Effects of Dy on cyclic oxidation resistance of NiAl alloy

IMR OpenIR

	Effects of Dy on cyclic oxidation resistance of NiAl alloy
其他题名	Effects of Dy on cyclic oxidation resistance of NiAl alloy
	Guo Hongbo 1; Wang Xiaoyan 1; Li Ji 3; Wang Shixing 1; Gong Shengkai 1
	2009
发表期刊	TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
ISSN	1003-6326
卷号	19 期号:5 页码:1185-1189
摘要	The NiAl alloys modified by reactive element(R-E), dysprosium(Dy), were produced by arc melting. The microstructures of the modified alloys were investigated by field emission-scanning electron microscope(FE-SEM) equipped with energy dispersive spectroscope(EDS) and back scatter detector. Cyclic oxidation tests at 1 200 degrees C were conducted to assess the cyclic oxidation performance of the alloys. The Dy dopant prevents the surface rumpling of the oxide scale and the formation of cavities beneath the oxide scale. The pegs consisting of Dy-rich oxide inclusion core and an outer alumina sheath develop deeply in the alloy and improve the oxide scale adhesion. 0.05%-0.1% (molar fraction) Dy dramatically improves the cyclic oxidation resistance of the NiAl alloy. Too high concentration of Dy is deleterious because of the fast oxidation rate caused by severe internal oxidation.
其他摘要	The NiAl alloys modified by reactive element(RE), dysprosium(Dy), were produced by arc melting. The microstructures of the modified alloys were investigated by field emission-scanning electron microscope(FE-SEM) equipped with energy dispersive spectroscope(EDS) and back scatter detector. Cyclic oxidation tests at 1 200 ℃ were conducted to assess the cyclic oxidation performance of the alloys. The Dy dopant prevents the surface rumpling of the oxide scale and the formation of cavities beneath the oxide scale. The pegs consisting of Dy-rich oxide inclusion core and an outer alumina sheath develop deeply in the alloy and improve the oxide scale adhesion. 0.05%-0.1% (molar fraction) Dy dramatically improves the cyclic oxidation resistance of the NiAl alloy. Too high concentration of Dy is deleterious because of the fast oxidation rate caused by severe internal oxidation.
关键词	THERMAL BARRIER COATINGS HIGH-TEMPERATURE SCALE ADHESION GROWN OXIDE BOND COAT BEHAVIOR SULFUR PERFORMANCE HAFNIUM NiAl reactive element dysprosium(Dy) oxidation adhesion
收录类别	CSCD
语种	英语
资助项目	[National Natural Science Foundation of China] ; [Program for Changjiang Scholars and Innovative Research Team in Chinese University]
CSCD记录号	CSCD:3712107
引用统计	被引频次：9[CSCD] [CSCD记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/150609
专题	中国科学院金属研究所
作者单位	1.Beijing Univ Aeronaut & Astronaut, Dept Materials Sci & Engn, Beijing 100083, Peoples R China 2.Beijing Univ Aeronaut & Astronaut, Beijing Key Lab Adv Funct Materials & Thin Film Technol, Beijing 100083, Peoples R China 3.中国科学院金属研究所
推荐引用方式 GB/T 7714	Guo Hongbo,Wang Xiaoyan,Li Ji,et al. Effects of Dy on cyclic oxidation resistance of NiAl alloy[J]. TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA,2009,19(5):1185-1189.
APA	Guo Hongbo,Wang Xiaoyan,Li Ji,Wang Shixing,&Gong Shengkai.(2009).Effects of Dy on cyclic oxidation resistance of NiAl alloy.TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA,19(5),1185-1189.
MLA	Guo Hongbo,et al."Effects of Dy on cyclic oxidation resistance of NiAl alloy".TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA 19.5(2009):1185-1189.