vehicle engine pistons, cylinder heads, and cylinder blocks, and in the aviation indu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/10C22C21/00
Inventor 梁艳峰董晟全李高宏杨通
Owner XIAN TECH UNIV
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