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Silicon carbide ceramic embedded with plasticizing substance

A technology of silicon carbide ceramics and silicon carbide powder, which is applied in the field of silicon carbide ceramics and ceramics, can solve the problems of high raw material cost, rising cost, affecting the uniformity of the quality of toughened silicon carbide ceramics, etc., and achieves the effect of low cost

Inactive Publication Date: 2010-09-01
NINGBO UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] Toughened silicon carbide ceramics containing silicon carbide whiskers or carbon fibers are indeed a type of silicon carbide ceramics with high toughness. However, due to the high cost of silicon carbide whiskers contained in raw materials, the cost of the entire toughened ceramic product is In addition, there is another problem with this type of toughened silicon carbide ceramics, that is, in its manufacturing process, silicon carbide whiskers with a high aspect ratio and carbon fibers are generally more difficult to integrate with other silicon carbide materials. The raw materials for ceramic production are evenly mixed, which to a certain extent affects the quality uniformity of the corresponding toughened silicon carbide ceramic products

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Example 1, one of the preparation methods of toughened silicon carbide ceramics containing flaky alumina embedded particles: 0.5%-3.0% (weight) of C-B sintering aid, and 1.0%-5.0% (weight) of PVA ( polyvinyl alcohol), and 2.0%-12.0% (weight) of flaky alumina particles, and 80.0%-96.5% (weight) of silicon carbide powder for dry ball milling, compression molding, at 100°C-300 It is solidified in the temperature range of ℃, and then sintered in the temperature range of 1700°C-2100°C for 0.5-3.0 hours to prepare a toughened silicon carbide ceramic containing flaky alumina embedded particles.

[0017] Among them, the preparation technology or customized products of flaky alumina particles can be provided by the High-tech Industry Development Department of Wuhan University and the Productivity Promotion Center of Wuhan University. The preparation method of the flaky alumina particles (that is, flaky alumina powder) can also be found in the prior art, such as: (1) the inventor...

Embodiment 2

[0018] Example 2, the second preparation method of toughened silicon carbide ceramics containing flaky alumina embedded particles: 0.5%-3.0% (weight) of C-B sintering aid, and 1.0%-5.0% (weight) of PVA ( polyvinyl alcohol), and 2.0%-12.0% (weight) of aluminum oxide particles, and 80.0%-96.5% (weight) of silicon carbide powder, and an appropriate amount of water, made into a slurry material, Mixed by wet ball milling, dried, granulated, molded, solidified at a temperature range of 100°C-300°C, and then sintered at a temperature range of 1700°C-2100°C for 0.5-3.0 hours to produce flake-shaped alumina embedded particles Toughened silicon carbide ceramics. Wherein, the preparation technology of the flaky alumina particles or the acquisition route of the customized product is the same as that in Example 1.

Embodiment 3

[0019] Example 3, the third preparation method of toughened silicon carbide ceramics containing flaky alumina embedded particles: 0.5%-3.0% (weight) of C-B sintering aid, and 1.0%-5.0% (weight) of PVA ( polyvinyl alcohol), and 2.0%-12.0% (weight) of aluminum oxide particles, and 80.0%-96.5% (weight) of silicon carbide powder, and an appropriate amount of water, made into a slurry material, Mechanical stirring and mixing, while applying ultrasonic waves to the slurry material, after such treatment, drying, granulation, molding, curing at a temperature range of 100°C-300°C, and then sintering at a temperature range of 1700°C-2100°C for 0.5-3.0 Hours, a toughened silicon carbide ceramic containing flake-like alumina embedded particles was fabricated. Wherein, the preparation technology of the flaky alumina particles or the acquisition route of the customized product is the same as that in Example 1.

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Abstract

This invention relates to the silicon carbide ceramic, particularly the toughness improved silicon carbide ceramic containing plate alumina insert granules. This invention provides a technique pattern for production of the inventive product. The price of the plate alumina granules is cheaper and is easy to be mixed with other components. The inventive product is even ceramic and better toughness.This invention solves some problems such as crack formation.

Description

technical field [0001] The invention relates to a ceramic, in particular to a silicon carbide ceramic, in particular to a toughened silicon carbide ceramic containing flaky alumina embedded particles. Background technique [0002] The toughened silicon carbide ceramics reported so far are mostly toughened silicon carbide ceramics containing silicon carbide whiskers or carbon fibers. For reports on toughened silicon carbide ceramics containing silicon carbide whiskers, see: Invention (design) by Tian Jiemo et al., Tsinghua University application, application number CN91101684.8 Patent Application "Whisker Toughened and Strengthened Carbon Ceramic Composite Material"; and , invented (designed) by Alexander J. Pazik, applied by Tang Chemical Material Co., Ltd., application number is CN90110427.2 patent application "silicon carbide whisker reinforced ceramic composite material and its manufacturing method"; and, Cheng Lai Invented (designed) by Fei, Zhang Litong, Xu Yongdong, L...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/565C04B35/80
Inventor 李榕生水淼王霞宋岳
Owner NINGBO UNIV