Paper Title:
Oxidation Behavior of Mo-Si-B In Situ Composites
  Abstract

Isothermal oxidation behavior of Al added Mo-Si-B in-situ composites was investigated under Ar-20%O2 and air atmosphere over the temperature range of 1073–1673 K. The Al added Mo-Si-B composites ((Mo-8.7mol%Si-17.4mol%B)-1mol%Al) were prepared by arc-melting, and homogenized at 2073 K for 24 h in an Ar-flow atmosphere. The ternary Mo-Si-B in-situ composite exhibited a rapid mass loss at the initial oxidation stage and then the passive oxidation after the substrates were sealed with borosilicate glass in the temperature range of 1173–1473 K, whereas it exhibited a rapid mass gain around 1073 K. On the other hand, the Al addition significantly improved the oxidation resistance of Mo-Si-B in-situ composites at temperatures from 1073–1573 K. These excellent oxidation resistances are considered to be due to the rapid formation of a continuous, dense scale of Al-Si-O complex oxides.

  Info
Periodical
Solid State Phenomena (Volume 127)
Edited by
Masaaki Naka
Pages
215-220
DOI
10.4028/www.scientific.net/SSP.127.215
Citation
A. Yamauchi, K. Yoshimi, Y. Murakami, K. Kurokawa, S. Hanada, "Oxidation Behavior of Mo-Si-B In Situ Composites ", Solid State Phenomena, Vol. 127, pp. 215-220, 2007
Online since
September 2007
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$32.00
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