Silicon carbide matrix composite and preparation method thereof

A composite material and silicon carbide-based technology, applied in the field of material science, can solve problems such as poor wear resistance and low hardness, and achieve the effects of low preparation cost, simple and easy-to-obtain raw materials, and good machinability

Inactive Publication Date: 2017-03-22
FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI +1
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  • Abstract
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  • Application Information

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Problems solved by technology

However, there are practical application problem

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  • Silicon carbide matrix composite and preparation method thereof
  • Silicon carbide matrix composite and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0034] Example 1

[0035] Mix the MAX phase material powder and SiC powder according to the raw materials, proportions and mixing methods in Table 1, and fill them into a graphite hot pressing mold or a dry pressing mold to obtain a disc-shaped green body. Under the sintering conditions in Table 1, After sintering and natural cooling to room temperature, the samples obtained are marked as samples A1 to A7.

[0036] Table 1 Raw materials, ratio, mixing method and sintering conditions

[0037]

Example Embodiment

[0042] Example 2

[0043] The samples A1 to A7 obtained in Example 1 and the samples D1 and D2 obtained in Comparative Example 1 and Comparative Example 2 were taken out, cut, and ground and polished to obtain gray cubic blocks. Test its Vickers hardness, see Table 2. Drill directly with an electric drilling machine, see the picture of sample A1 obtained in Example 1 after drilling figure 1 , It can be seen that it has good machining performance, and the drilling surface is smooth and flat. The drilling results of samples A2~A7 are the same as those of sample A1 figure 1 Consistent.

[0044] The sample D1 obtained in Comparative Example 1 can be directly punched with an electric drilling machine, but due to its low hardness, damage occurs during the drilling process, indicating that the hardness of the material obtained by sintering only the MAX phase material does not meet the requirements of machining performance.

[0045] The sample D2 obtained in Comparative Example 2 suffered ...

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Abstract

The invention discloses a preparation method of an easy processing silicon carbide matrix composite. The method comprises the step that raw materials containing a MAX-phase material and silicon carbide are fired in an inert atmosphere, and the silicon carbide matrix composite is obtained. The preparation method is simple in process, and the ceramic matrix composite which has the high hardness, the wear resistance and the good processing property is obtained. The invention further discloses the easy processing silicon carbide matrix composite obtained through the method.

Description

technical field [0001] The invention relates to a method for preparing a silicon carbide composite material, belonging to the field of material science and technology Background technique [0002] Silicon carbide SiC material is a kind of structural ceramic with excellent performance. It has excellent characteristics such as high temperature strength, good wear resistance, good thermal stability, high thermal conductivity and chemical corrosion resistance. It is widely used in bulletproof and anti-stab clothing, rockets Combustion chamber lining, high-speed pneumatic bearings, mechanical seal parts, lightweight space mirrors and other high-tech fields. Silicon carbide-based ceramic composite materials have better neutronic characteristics, physical and chemical properties, and high-temperature structural strength than alloy materials. They are among the best candidate materials for new nuclear fuel cladding, accident-tolerant fuel elements, and structural components in high-...

Claims

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Application Information

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IPC IPC(8): C04B35/56C04B35/565C04B35/622
CPCC04B35/56C04B35/622C04B2235/3817C04B2235/3826C04B2235/5436C04B2235/5445C04B2235/96
Inventor 周有福王志光王坤
Owner FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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