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Boride-silicon carbide-boron carbide ternary ceramic-base composite material and preparation method thereof

A technology of ternary ceramics and composite materials, which is applied in the field of ternary ceramic matrix composite materials and its preparation, can solve the problems of low toughness and achieve the effects of improving fracture toughness, material toughness, and strength

Inactive Publication Date: 2008-09-17
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention aims to solve the defect of low toughness existing in the existing ultra-high temperature ceramic materials, and provides a boride-silicon carbide-boron carbide ternary ceramic matrix composite material and its preparation method

Method used

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specific Embodiment approach 1

[0011] Embodiment 1: The boride-silicon carbide-boron carbide ternary ceramic matrix composite material in this embodiment is composed of 50% to 80% boride, 10% to 30% silicon carbide and 5% to 30% boride according to volume percentage. % made of boron carbide.

specific Embodiment approach 2

[0012] Specific embodiment two: The boride-silicon carbide-boron carbide ternary ceramic matrix composite material in this embodiment is composed of 60% to 70% boride, 15% to 25% silicon carbide and 10% to 25% boride according to volume percentage. % made of boron carbide.

specific Embodiment approach 3

[0013] Embodiment 3: The boride-silicon carbide-boron carbide ternary ceramic matrix composite material in this embodiment is made of 65% boride, 20% silicon carbide and 15% boron carbide in volume percentage.

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Abstract

The invention relates to a boride-silicon carbide-boron carbide ternary ceramic matrix composite material and a production method thereof. The invention relates to a ternary ceramic matrix composite material and a production method thereof, and solves the problem of poor toughness of the existing ultrahigh temperature ceramic materials. The inventive boride-silicon carbide-boron carbide ternary ceramic matrix composite material is made from, by volume percentages, 50%-80% of borides, 10%-30% of silicon carbide and 5%-30% of boron carbide. The production method comprises the following steps: (1) wet mixing and sieving; and (2) hot-press sintering. The maximal bending strength of the boride-silicon carbide-boron carbide ternary ceramic matrix composite material reaches 890 MPa, and the maximal fracture toughness thereof reaches 7.1 MPa / m<2>.

Description

technical field [0001] The invention relates to a ternary ceramic matrix composite material and a preparation method thereof. Background technique [0002] Boride ceramic materials can maintain good physical and chemical stability in high-temperature environments and reaction atmospheres, and their melting points exceed 3000 °C. Due to their excellent physical properties (high melting point, thermal conductivity, elastic modulus, and excellent chemical stability), boride ceramic materials have become the most promising candidate materials for key parts of modern aircraft, and have a wide range of applications in the aerospace field. Application prospect. [0003] Although boride ceramic materials have many advantages, their low strength and fracture toughness have not been well resolved, which is one of the key factors limiting their excellent performance. The conventional method is to add a second phase component to the boride matrix to achieve the effect of toughening an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/58C04B35/622
Inventor 韩杰才张幸红孟松鹤翁凌韩文波
Owner HARBIN INST OF TECH
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