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ZrB2-SiC-SiB6 superhigh-temperature ceramic material and preparing method thereof

An ultra-high temperature ceramic, zrb2-sic-sib6 technology, applied in the field of ZrB2-SiC-SiB6 ultra-high temperature ceramic materials and its preparation, can solve problems such as gaps, improve sintering performance, improve medium and high temperature oxidation resistance, and improve resistance The effect of oxidation properties

Inactive Publication Date: 2016-10-12
AEROSPACE RES INST OF MATERIAL & PROCESSING TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, existing ZrB 2 -SiC material technology is still far behind the actual engineering application

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0021] a ZrB 2 -SiC-SiB 6 A method for preparing an ultra-high temperature ceramic material. The method uniformly disperses and mixes silicon carbide powder, silicon hexaboride powder and zirconium boride powder by a high-speed ball milling method, and then obtains a relatively dense bulk material through a high-temperature hot-pressing sintering process. The specific steps of the method are:

[0022] 1) weighing silicon hexaboride powder, silicon carbide powder and zirconium boride powder according to the proportion, mixing the weighed powders into absolute ethanol for ultrasonic dispersion to obtain a mixture;

[0023] 2) Put the mixture obtained in step 1) into a planetary ball mill for high-speed ball milling and mixing. The ball milling time is 8 to 12 hours, and the mixing speed of the ball mill is ≥ 200rpm. The slurry is evaporated and dried on a rotary evaporator to obtain a mixed powder;

[0024] 3) grinding: the mixed powder obtained in step 2) is repeatedly groun...

Embodiment 1

[0029] A kind of high temperature anti-oxidation ZrB 2 -SiC-SiB 6 Ultra-high-temperature ceramics, the ultra-high-temperature ceramics include zirconium boride powder, silicon carbide powder and silicon hexaboride powder; the average particle size of zirconium boride powder is 1-2 microns, and its purity is ≥99%; the average particle size of silicon carbide powder is The average particle size of silicon hexaboride powder is 1-5 microns, and its purity is ≥99%. The volume of zirconium boride powder is calculated as 100% of the total volume of ultra-high temperature ceramics. The volume fraction is 70%, the volume fraction of the silicon carbide powder is 15%, and the volume fraction of the silicon hexaboride powder is 15%.

[0030] A kind of high temperature anti-oxidation ZrB 2 -SiC-SiB 6 A method for preparing an ultra-high temperature ceramic, the specific steps of which are:

[0031] 1) Weigh and mix the zirconium boride powder, silicon hexaboride powder and silicon car...

Embodiment 2

[0039] A kind of high temperature anti-oxidation ZrB 2 -SiC-SiB 6 Ultra-high-temperature ceramics, the ultra-high-temperature ceramics include zirconium boride powder, silicon carbide powder and silicon hexaboride powder; the average particle size of zirconium boride powder is 1-2 microns, and its purity is ≥99%; the average particle size of silicon carbide powder is The average particle size of silicon hexaboride powder is 1-5 microns, and its purity is ≥99%. The volume of zirconium boride powder is calculated as 100% of the total volume of ultra-high temperature ceramics. The volume fraction is 75%, the volume fraction of the silicon carbide powder is 20%, and the volume fraction of the silicon hexaboride powder is 5%.

[0040] A kind of high temperature anti-oxidation ZrB 2 -SiC-SiB 6 A method for preparing an ultra-high temperature ceramic, the specific steps of which are:

[0041] 1) Weigh and mix the zirconium boride powder, silicon hexaboride powder and silicon carb...

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Abstract

The invention relates to a ZrB2-SiC-SiB6 superhigh-temperature ceramic material and a preparing method thereof, in particular to a method for preparing an SiB6 particle and SiC particle dual-phase reinforced ZrB2 superhigh-temperature ceramic material through a hot pressed sintering method. The material has excellent high-temperature oxidation resistance, is simple in preparing process and short in period and belongs to the technical field of high-temperature thermal-protecting materials. According to a scattering method of powder of the ZrB2-SiC-SiB6 superhigh-temperature ceramic material, three kinds of powder of ZrB2, SiC and SiB6 are evenly scattered and mixed through a high-speed ball milling method, and then mixed powder can be obtained through a drying and grinding method. According to the preparing method of the ZrB2-SiC-SiB6 superhigh-temperature ceramic material, a high-temperature hot pressed sintering method is chosen, effects of different sintering techniques on the material are systematically analyzed, and a relative-compact block material can be obtained in a reasonable sintering technique condition.

Description

technical field [0001] The present invention relates to a kind of ZrB 2 -SiC-SiB 6 Ultra-high temperature ceramics and its preparation method, specifically preparing SiB by hot pressing and sintering method 6 Particle and SiC Particle Duplex Reinforced ZrB 2 A method for an ultra-high-temperature ceramic material. The material has excellent high-temperature oxidation resistance, and the preparation process is simple and the cycle is short, and belongs to the technical field of high-temperature thermal protection materials. Background technique [0002] High-temperature thermal protection materials refer to a class of materials that can maintain good physical and chemical stability in high-temperature, ultra-high-temperature service environments and reaction atmospheres. The basis and key to the successful development of advanced power systems and the maintenance of excellent standards. High-temperature thermal protection materials mainly include ultra-high-temperature ce...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/626C04B35/645
CPCC04B35/58078C04B35/62615C04B35/645C04B2235/3804C04B2235/3826C04B2235/656
Inventor 徐林吴坤戴志峰李炜冯志海张大海
Owner AEROSPACE RES INST OF MATERIAL & PROCESSING TECH
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