Microstructure and oxidation resistant property of C/C composites modified by SiC-MoSi2-CrSi2 coating

被引：15

作者：

Chu, Y. -H. ^{[1
]}

Fu, Q. -G. ^{[1
]}

Cao, C. -W. ^{[1
]}

Li, H. -J. ^{[1
]}

Li, K. -Z. ^{[1
]}

Lei, Q. ^{[1
]}

机构：

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

来源：

SURFACE ENGINEERING | 2011年 / 27卷 / 05期

基金：

中国国家自然科学基金;

关键词：

Carbon; Composites; Oxidation; Coating; CARBON-CARBON COMPOSITES; CARBON/CARBON COMPOSITES; ANTIOXIDATION PROPERTY; BEHAVIOR; PROTECTION;

D O I：

10.1179/026708410X12687356948670

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

To prevent carbon/carbon (C/C) composites from oxidation, a dense and multiphase inlaid SiC-MoSi2-CrSi2 coating was prepared by pack cementation. The coatings were characterised by scanning electron microscopy, energy dispersive spectroscopy and X-ray diffraction. The effect of pack composition on the oxidation properties was studied on low density C/C composite, and then optimum composition was finalised. The optimum composition was the one containing 5 wt-% Cr and oxidation behaviour of high and low density C/C composites coatings with this composition was studied. Oxidation test shows that, when the Cr content was 5 wt-%, the SiC-MoSi2-CrSi2 coating possessed excellent oxidation resistant ability. After application of the SiC-MoSi2-CrSi2 multiphase coating, the low density C/C composite showed a mass loss of only 1.36% after oxidation at 1873 K for 43 h, while the mass loss of the coated high density sample was up to 7.45% after oxidation at 1873 K for 8 h.

引用

页码：355 / 361

页数：7