The microstructure and properties of SiC/SiC-based composites fabricated by low-temperature melt infiltration of Al-Si alloy

被引：18

作者：

Cao, Xiaoyu ^{[1
]}

Yin, Xiaowei ^{[1
]}

Ma, Xiaokang ^{[1
]}

Fan, Xiaomeng ^{[1
]}

Cai, Yanzhi ^{[1
,2
]}

Li, Jianping ^{[1
]}

Cheng, Laifei ^{[1
]}

Zhang, Litong ^{[1
]}

机构：

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

[2] Xian Univ Architecture & Technol, Coll Mat & Mineral Resources, Xian 710055, Shaanxi, Peoples R China

来源：

CERAMICS INTERNATIONAL | 2016年 / 42卷 / 08期

基金：

中国国家自然科学基金;

关键词：

SiC/SiC composites; Matrix modification; Mechanical property; Thermal diffusivity; MATRIX COMPOSITES; FIBER; BEHAVIOR; FATIGUE; CREEP;

D O I：

10.1016/j.ceramint.2016.03.126

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：

Dense SiC/SiC-based composites were fabricated by introducing Ti3Si(Al)C-2-based ceramics into Chemical Vapor Infiltration (CVI) fabricated porous SiC/SiC composites. For the purpose of reducing the damage to SiC fiber, the low-temperature melt infiltration of Al-Si alloy was utilized. The microstructure was observed, showing that the inter-bundle pores were filled by reaction-formed new phases and the porosity of SiC/SiC-based composites decreased to less than 5%. Owing to the densification of the matrix, higher thermal diffusivity was obtained compared with CVI fabricated SiC/SiC composites. The mechanical properties were also analyzed. The compressive strength and in-plane shear strength were 10.9% and 11.3% higher than those of CVI fabricated SiC/SiC composites, respectively. (C) 2016 Elsevier Ltd and Techna Group S.r.l. All rights reserved.

引用

页码：10144 / 10150

页数：7

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