Paper Title:
Formation and Oxidation Resistance of NbSi2 Coatings on Niobium by Pack Cementation
  Abstract

NbSi2 coatings were formed on niobium by halide-activated pack cementation process. The as-coated niobium samples were oxidized in air up to 1723 K by thermogravimetry method. The surface and cross-sectional morphology, phase composition and element distribution of the NbSi2 coatings before and after oxidation were characterized by SEM, XRD and EPMA. The results show that the as-formed coatings consist of single phase of hexagonal NbSi2 and the oxidation resistance of pure niobium can be greatly improved by pack siliconizing.

  Info
Periodical
Key Engineering Materials (Volumes 280-283)
Edited by
Wei Pan, Jianghong Gong, Chang-Chun Ge and Jing-Feng Li
Pages
907-910
DOI
10.4028/www.scientific.net/KEM.280-283.907
Citation
M. Li, L. Song, J. Le, X. W. Zhang, B. G. Pei, X. F. Hu, "Formation and Oxidation Resistance of NbSi2 Coatings on Niobium by Pack Cementation", Key Engineering Materials, Vols. 280-283, pp. 907-910, 2005
Online since
February 2007
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