Effects of the single layer CVD SiC interphases on the mechanical properties of the SiCf/SiC composites fabricated by PIP process

被引：94

作者：

Liu, Haitao ^{[1
]}

Cheng, Haifeng ^{[1
]}

Wang, Jun ^{[1
]}

Tang, Gengping ^{[1
]}

机构：

[1] Natl Univ Def Technol, Coll Aerosp & Mat Engn, Key Lab Adv Ceram Fiber & Composites, Changsha 410073, Peoples R China

来源：

CERAMICS INTERNATIONAL | 2010年 / 36卷 / 07期

关键词：

Mechanical properties; Precursors; SiC interphases; SiCf/SiC composites; SIC/SIC COMPOSITES; MATRIX COMPOSITES; FIBER; MICROSTRUCTURE;

D O I：

10.1016/j.ceramint.2010.05.014

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：

Owing to the degradation of the mechanical properties of the SiC fiber reinforced SiC matrix (SiCf/SiC) composites with the pyrocarbon (PyC) and BN interphases under oxidation environment and neutron irradiation, single layer SiC interphases prepared by chemical vapor deposition (CVD) process were employed to substitute for them. Effects of the CVD SiC interphases on the mechanical properties and interfacial characteristics of the SiCf/SiC composites fabricated by precursor infiltration and pyrolysis (PIP) process were investigated. Compared with the as-received SiCf/SiC composites, the SiCf/SiC composites with the single layer CVD SiC interphases exhibit an obvious toughened fracture behavior, the flexural strength of which is about 4 times that of the as-received SiCf/SiC composites. From the microstructural analysis, it can be confirmed that the SiC interphases play a key part in protecting the fibers from damage during composite preparation and weakening interfacial bonding, which can provide high in situ fiber strength and appropriate interfacial bonding strength for the SiCf/SiC composites. (C) 2010 Published by Elsevier Ltd and Techna Group S.r.l.

引用

页码：2033 / 2037

页数：5

共 13 条

[1] Mechanical properties of SiC/SiC composite with magnesium-silicon oxide interphase [J].