Xps analysis of oxide formed on the surface of co-28cr-6mo-1si alloy oxidized at 550 ºc

Phacharaphon Tunthawiroon, Mettaya Kitiwan, Patthranit Wongpromrat, Akihiko Chiba

研究成果: Conference contribution

1 被引用数 (Scopus)

抄録

This work investigated the influence of oxidation durations on the formation of oxide on the surface of wrought Co-28Cr-6Mo-1Si alloy. The iso-thermal oxidation was individually performed in air at 550ºC for 4, 12 and 24 h. For comparison, the surface of the non-oxidized Co-28Cr-6Mo-1Si alloy was concurrently examined. The chemical compositions of the non-oxidized and oxidized alloys were principally analyzed via X-ray photoelectron spectroscopy (XPS). The XPS results revealed that the surface of the non-oxidized alloy enriched in Cr-oxide. After oxidation treatment, the Co-oxide, existing as Co2+ state was observed coexisting with two Cr-oxide states, Cr3+ and Cr4+. The low concentrations of Mo6+ were also observed on the oxidized alloy surface. With the increase in oxidation durations, the Co-oxide was suppressed by Cr-oxide. The XPS depth profile analysis indicated that the thickness of the oxide film increased with increasing the oxidation duration.

本文言語English
ホスト出版物のタイトルFunctional Materials
編集者Shu Yin, Alexander Pesin
出版社Trans Tech Publications Ltd
ページ95-100
ページ数6
ISBN(印刷版)9783035716009
DOI
出版ステータスPublished - 2020
イベントInternational Conference on Functional Materials, ICFM 2019 - Sendai, Japan
継続期間: 2019 9 42019 9 6

出版物シリーズ

名前Key Engineering Materials
845 KEM
ISSN(印刷版)1013-9826
ISSN(電子版)1662-9795

Conference

ConferenceInternational Conference on Functional Materials, ICFM 2019
国/地域Japan
CitySendai
Period19/9/419/9/6

ASJC Scopus subject areas

  • 材料科学(全般)
  • 材料力学
  • 機械工学

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