Properties of Si/SiC ceramic composite subjected to chemical vapour infiltration

被引：12

作者：

Amirthan, G. ^{[1
]}

Udayakumar, A. ^{[2
]}

Prasad, V. V. Bhanu ^{[3
]}

Balasubramanian, M. ^{[1
]}

机构：

[1] Indian Inst Technol, Dept Met & Mat Engn, Madras 600036, Tamil Nadu, India

[2] Natl Aerosp Labs, Bangalore 560017, Karnataka, India

[3] Def Met Res Lab, Hyderabad 500058, Andhra Pradesh, India

来源：

CERAMICS INTERNATIONAL | 2009年 / 35卷 / 07期

关键词：

SiC; Cotton fabric; Chemical vapour infiltration; Porous ceramic; Carbothermal reaction; SILICON-CARBIDE CERAMICS; MECHANICAL-PROPERTIES; MICROSTRUCTURE; WOOD; OXIDATION; DENSIFICATION;

D O I：

10.1016/j.ceramint.2009.02.022

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Si/SiC ceramic composite was prepared by infiltration of liquid silicon into carbon preforms that was made from cotton fabric and phenolic resin. This composite was subjected to the chemical vapour infiltration (CVI), using methyltrichlorosilane as a precursor gas. The effect of infiltration time on densification and mechanical properties was studied. Results show a significant improvement in density by pore closure. Flexural strength increases with increasing infiltration time. However, beyond 60 It of infiltration, the strength improvement was insignificant. The high temperature oxidation resistance of the above ceramics was also studied. The CVI treated samples show considerable resistance to oxidation compared to untreated samples. Thermogravimetric analysis also confirmed the better oxidation resistance of the CVI treated samples. (C) 2009 Elsevier Ltd and Techna Group S.r.l. All rights reserved.

引用

页码：2601 / 2607

页数：7

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