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

doi:10.4028/www.scientific.net/KEM.845.95

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

Materials Processing and Characterization Division

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Abstract

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.

Original language	English
Title of host publication	Functional Materials
Editors	Shu Yin, Alexander Pesin
Publisher	Trans Tech Publications Ltd
Pages	95-100
Number of pages	6
ISBN (Print)	9783035716009
DOIs	https://doi.org/10.4028/www.scientific.net/KEM.845.95
Publication status	Published - 2020
Event	International Conference on Functional Materials, ICFM 2019 - Sendai, Japan Duration: 2019 Sep 4 → 2019 Sep 6

Publication series

Name	Key Engineering Materials
Volume	845 KEM
ISSN (Print)	1013-9826
ISSN (Electronic)	1662-9795

Conference

Conference	International Conference on Functional Materials, ICFM 2019
Country	Japan
City	Sendai
Period	19/9/4 → 19/9/6

Keywords

Co-Cr-Mo alloys
Dental
Dental restoration
Oxidation
Oxide film
PFM
XPS analysis

ASJC Scopus subject areas

Materials Science(all)
Mechanics of Materials
Mechanical Engineering

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Xps analysis of oxide formed on the surface of co-28cr-6mo-1si alloy oxidized at 550 ºc. / Tunthawiroon, Phacharaphon; Kitiwan, Mettaya; Wongpromrat, Patthranit; Chiba, Akihiko.

Functional Materials. ed. / Shu Yin; Alexander Pesin. Trans Tech Publications Ltd, 2020. p. 95-100 (Key Engineering Materials; Vol. 845 KEM).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Tunthawiroon, P, Kitiwan, M, Wongpromrat, P & Chiba, A 2020, Xps analysis of oxide formed on the surface of co-28cr-6mo-1si alloy oxidized at 550 ºc. in S Yin & A Pesin (eds), Functional Materials. Key Engineering Materials, vol. 845 KEM, Trans Tech Publications Ltd, pp. 95-100, International Conference on Functional Materials, ICFM 2019, Sendai, Japan, 19/9/4. https://doi.org/10.4028/www.scientific.net/KEM.845.95

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

abstract = "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.",

keywords = "Co-Cr-Mo alloys, Dental, Dental restoration, Oxidation, Oxide film, PFM, XPS analysis",

author = "Phacharaphon Tunthawiroon and Mettaya Kitiwan and Patthranit Wongpromrat and Akihiko Chiba",

note = "Publisher Copyright: {\textcopyright} 2020 Trans Tech Publications Ltd, Switzerland. Copyright: Copyright 2020 Elsevier B.V., All rights reserved.; International Conference on Functional Materials, ICFM 2019 ; Conference date: 04-09-2019 Through 06-09-2019",

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doi = "10.4028/www.scientific.net/KEM.845.95",

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AU - Wongpromrat, Patthranit

AU - Chiba, Akihiko

PY - 2020

Y1 - 2020

N2 - 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.

AB - 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.

KW - Co-Cr-Mo alloys

KW - Dental

KW - Dental restoration

KW - Oxidation

KW - Oxide film

KW - PFM

KW - XPS analysis

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