Effect of Al content on the high-temperature oxidation of Co-20Cr-(5,10)Al oxide dispersion strengthened superalloys

Yu, Hao; Ukai, Shigeharu; Hayashi, Shigenari; Ono, Naoko

doi:10.1016/j.corsci.2017.01.015


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Effect of Al content on the high-temperature oxidation of Co-20Cr-(5,10)Al oxide dispersion strengthened superalloys

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Title:	Effect of Al content on the high-temperature oxidation of Co-20Cr-(5,10)Al oxide dispersion strengthened superalloys
Authors:	Yu, Hao Browse this author
	Ukai, Shigeharu Browse this author →KAKEN DB
	Hayashi, Shigenari Browse this author
	Ono, Naoko Browse this author
Keywords:	Cobalt
	Alumina
	SEM
	Oxidation
Issue Date:	Apr-2017
Publisher:	Elsevier
Journal Title:	Corrosion Science
Volume:	118
Start Page:	49
End Page:	59
Publisher DOI:	10.1016/j.corsci.2017.01.015
Abstract:	The high-temperature oxidation of Co-based oxide dispersion strengthened (ODS) Co-20Cr-(5, 10) Al-2.4Hf-1.5Y(2)O(3) (wt%) superalloys was investigated at 900 C-omicron and 1000 C-omicron. The 10Al (wt%) superalloys possess better oxidation resistance with the formation of alumina scale than the 5Al (wt%) with a duplex scale of CoCr2O4/Cr2O3 and internal Al2O3. The alumina on the 10Al superalloy is composed of theta- and alpha-alumina at 900 C-omicron but dominated by alpha-alumina at 1000 C-omicron. The lower weight gain of 10Al superalloys at 1000 C-omicron than at 900 C-omicron was associated with different growth mechanisms of the Al2O3 scales. (C) 2017 Elsevier Ltd. All rights reserved.
Rights:	© 2017. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/
Rights:	http://creativecommons.org/licenses/by-nc-nd/4.0/
Type:	article (author version)
URI:	http://hdl.handle.net/2115/73370
Appears in Collections:	工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 余浩

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