Isothermal oxidation behavior of single-crystal Ni-base superalloy containing rhenium in air

IMR OpenIR

	Isothermal oxidation behavior of single-crystal Ni-base superalloy containing rhenium in air
	Chunting, Liu ; Xiaofeng, Sun ; Ji, Ma ; Haiyan, Cong ; Wanfeng, Liu
通讯作者	Chunting, Liu(liuchunting76@yahoo.com.cn)
	2007-08-01
发表期刊	RARE METAL MATERIALS AND ENGINEERING
ISSN	1002-185X
卷号	36 期号:8 页码:1407-1411
摘要	The high temperature oxidation behavior of the single-crystal Ni-base superalloy DD32 containing rhenium was investigated at 900 degrees C and 1000 degrees C in air by using SEM, XRD, and SEM/EDAX. It is found that there are two oxidation stages in the oxidation kinetics curves at 900 degrees C and 1000 degrees C. In the initial stage, the mass gain rapidly increases and basically obeys a parabola law due to the formation and growth of NiO. In the second oxidation stage, it obeys the asymptotic level linear law with the oxidation time increasing to a critical time when the mass gain goes to be slow, and the Kp value corresponds to the formation and growth of Al2O3. There are three layers for the oxidation film at 900 degrees C and 1000 degrees C: an outer layer of columnar (Ni,Co)O, an intermediate layer mainly composed of complex oxides and a small amount of spinels, and a continuous inner layer of alpha-Al2O3. The phase rich in Re and W precipitates may play a role of "diffusion barrier", which is distributed in the intermediate layer during oxidation, effectively decreases the diffusion rate of Al element in the substrate outward. As a result, a continuous oxide layer of Al2O3 is formed in the inner layer to restrain the growth of oxide film and decrease the oxidation rate.
关键词	single-crystal Ni-base superalloy DD32 Re isothermal oxidation
收录类别	SCI
语种	英语
WOS研究方向	Materials Science ; Metallurgy & Metallurgical Engineering
WOS类目	Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS记录号	WOS:000249456800022
出版者	NORTHWEST INST NONFERROUS METAL RESEARCH
引用统计	被引频次：8[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/89665
专题	中国科学院金属研究所
通讯作者	Chunting, Liu
作者单位	1.Qingdao Univ Sci & Technol, Qingdao 266061, Peoples R China 2.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China 3.Qingdao Zero Elect Co Ltd, Qingdao 266101, Peoples R China 4.Labour Bur, Qingdao 266000, Peoples R China
推荐引用方式 GB/T 7714	Chunting, Liu,Xiaofeng, Sun,Ji, Ma,et al. Isothermal oxidation behavior of single-crystal Ni-base superalloy containing rhenium in air[J]. RARE METAL MATERIALS AND ENGINEERING,2007,36(8):1407-1411.
APA	Chunting, Liu,Xiaofeng, Sun,Ji, Ma,Haiyan, Cong,&Wanfeng, Liu.(2007).Isothermal oxidation behavior of single-crystal Ni-base superalloy containing rhenium in air.RARE METAL MATERIALS AND ENGINEERING,36(8),1407-1411.
MLA	Chunting, Liu,et al."Isothermal oxidation behavior of single-crystal Ni-base superalloy containing rhenium in air".RARE METAL MATERIALS AND ENGINEERING 36.8(2007):1407-1411.