Mg alloy/Al2O3 composite and preparation method thereof

A composite material and alloy technology, which is applied in the field of Mg alloy/Al2O3 composite material and its preparation, can solve the problems of inability to achieve metal and ceramic wetting, serious alloy powdering, and inappropriate use of nitrogen-containing atmosphere.

Inactive Publication Date: 2016-04-20
JILIN UNIV
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Problems solved by technology

But for Mg alloys, since Mg and N 2 A large number of reactions will generate Mg 3 N 2 phase, resulting in severe powdering of the alloy and high brittleness, so it is not suitable to use a nitrogen-

Method used

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  • Mg alloy/Al2O3 composite and preparation method thereof
  • Mg alloy/Al2O3 composite and preparation method thereof
  • Mg alloy/Al2O3 composite and preparation method thereof

Examples

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Example Embodiment

[0023] The present invention will be further elaborated by the following examples.

[0024] Mg alloy / Al of the present invention 2 O 3 Preparation of composite materials:

[0025] 1. Water-based Al 2 O 3 Preparation of slurry

[0026] Dissolve the dispersant polysodium methacrylate in an aqueous solution at 40 °C, and then mix with Al 2 O 3 The powder is mixed, and the ceramic slurry is made by ball milling with a planetary ball mill with a rotational speed of 100 r / min for 6 hours. 2 O 3 The volume percentage of powder in the whole slurry is 10-40vol.%, and the dispersant content is Al 2 O 3 1 wt.% of the powder, the ball-milled slurry was vacuum-stirred and degassed for 20 min, and the stirring speed was 80-100 r / min to obtain water-based Al with a particle size of less than 5 μm 2 O 3 slurry.

[0027] 2. Directional solidification

[0028] Put the above water-based Al 2 O 3 The slurry is injected into a polytetrafluoroethylene mold, and directional solidifica...

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Abstract

The invention relates to an Mg alloy/Al2O3 composite light in weight and high in strength, in particular to an Mg alloy/Al2O3 composite and a preparation method thereof. The Mg alloy/Al2O3 composite is composed of a lamellar structure Al2O3 substrate prepared by an ice template method and Mg alloy composited in lamellar spacing of the substrate by impregnation, and is obtained by soaking in a silica sol a lamellar structure Al2O3 base made by ice template oriented solidification so that nano SiO2 covers the surface of Al2O3 lamellas, and carrying Mg alloy impregnation in Ar atmosphere. This composite has high specific strength and has compressive strength up to 697 MPa when its density is 2.57 g/cm<3>.

Description

technical field [0001] The invention relates to light weight and high strength metal / ceramic composite material, especially a kind of Mg alloy / Al 2 o 3 Composite materials and methods for their preparation. Background technique [0002] With the development of science and technology, lightweight and high-strength materials are bound to become the development trend in the fields of aerospace, automobile industry and bulletproof armor. Mg alloy has the smallest density among metal materials, which is about 2 / 3 of that of Al alloy, so it becomes the first choice for light structural materials. However, the strength of Mg alloy is low, so it is necessary to increase its strength by compounding and other methods. Ceramic materials have high strength but poor plasticity. Combining the two to obtain a lightweight and high-strength structural material can meet the application requirements. But how to effectively compound is the key factor to determine the performance of Mg allo...

Claims

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Application Information

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IPC IPC(8): C22C1/10C22C23/00C22C32/00
CPCC22C1/1015C22C1/1036C22C23/00C22C32/0036C22C1/1021C22C1/1057
Inventor 沈平刘艳郭瑞芬张恒阿拉腾沙嘎付玉洁姜启川
Owner JILIN UNIV
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