High Temperature Oxidation Behaviors of Two Cast Ni-based Superalloys

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	High Temperature Oxidation Behaviors of Two Cast Ni-based Superalloys
	Gao Shuang 1,2; Hou Jieshan 2; Yang Fei 2; Wang Changshuai 2; Zhou Lanzhang 2
刊名	RARE METAL MATERIALS AND ENGINEERING
	2019-03-01
卷号	48 期号:3 页码:960-966
关键词	Ni-based superalloy anti-oxidation element oxidation kinetics oxidation mechanism
ISSN号	1002-185X
通讯作者	Hou Jieshan(jshou@imr.ac.cn)
英文摘要	High temperature oxidation behaviors of cast K317 and K325 alloy at 900 and 1000 degrees C in air environment were contrastively investigated by TGA, XRD and SEM (EDS). The results show that K317 alloy has a superior oxidation resistance compared with K325 alloy. The kinetic curves of the two alloys oxidized at 900 degrees C for 100 h obey the parabolic rate law while those at 1000 degrees C obey sectionally the parabolic rate law. The oxide structure of K317, from the top surface down to the base material, consists of NiO-TiO2-NiCr2O4 composite oxide, Cr2O3 oxide dense band and Al2O3 internal oxide. In comparison, internal oxidation is not observed in K325 alloy whose oxide layer is composed of two oxide layers: NiO-NiCr2O4-Nb2O5 composite oxide and Cr2O3 oxide layer. Serious MoO3 volatilization and oxide spallation take place in K325 alloy after the oxidation at 1000 degrees C for 100 h. In addition, the adhesion property of K325 alloy is worse than that of K317 alloy due to the occurrence of the micro-voids on the oxide layer/substrate interface.
WOS研究方向	Materials Science ; Metallurgy & Metallurgical Engineering
语种	英语
出版者	NORTHWEST INST NONFERROUS METAL RESEARCH
WOS记录号	WOS:000463845300041
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/132874]
专题	金属研究所_中国科学院金属研究所
通讯作者	Hou Jieshan
作者单位	1.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 2.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Liaoning, Peoples R China
推荐引用方式 GB/T 7714	Gao Shuang,Hou Jieshan,Yang Fei,et al. High Temperature Oxidation Behaviors of Two Cast Ni-based Superalloys[J]. RARE METAL MATERIALS AND ENGINEERING,2019,48(3):960-966.
APA	Gao Shuang,Hou Jieshan,Yang Fei,Wang Changshuai,&Zhou Lanzhang.(2019).High Temperature Oxidation Behaviors of Two Cast Ni-based Superalloys.RARE METAL MATERIALS AND ENGINEERING,48(3),960-966.
MLA	Gao Shuang,et al."High Temperature Oxidation Behaviors of Two Cast Ni-based Superalloys".RARE METAL MATERIALS AND ENGINEERING 48.3(2019):960-966.