Paper Title:
Effects of Cr and Al on High Temperature Oxidation Resistance of Nb-Si System Intermetallics
  Abstract

The effects of Cr and Al on high temperature oxidation resistance of Nb-Si system intermetallics have been investigated by scanning electron microscopy (SEM), X-ray diffraction (XRD) and weight gain method. The results showed that the high temperature oxidation resistance can be substantially improved by proper Cr or Al addition. The further analysis revealed that Cr promotes the formation of CrNbO4 in scale and improve the adherence between the oxide scale and the substrate. It also found that Al improves the surface morphology of oxide scale and changes oxidation products by promoting the AlNbO4 formation.

  Info
Periodical
Materials Science Forum (Volumes 546-549)
Edited by
Yafang Han et al.
Pages
1485-1488
DOI
10.4028/www.scientific.net/MSF.546-549.1485
Citation
S. Y. Qu, Y. F. Han, J. X. Song, Y. W. Kang, "Effects of Cr and Al on High Temperature Oxidation Resistance of Nb-Si System Intermetallics", Materials Science Forum, Vols. 546-549, pp. 1485-1488, 2007
Online since
May 2007
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