Improvement of the strength and toughness of carbon fiber/SiC composites via chemical vapor infiltration-grown SiC nanowire interphases

被引：33

作者：

He, Fang ^{[1
,2
]}

Liu, Yongsheng ^{[1
,2
]}

Tian, Zhuo ^{[2
]}

Zhang, Chengyu ^{[2
]}

Ye, Fang ^{[2
]}

Cheng, Laifei ^{[2
]}

Zhang, Litong ^{[2
]}

机构：

[1] Northwestern Polytech Univ, State Key Lab Solidificat Proc, Xian 710072, Shaanxi, Peoples R China

[2] Northwestern Polytech Univ, Sci & Technol Thermostruct Composite Mat Lab, Xian 710072, Shaanxi, Peoples R China

来源：

CERAMICS INTERNATIONAL | 2018年 / 44卷 / 02期

关键词：

Interphase; Mechanical properties; SiC; REACTIVE MELT INFILTRATION; CERAMIC-MATRIX COMPOSITES; MECHANICAL-PROPERTIES; C/SIC COMPOSITES; C/C COMPOSITES; HEAT-TREATMENT; MICROSTRUCTURE; INTERFACE; NANOTUBES; RESISTANCE;

D O I：

10.1016/j.ceramint.2017.10.197

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：

SiC nanowires (SiCnws) were used to modify the interphase of carbon fiber/pyrocarbon/SiC(C-f/PyC/SiC) composites. These SiCnws were grown in the carbon fiber preform via chemical vapor infiltration(CVI). The effects of these SiCnw interphases on the microstructure and mechanical properties of C-f/PyC/SiC composites were investigated. According to the obtained results, the composites containing SiCnw interphases(i.e., C-f/SiCnw/PyC/SiC and C-f/SiCnw/SiC) showed higher strength and toughness than C-f/PyC/SiC composites at both room and high temperatures. The superior pull-out and bridging crack characteristics of SiCnws can account for the toughening of C-f/SiC and C-f/PyC/SiC upon growth of SiCnw interphases, which resulted in composites with higher crack propagation resistances and superior load with standing capabilities.

引用

页码：2311 / 2319

页数：9

共 33 条

[1] Oxidation behavior of SiBC matrix modified C/SiC composites with different PyC interphase thicknesses [J].