Carbon nano-tube zirconium boride-carborundum based material and preparation method thereof

A carbon nanotube and silicon carbide-based technology, which is applied in the field of zirconium boride-silicon carbide-based composite materials and its preparation, can solve the problems of low strength, poor sintering performance, and fragility, achieve high specific strength, and reduce sintering temperature , the effect of cost control

Inactive Publication Date: 2008-09-03
HARBIN INST OF TECH
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Problems solved by technology

[0003] The purpose of the present invention is to provide a carbon nanotube zirconium boride-silicon carbide-based composite material and its preparation method i

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  • Carbon nano-tube zirconium boride-carborundum based material and preparation method thereof
  • Carbon nano-tube zirconium boride-carborundum based material and preparation method thereof

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specific Embodiment approach 1

[0009] Embodiment 1: In this embodiment, the carbon nanotube zirconium boride-silicon carbide based composite material mainly consists of 63-75 parts by volume of zirconium boride, 20 parts of silicon carbide, and 5-15 parts of carbon nanotube to make.

specific Embodiment approach 2

[0010] Embodiment 2: This embodiment differs from Embodiment 1 in that the carbon nanotube zirconium boride-silicon carbide based composite material also includes 0.01-2 parts by volume of boron carbide. Others are the same as the first embodiment.

specific Embodiment approach 3

[0011] Specific embodiment three: the difference between this embodiment and specific embodiment one is that the carbon nanotube zirconium boride-silicon carbide based composite material includes 63.5 to 70 parts of zirconium boride, 20 parts of silicon carbide and 5.5 to 5 parts by volume. 10 parts made of carbon nanotubes.

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Abstract

A carbon nano-tube zirconium boride-silicon carbide composite and a method for the products thereof relate to a zirconium boride-silicon carbide composite and a method for the products thereof. The invention solves the problem that the prior zirconium boride - silicon carbide composite is fragile, low-intensity and poor in sintering performance. The inventive product is mainly prepared by zirconium boride, silicon carbide and carbon nano-tube. The preparation method of the invention includes: dispersing carbon nano-tubes ultrasonically in dispersing agents; adding zirconium boride and silicon carbide; then ball milling and dispersing, drying, grinding; putting the mixed powder into a graphite die coated with release agent for hot pressing. The inventive composite material has a relative density of 98.1%-99.8%, a fracture toughness increased by 19%-44% than that of zirconium boride - silicon carbide base, a bending strength increased by 13 per cent-85 per cent than that of zirconium diboride - silicon carbide base and a sintering temperature reduced to 1800 DEG C.

Description

technical field [0001] The invention relates to a zirconium boride-silicon carbide matrix composite material and a preparation method thereof. Background technique [0002] The high-temperature strength, oxidation resistance and thermal shock resistance of ultra-high temperature heat-resistant materials make them suitable for extreme environments including hypersonic long-duration flight, atmospheric re-entry, trans-atmospheric flight and rocket propulsion systems. Various key parts or components such as cone, wing leading edge, engine hot end, etc. Materials capable of meeting such demanding performance requirements are mainly concentrated in multi-component composite ultra-high temperature ceramic material systems composed of high-melting point borides. Oxidation properties. In the past few years, it has been recognized that the addition of silicon carbide can significantly improve the mechanical properties and oxidation resistance of zirconium boride ceramics. Many fore...

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Application Information

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IPC IPC(8): C04B35/58
Inventor 杨飞宇杜善义韩杰才张幸红孟松鹤
Owner HARBIN INST OF TECH
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