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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
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are practical application problems such as low hardness and poor wear resistance.

Method used

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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

Embodiment 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 it 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 cooling to room temperature naturally, the obtained samples are respectively designated as samples A1-A7.

[0036] Table 1 Raw materials, proportions, mixing methods and sintering conditions

[0037]

Embodiment 2

[0043] The samples A1-A7 obtained in Example 1 and the samples D1 and D2 obtained in Comparative Examples 1 and 2 were taken out and cut, and ground and polished to obtain gray cubic blocks. Test its Vickers hardness, see Table 2. Directly punch with electric drill press, the photo after the sample A1 punching that embodiment 1 obtains sees 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 to A7 are the same as those of sample A1 figure 1 unanimous.

[0044]The sample D1 obtained in Comparative Example 1 can be directly drilled with an electric drill, but due to its low hardness, damage occurred during the drilling process, indicating that the hardness of the material obtained by sintering only MAX phase materials does not meet the requirements for machinability.

[0045] The sample D2 obtained in Comparative Example 2 suffered brittle cracks in the process of directly drilling w...

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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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