Microstructure and mechanical properties of Cf/SiC composites with dispersed C-SiC interphase prepared by chemical vapor infiltration

被引：20

作者：

Niu, Changhui ^{[1
]}

Zhang, Qing ^{[1
]}

Cheng, Laifei ^{[1
]}

Ye, Fang ^{[1
]}

Zhang, Litong ^{[1
]}

机构：

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

来源：

COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING | 2023年 / 165卷

基金：

中国国家自然科学基金;

关键词：

Ceramic-matrix composites; Interphase; Mechanical properties; Microstructural analysis; CARBON-FIBER; CERAMIC COMPOSITES; MATRIX COMPOSITES; SURFACE; BEHAVIORS; INTERFACE; DESIGN; CMC;

D O I：

10.1016/j.compositesa.2022.107339

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A simple and cost-effective method for preparing Cf/SiC composites with dispersed C-SiC interphase using fiber surface sizing agents is proposed and verified. The formation mechanism of the dispersed C-SiC interphase is investigated, and the effects of the dispersed C-SiC interphase on the interfacial bonding, strengthening, and toughening mechanisms of the composites are also evaluated. The results reveal that the dispersed C-SiC interphase is formed by the diffusion of SiC precursor molecules into the porous carbon coating derived from the decomposition of the sizing agent. The dispersed C-SiC interphase plays a similar role as the pyrolytic carbon interphase prepared by chemical vapor infiltration. The tensile strength and Weibull modulus of Cf/SiC com-posites with dispersed C-SiC interphase are 223 MPa and 5.19, respectively.This study has a positive application value for the manufacture of composites in terms of significantly reducing the preparation cost and cycle duration.

引用

页数：7

共 26 条

[1] Effect of PyC interphase thickness on mechanical behaviors of SiBC matrix modified C/SiC composites fabricated by reactive melt infiltration [J].