Effects of Si and Nb on oxidation behavior in high purity ferritic stainless steels

Yasushi Kato, Masatoshi Ito, Osamu Furukimi

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

The effects of Si and Nb on the oxidation behavior at 1073 K in high purity 17Cr steels were investigated in conjunction with the Laves phase. In the early stage of oxidation, mass gains increased not only slightly with Nb addition but also further with the addition of Si and Nb, and precipitation of the Laves phase occurred for a short time with Nb addition and was promoted with Si addition. The increase in mass gain in the early stage of oxidation was seemingly caused by the oxidation of the Laves phase near the surface of steel. The parabolic growth rate constant became small for long-term oxidation with Nb addition in spite of Si addition. The reason for this appeared to be that the Laves phase, which had already precipitated at grain boundaries, suppressed the grain boundary diffusion of cations in steel.

Original languageEnglish
Title of host publication65th ABM International Congress, 18th IFHTSE Congress and 1st TMS/ABM International Materials Congress 2010
Pages4298-4305
Number of pages8
Publication statusPublished - Dec 1 2010
Event65th ABM International Congress, 18th IFHTSE Congress and 1st TMS/ABM International Materials Congress 2010 - Rio de Janeiro, Brazil
Duration: Jul 26 2010Jul 30 2010

Publication series

Name65th ABM International Congress, 18th IFHTSE Congress and 1st TMS/ABM International Materials Congress 2010
Volume5

Other

Other65th ABM International Congress, 18th IFHTSE Congress and 1st TMS/ABM International Materials Congress 2010
CountryBrazil
CityRio de Janeiro
Period7/26/107/30/10

All Science Journal Classification (ASJC) codes

  • Mechanics of Materials

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