Oxidation and erosion resistance of MoSi2-CrSi2-Si/SiC coated C/C composites in static and aerodynamic oxidation environment

被引：67

作者：

Li He-Jun ^{[1
]}

Feng Tao ^{[1
]}

Fu Qian-Gang ^{[1
]}

Wu Heng ^{[1
]}

Shen Xue-Tao ^{[1
]}

机构：

[1] Northwestern Polytech Univ, Natl Key Lab Thermostruct Composite Mat, CC Composites Technol Res Ctr, Xian 710072, Shaanxi, Peoples R China

来源：

CARBON | 2010年 / 48卷 / 05期

基金：

中国国家自然科学基金;

关键词：

MICROSTRUCTURE; PROTECTION; PHASE;

D O I：

10.1016/j.carbon.2010.01.005

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

A MoSi2-CrSi2-Si multi-composition coating was prepared on the surface of SiC coated carbon/carbon (C/C) composites by pack cementation in argon The crystalline structure of the multi-composition coating was measured by X-ray diffraction The morphology and element distribution were analyzed by scanning electron microscopy and energy dispersive spectroscopy, respectively The isothermal oxidation and erosion resistance of the multi-layer coating were investigated in electrical furnace and high temperature wind tunnel, respectively These results indicated that the weight loss of the coated C/C composites was only 0 8% after oxidation in air at 1873 K for 500 h, and the sample was fractured after erosion at 1873 K for 32 h in wind tunnel The weight loss of the coated C/C composites was considered due to the excessive depletion of the outer coating and the appearance of defects in the coating The mismatch of thermal expansion coefficient between the multi-layer coating and C/C composites caused excessive local stress and resulted in the ;fracture of the coated C/C composites (C) 2010 Elsevier Ltd All rights reserved

引用

页码：1636 / 1642

页数：7

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