Formation and Oxidation Resistance of NbSi2 Coatings on Niobium by Pack Cementation

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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 et al., "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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$35.00

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