High-tenacity silicon carbide ceramic and preparation method thereof

A technology of silicon carbide ceramics with high toughness, applied in the field of ceramic production, can solve the problems of increasing the roughness of the fracture surface, increasing the energy of the fracture process, etc., and achieve the effect of increasing the sintering density, reducing the sintering temperature, and consuming fracture energy

Inactive Publication Date: 2015-06-03
ANHUI HEHAN OPTOELECTRONICS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The toughening methods currently used are trying to increase the energy consumed in the fracture process and increase the roughness of the fracture surface at the same time.

Method used

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Embodiment Construction

[0013] specific implementation plan

[0014] The present invention will be described in detail below through specific examples.

[0015] A high-toughness silicon carbide ceramic and its preparation method, which is made of the following raw materials in parts by weight (kg): silicon carbide 76, stainless steel powder 9, titanium powder 3, nano-zirconia 7, polyvinyl alcohol 3, beryllium powder 5, Ammonium polyphosphate 2, silane coupling agent KH-5802, graphite 3, sodium lignosulfonate 2, sintering aid 3, deionized water 86;

[0016] The sintering aid is made of the following raw materials in parts by weight (kg): aluminum oxide 5, yttrium oxide 2, ammonium chloride 2, iridium nitrate 6, carbon nanoparticles 5, clay powder 4, dimethyl silicone oil 2, Liquid paraffin 3, silane coupling agent KH-5501, artificial diamond powder 3, vinyl acetate resin 2, tricresyl phosphate 1, purified water 5; the preparation method is to combine aluminum oxide, yttrium oxide, iridium nitrate, ...

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PUM

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Abstract

The invention discloses high-tenacity silicon carbide ceramic and a preparation method thereof. The high-tenacity silicon carbide ceramic is characterized by being prepared from the following raw materials in parts by weight: 70-80 parts of silicon carbide, 8-13 parts of stainless steel powder, 2-4 parts of titanium powder, 4-8 parts of nano-zirconia, 1-3 parts of polyvinyl alcohol, 3-6 parts of beryllium powder, 1-2 parts of ammonium polyphosphate, 1-2 parts of a silane coupling agent KH-580, 3-4 parts of graphite, 2-3 parts of sodium lignin sulfonate, 2-3 parts of a sintering aid and 80-100 parts of deionized water. By adding stainless steel powder, the sintering density of the high-tenacity silicon carbide ceramic is improved, the sintering temperature is decreased, and resources are saved; by adding nano-zirconia and metal powder, the shape and the grain boundary characteristics of the ceramic are improved, and breaking energy is consumed, so that the tenacity of the ceramic is improved.

Description

technical field [0001] The invention relates to a high-toughness silicon carbide ceramic and a preparation method thereof, belonging to the technical field of ceramic production. Background technique [0002] The molecular arrangement and chemical bond properties of ceramic materials determine that the grain dislocation density in ceramic materials is low, [0003] Less slip system and less energy for crack nucleation and growth determine the brittle nature of ceramic materials. Brittleness and low reliability severely limit the application range of ceramic materials. Only by improving the fracture toughness of ceramics, realizing the strengthening and toughening of materials, and improving their reliability and service life, can ceramic materials be widely used. Therefore, ceramic toughening technology has always been a hot spot in ceramic research. The essence of toughening is to introduce a mechanism to absorb fracture energy in the material, reduce the power ...

Claims

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Application Information

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IPC IPC(8): C04B35/565C04B35/63
Inventor 夏云
Owner ANHUI HEHAN OPTOELECTRONICS TECH
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