Zirconium diboride/silicon carbide composite material and method for preparing same by means of arc melting in-suit reaction

A technology of zirconium diboride and composite materials, which is applied in the field of ceramic materials, can solve the problems of difficulty in preparing dense zirconium diboride/silicon carbide composite materials, adverse effects on the performance of composite materials, and difficulty in the diffusion process. Controllable microstructure, good industrialization prospects, and the effect of increasing material density and crack growth resistance
CN102633504AInactive Publication Date: 2012-08-15TIANJIN UNIV
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
TIANJIN UNIV
Publication Date
2012-08-15
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a zirconium diboride / silicon carbide composite material and a method for preparing the same by means of an arc melting in-suit reaction. Raw materials for reaction comprise zirconium powder, carbon boride powder and silicon carbide powder; the dried mixed powder is melted by electric arcs under the protection of argon so that the mixed powder reacts; and then the target material can be formed through solidification and crystallization. The zirconium diboride / silicon carbide composite material prepared by the arc melting in-suit reaction method has a microhardness of 24.0+ / -0.8 GPa and a breaking tenacity of 6.7+ / -0.7 MPa m<1 / 2>; the obdurability of the composite material is obviously higher than that of the zirconium diboride / silicon carbide composite materials prepared by other methods. Furthermore, the melting solidification preparation method employed in the invention is capable of solving the problems of high requirements for initial materials, complex preparation method, low material density and mechanical performance, high cost and the like in the preparation of the ZrB2-based composite material through solid-state sintering.
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Description

technical field

[0001] The invention relates to the technical field of ceramic materials, and more specifically relates to a high-performance zirconium diboride / silicon carbide composite material and a preparation method thereof. Background technique

[0002] Zirconium diboride (ZrB 2 ) is a metalloid structure compound with a hexagonal C32 structure. Because of its high melting point, high hardness, good electrical and thermal conductivity, and good neutron control ability, it is used in high-temperature structural ceramic materials, composite materials, refractory materials, It has been paid attention to and widely used in the fields of electrode materials and nuclear control materials. Many reports have shown that the addition of SiC can improve the oxidation resistance of materials and enhance their mechanical properties. Therefore, people have done a lot of research on the mechanical properties and high temperature properties of zirconium diboride / silicon carbide comp...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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