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AlSiC/AlSi two-phase material and preparation method thereof

A powder and billet technology, applied in ceramic products, other household utensils, applications, etc., can solve the problems of difficult hardness and high production cost, and achieve the effect of improving comprehensive performance, low density, and adjustable expansion coefficient

Inactive Publication Date: 2019-09-24
西安明科微电子材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention aims at the disadvantages of the existing aluminum-based silicon carbide materials, such as high hardness, difficult processing and high production cost, and provides an aluminum silicon carbide and aluminum silicon carbide with advantages of high thermal conductivity, adjustable expansion coefficient, low density, AlSiC / AlSi two-phase material with good strength, and preparation method of said AlSiC / AlSi two-phase material

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] This embodiment provides a method for preparing an AlSiC / AlSi two-phase material, and the AlSiC / AlSi two-phase material prepared by the preparation method. The preparation method comprises the following steps (the following percentages all refer to mass percent):

[0036] 1. Mix silicon carbide powders with particle sizes of 4-5 μm, 30-35 μm, 50-60 μm, and 80-90 μm evenly according to the mass ratio of 1:2:1:2 to obtain powder M1.

[0037] 2. Add γ-alumina, kaolin, and Suzhou soil to the powder M1, wherein the content of the powder M1 is 90%, the content of γ-alumina is 4%, the content of kaolin is 3%, and the content of Suzhou soil is 3%, and mix evenly to obtain Mixture M2.

[0038] 3. Prepare a solution M3 with a mass percentage concentration of 10% of the solute, wherein the solute is composed of the following components by mass percentage: sodium hydroxymethylpropyl cellulose 5%, polyvinyl alcohol 80%, cetyl tris Methyl ammonium bromide 5%, tributyl phosphate 10%...

Embodiment 2

[0047] This embodiment provides a method for preparing an AlSiC / AlSi two-phase material, and the AlSiC / AlSi two-phase material prepared by the preparation method. The preparation method of this example is basically the same as that of Example 1, except that in step 5, step 5 of this example is: put the green body M5 into a tunnel kiln for sintering, and set the temperature of the debinding area to 300 °C, the temperature of the sintering zone is 1350 °C, and the ceramic matrix M6 is obtained after the sintering is completed.

Embodiment 3

[0049] This embodiment provides a method for preparing an AlSiC / AlSi two-phase material, and the AlSiC / AlSi two-phase material prepared by the preparation method. The preparation method of this example is basically the same as the preparation method of Example 1, except that in step 6, step 6 of this example is: the silicon powder with a particle size of 4-6um and 50-60um respectively is prepared according to the mass ratio Mix evenly at a ratio of 3:1, and then add it to the wax slurry that has been melted uniformly in advance, including 75% silicon powder, 22% paraffin wax, 2% beeswax, and 1% oleic acid. The whole is recorded as silicone wax slurry M7.

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Abstract

The invention relates to the technical field of composite materials, and in particular relates to a preparation method of an AlSiC / AlSi two-phase material, and the AlSiC / AlSi two-phase material prepared by the preparation method. According to the method provided by the invention, firstly a porous silicon carbide ceramic substrate M6 is prepared by using powder formed by silicon carbide powder with different particle sizes, aluminum oxide, kaolin and Suzhou soil, a ceramic substrate M9 with combined silicon and silicon carbide surface layer diffusion is prepared from silicon wax slurry M7 containing silicon powder with different particle sizes on the basis of the ceramic substrate M6, and finally aluminum is infiltrated into the ceramic substrate M9 to form the composite material having two phases of AlSiC and AlSi; and the composite material combines the advantages of the AlSiC and the AlSi in one, and has the advantages of high thermal conductivity, an adjustable expansion coefficient, a low density and good strength.

Description

technical field [0001] The invention relates to the technical field of composite materials, in particular to a preparation method of an AlSiC / AlSi two-phase material and the AlSiC / AlSi two-phase material prepared by the preparation method. Background technique [0002] Silicon carbide reinforced aluminum matrix composites have excellent mechanical and thermophysical properties such as high thermal conductivity, adjustable thermal expansion coefficient, high specific strength and specific stiffness, wear resistance, fatigue resistance, low density and good dimensional stability. These properties can make The silicon carbide-reinforced aluminum-based composite package matches the thermal expansion coefficient of the chip and plays a good role in heat conduction, thereby solving the problem of thermal failure of the circuit and improving the reliability and stability of components. material of choice. At present, there are many research reports on aluminum-based silicon carbid...

Claims

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Application Information

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IPC IPC(8): C04B35/565C04B41/85C04B38/06C22C1/10C22C1/02
CPCC04B35/565C04B41/85C04B41/5096C04B38/0645C22C1/1015C22C1/1036C04B2235/349C04B2235/322C22C1/1021C22C1/1073C04B41/4539
Inventor 刘昌涛陈燕
Owner 西安明科微电子材料有限公司
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