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
收藏
页码：355 / 361
页数：7
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