Influence of Re on the Properties of a NiCoCrAlY Coating Alloy

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	Influence of Re on the Properties of a NiCoCrAlY Coating Alloy
	J. J. Liang; H. Wei; Y. L. Zhu; X. F. Sun; Z. Q. Hu; M. S. Dargusch; X. D. Yao
	2011
发表期刊	Journal of Materials Science & Technology
ISSN	1005-0302
卷号	27 期号:5 页码:408-414
摘要	MCrAlY can serve as stand-alone overlay coatings or bond coats in thermal barrier coating systems, and its properties play a. vital role in determining the performance of these coating systems. In order to further understand the behavior of MCrAlY coatings, several NiCoCrAlY model alloys with different levels of Re (0.3 wt%, 6 wt%, and 9 wt%) were investigated. Microstructural observation showed the addition of Re promoted the precipitation of Cr-rich phases, such as alpha-Cr and sigma. The presence of alpha-Cr lowered the coefficient of thermal expansion (CTE) of the coating alloys, which could reduce the CTE mismatch at the scale-metal interface. The solid solution strengthening effect of Re is responsible for an increase in Rockwell hardness of the coating alloys. But the isothermal oxidation resistance at 1100 degrees C was deteriorated due to the precipitation of brittle alpha-Cr phase, a phase of inferior oxidation resistance compared with beta-NiAl and gamma-Ni.
部门归属	[liang, j. j.; wei, h.; zhu, y. l.; sun, x. f.; hu, z. q.] chinese acad sci, inst met res, shenyang 110016, peoples r china. [liang, j. j.] chinese acad sci, grad sch, beijing 100039, peoples r china. [wei, h.; dargusch, m. s.; yao, x. d.] univ queensland, sch mat & min engn, brisbane, qld 4072, australia.;liang, jj (reprint author), chinese acad sci, inst met res, shenyang 110016, peoples r china;jjliang@imr.ac.cn
关键词	Nicocraly Phase Constitution Oxidation Thermal Expansion Behavior Hardness Thermal Barrier Coatings Mcraly Coatings Rhenium System Mechanisms Behavior
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WOS记录号	WOS:000291514600005
引用统计	被引频次：37[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/321006/30497
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	J. J. Liang,H. Wei,Y. L. Zhu,et al. Influence of Re on the Properties of a NiCoCrAlY Coating Alloy[J]. Journal of Materials Science & Technology,2011,27(5):408-414.
APA	J. J. Liang.,H. Wei.,Y. L. Zhu.,X. F. Sun.,Z. Q. Hu.,...&X. D. Yao.(2011).Influence of Re on the Properties of a NiCoCrAlY Coating Alloy.Journal of Materials Science & Technology,27(5),408-414.
MLA	J. J. Liang,et al."Influence of Re on the Properties of a NiCoCrAlY Coating Alloy".Journal of Materials Science & Technology 27.5(2011):408-414.