Paper Title:
Influence of Infiltration Additives on the Phase, Microstructure and Oxidation Resistance of SiC Coating for Graphite Materials
  Abstract

Oxidation resistant SiC coating for graphites was prepared by a pack cementation process with mixture powders of Si, C, SiC and some infiltration additives containing MgO, Al2O3 and Cr2O3. The influence of different infiltration additives on the phase, microstructure and oxidation resistance of SiC coating was primarily investigated. The results showed that adding infiltration additive in the pack powders is helpful for depositing denser SiC coating on graphite substrate; and the coating prepared by using MgO as infiltration additive exhibited better oxidation resistance at high temperature. XRD analyses revealed that SiC coating prepared by adding of MgO as infiltration additive possessed more free silicon; and the SEM analyses displayed that the free silicon could effectively fill the small holes of the SiC coating, which resulted in a perfect dense surface structure of SiC coating. Oxidation test showed that the as-prepared SiC coating could effectively protect graphite materials at 1500oC for 200 hours and the corresponding weight loss of the coated graphite was only 0.13%.

  Info
Periodical
Key Engineering Materials (Volumes 336-338)
Edited by
Wei Pan and Jianghong Gong
Pages
1756-1758
DOI
10.4028/www.scientific.net/KEM.336-338.1756
Citation
J. F. Huang, F. Deng, L. Y. Cao, J. P. Wu, H. J. Luo, "Influence of Infiltration Additives on the Phase, Microstructure and Oxidation Resistance of SiC Coating for Graphite Materials", Key Engineering Materials, Vols. 336-338, pp. 1756-1758, 2007
Online since
April 2007
Export
Price
$32.00
Share

In order to see related information, you need to Login.

In order to see related information, you need to Login.

Authors: Ping Zhou, Zi Qiang Li, Hong Sheng Zhao, Kai Hong Zhang, Xiao Xue Liu, Bing Liu
Chapter 4: Functional Materials for Storage and Conversion of Energy
Abstract:Graphite is one of the most important material for the reactor core and fuel elements of high temperature gas-cooled reactor (HTR). Improving...
952
Authors: Ping Zhou, Zi Qiang Li, Hong Sheng Zhao, Kai Hong Zhang, Xiao Xue Liu, Bing Liu
Chapter 6: Ceramics for Next Generation Nuclear Power
Abstract:Pack cementation is an effective method in the manufacture of SiC coating on carbon material substrate surface, which is a controllable and...
807