Two-phase composite material and preparation method thereof

A composite material and powder technology, which is applied in the field of two-phase composite materials and the preparation of two-phase composite materials, can solve the problems of poor weldability, difficult hardness, high production cost, etc., and achieve outstanding comprehensive performance, good weldability, The effect of improving overall performance

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] Aiming at the problems that the existing aluminum silicon carbide materials have poor weldability, high hardness, difficult processing, and high production cost, the present invention provides a material that combines the advantages of aluminum silicon carbide and aluminum silicon with high thermal conductivity and low expansion coefficient. Adjustable, low density, good strength, good weldability two-phase composite material, and the two-phase composite material prepared by the preparation method

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] This embodiment provides a method for preparing a two-phase composite material. The specific form of the two-phase composite material is a shell. The shell is composed of a shell shell and a shell cover. The hot die-casting used in the preparation process The mold includes a first shell hot die casting mold and a second shell hot die casting mold for preparing the shell shell, and a first cover hot die casting mold and a second cover hot die casting mold for making the shell cover .

[0040]First, use the first shell hot die casting mold to obtain the green body M5 used to prepare the shell shell, and then continue to use the second shell hot die casting mold to form the green body M5 corresponding to the shell shell. Bisque M6. Similarly, the preparation of the green body M6 corresponding to the shell cover plate is the same as the above method, that is, firstly use the first cover plate to form the green body M5 used to prepare the shell cover plate by hot die castin...

Embodiment 2

[0058] This embodiment provides a preparation method of a two-phase composite material and the two-phase composite material prepared by the preparation method. The specific presentation form of the two-phase composite material is the same tube shell as in Example 1, and the hot-press casting mold used in the preparation process is the same as the first shell hot-press casting mold and the second shell hot-press casting mold described in Example 1. 1. The hot pressing mold for the first cover plate is the same as the hot pressing mold for the second cover plate. The preparation method of this example is basically the same as the preparation method of Example 1, the difference lies in the wax removal temperature and sintering temperature in step 7, the wax removal temperature in step 7 of this embodiment is 220°C, and the sintering temperature is 1350°C .

Embodiment 3

[0060] This embodiment provides a preparation method of a two-phase composite material and the two-phase composite material prepared by the preparation method. The specific presentation form of the two-phase composite material is the same tube shell as in Example 1, and the hot-press casting mold used in the preparation process is the same as the first shell hot-press casting mold and the second shell hot-press casting mold described in Example 1. 1. The hot pressing mold for the first cover plate is the same as the hot pressing mold for the second cover plate. The preparation method of this example is basically the same as the preparation method of Example 1, the difference lies in the composition ratio of the slurry M3 prepared in step 3, and the mass percentage of each component in the slurry M3 prepared in step 3 of this example They are: powder M1 75%, paraffin wax 22%, beeswax 2%, oleic acid 1%.

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Abstract

The invention relates to the technical field of composite materials, and in particular relates to a preparation method of a two-phase composite material, and the two-phase composite material prepared by the preparation method. According to the method provided by the invention, firstly a silicon carbide ceramic biscuit M5 is prepared by using powder formed by silicon carbide powder with different particle sizes and wax slurry, the silicon carbide ceramic biscuit M5 is used as a part of a mold, a silicon ceramic biscuit M6 is prepared by means of hot press casting, the two biscuits are combined in the form of wax diffusion, demolding is performed, sintering is performed to obtain a ceramic substrate M7, and finally an aluminum alloy melt is infiltrated into the ceramic substrate M7 to form the two-phase composite material; and the two-phase composite material combines the advantages of aluminum silicon carbide and aluminum silicon in one, and has high thermal conductivity, an adjustable expansion coefficient, a low density, good strength and good weldability, the airtightness of the product after welding is less than 10<-10>Pa*m<3>/s, and the composite material is the best choice of a high-power package type tube shell.

Description

technical field [0001] The invention relates to the technical field of composite materials, in particular to a preparation method of a two-phase composite material and the two-phase composite 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. Silicon carbide reinforced aluminum matrix composites are widely used in the fi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/569C04B35/634C04B35/622C04B35/58C04B41/88B22D23/04
CPCB22D23/04C04B35/565C04B35/58085C04B35/622C04B35/63496C04B41/5155C04B41/88C04B2235/3217C04B2235/428C04B2235/5436C04B2235/656C04B2235/96C04B2235/9607C04B41/4523
Inventor 刘昌涛陈燕
Owner 西安明科微电子材料有限公司
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