Improvement of densification uniformity of carbon/silicon carbide composites during chemical vapour infiltration

被引：1

作者：

Kim, Kyung-Mi ^{[1
,2
]}

Seo, Jin-Won ^{[1
]}

Choi, Kyoon ^{[1
]}

Lee, Jong-Heun ^{[2
]}

机构：

[1] Korea Inst Ceram Engn & Technol, KICET Icheon Branch, 30 Gyeongchung Ro, Icheon Si 17303, Gyeonggi Do, South Korea

[2] Korea Univ, Dept Mat Sci & Engn, 145 Anam Ro, Seoul 02841, South Korea

来源：

INTERNATIONAL JOURNAL OF NANOTECHNOLOGY | 2018年 / 15卷 / 6-7期

关键词：

carbon fibre; silicon carbide; CVI; chemical vapour infiltration; CMC; ceramic matrix composite; high temperature ceramics; SILICON-CARBIDE; BEHAVIOR;

D O I：

10.1504/IJNT.2018.096346

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

We have investigated the influence of the process parameters on the density and distribution of 2.5D carbon preforms during chemical vapour infiltration (CVI) of silicon carbide. The lower the pressure and the substrate temperature, the higher the density and its uniformity. The temperature of the lower part of the disc-shaped specimen was as low as 1000 degrees C to suppress the surface reaction that caused the closure of the open porosity. The specimen of 1000 degrees C under 10 ton resulted in the density of 72.2% and the standard deviation of 13.9%., while that of 1000 degrees C under 50 ton showed the density of 69.1% and the standard deviation of 18.6%. The low density of the specimen was mainly attributed to the large voids between the carbon bundles.

引用

页码：555 / 567

页数：13

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