Effect of Mo on the Oxidation Behavior of NiTiAl Alloy

Abstract:

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The effect of Mo on the oxidation behavior of TiNiAl at 1073K has been investigated. It is found that 1at.% Mo addition can increase the diffusion of Al in the alloys and promote the formation of dense and continuous Al-rich oxide layer. Therefore the oxygen diffusion can be effectively impeded and the oxidation behavior of TiNiAl is improved. The observation of the cross-sectional oxidation layer showed that beneath the top oxide scale a Mo-rich oxide layer formed. Because the oxide of Mo is volatile at high temperature, voids formed in the oxide scales during the oxidation process. 3at.% Mo addition could cause cracks between the oxide scale and the substrate, resulting in poor adhesion of the oxide scale to the substrate.

Info:

Periodical:

Materials Science Forum (Volumes 546-549)

Edited by:

Yafang Han et al.

Pages:

1481-1484

DOI:

10.4028/www.scientific.net/MSF.546-549.1481

Citation:

J. Xu et al., "Effect of Mo on the Oxidation Behavior of NiTiAl Alloy", Materials Science Forum, Vols. 546-549, pp. 1481-1484, 2007

Online since:

May 2007

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Price:

$35.00

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