Fabrication and Properties of 3D-Cf/Mullite Composites with SiC Interfacial Coatings

被引：9

作者：

Dai, Kewei ^{[1
]}

Zhang, Chenchen ^{[1
]}

Ma, Qingsong ^{[1
]}

Liu, Haitao ^{[1
]}

机构：

[1] Natl Univ Def Technol, Sci & Technol Adv Ceram Fibers & Composites Lab, Changsha 410073, Hunan, Peoples R China

来源：

DIANCHI ADVANCED MATERIALS FORUM 2013 | 2014年 / 833卷

关键词：

mullite; carbon fibers; sol-gel preparation; SiC coating; mechanical properties; MATRIX COMPOSITES; MULLITE;

D O I：

10.4028/www.scientific.net/AMR.833.150

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Three-dimensional carbon fiber reinforced mullite composites (3D-C-f/mullite) were fabricated by sol-gel method with diphasic mullite sol as raw materials. SiC interfacial coatings were deposited by polycarbosilane infiltration and pyrolysis before sol-gel process. The as-fabricated composites showed 285.7MPa in flexural strength, relatively close to 277.6MPa of those without coatings. After treated at 1300 degrees C and 1500 degrees C in Ar atmosphere for 1h, the retention rates of flexural strength were 80.0% and 69.9%, respectively, which showed a great improvement compared to the composites without coatings. This was attributed to the prevention of carbothermal reduction between carbon fiber and matrix by SiC coatings.

引用

页码：150 / 153

页数：4

共 11 条

[1] Electrophoretic deposition infiltration of 2-D woven SiC fibre mats with mixed sols of mullite composition [J].