Improvement of the mechanical properties of hot-pressed silicon-carbide-fiber-reinforced silicon carbide composites by polycarbosilane impregnation

被引：54

作者：

Yoshida, K ^{[1
]}

Imai, M ^{[1
]}

Yano, T ^{[1
]}

机构：

[1] Tokyo Inst Technol, Nucl Reactors Res Lab, Meguro Ku, Tokyo 1528550, Japan

来源：

COMPOSITES SCIENCE AND TECHNOLOGY | 2001年 / 61卷 / 09期

基金：

日本学术振兴会;

关键词：

ceramic-matrix composites; preceramic polymer; mechanical properties; hot-pressing;

D O I：

10.1016/S0266-3538(01)00031-8

中图分类号：

TB33 [复合材料];

学科分类号：

摘要：

Green sheets of SIC with Al2O3-Y2O3-CaO sintering additives prepared by the doctor-blade method and polycarbosilane (PCS)impregnated Hi-Nicalon cloth with a BN coating were used for the fabrication of SiC-fiber-reinforced SIC (SiC/SiCf) composites by hot-pressing. Two kinds of SiC/SiCf composites with different fiber volume fractions were fabricated and their room-temperature mechanical properties were investigated. These composites showed non-brittle fracture behavior. The maximum strength of a composite with 52 vol. % of fibers was about twice as high as that of a composite with 40 vol. % of fibers, and the composite hot-pressed at 1700 degreesC showed the highest maximum strength. In this fabrication process, PCS-impregnation into Hi-Nicalon cloth was an effective way of forming the matrix between fibers. (C) 2001 Elsevier Science Ltd. All rights reserved.

引用

页码：1323 / 1329

页数：7

共 31 条

[1] Thermal stability of a PCS-derived SiC fibre with a low oxygen content (Hi-Nicalon) [J].