Paper Title:
Mo-Si-C-N Multi-Layer Anti-Oxidation Coating on C/C Composites
  Abstract

A Mo-Si-C-N multi-layer anti-oxidation coating was in situ fabricated on C/C composites by fused slurry and reaction-sintering method in nitrogen atmosphere using Mo and Si element powders, and characterized by X-ray diffractometry, optical microscopy, X-ray photoelectron spectroscopy, and scanning electron microscopy with energy dispersive spectroscopy. It is shown that the coating contains three distinctive layers, namely, SiC inner-layer, MoSi2/Si middle-layer and Si3N4/SiC/Si thin surface-layer. The MoSi2/Si middle-layer, whose thickness could be controlled by dipping process, is the main portion of coating. Oxidation test reveals that the Mo-Si-C-N multi-layer coating significantly improves the oxidation resistance of the C/C composites. Compared with the Mo-Si-C coating, the oxidation temperature is extended up to 1450°C. After oxidation pre-treating at 1400°C, the anti-oxidizing temperature of the Mo-Si-C-N multi-layer coated C/C composites can be raised to 1500°C and the weight loss is less than 1wt% after 12-hour oxidizing test.

  Info
Periodical
Key Engineering Materials (Volumes 353-358)
Edited by
Yu Zhou, Shan-Tung Tu and Xishan Xie
Pages
1899-1902
DOI
10.4028/www.scientific.net/KEM.353-358.1899
Citation
Z. H. Lai, J. H. Jeon, J. C. Zhu, Z. D. Yin, "Mo-Si-C-N Multi-Layer Anti-Oxidation Coating on C/C Composites ", Key Engineering Materials, Vols. 353-358, pp. 1899-1902, 2007
Online since
September 2007
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Price
$32.00
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