Thermal stability of phases in a NiCoCrAlY coating alloy

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	Thermal stability of phases in a NiCoCrAlY coating alloy
	J. J. Liang; H. Wei; G. C. Hou; Q. Zheng; X. F. Sun; H. R. Guan; Z. Q. Hu
	2008
发表期刊	Journal of Materials Research
ISSN	0884-2914
卷号	23 期号:8 页码:2264-2274
摘要	The temperature dependence of the thermal stability in a NiCoCrAlY coating alloy was examined by experimental observation and thermodynamic modeling in the 400-1200 degrees C temperature range. The results indicated that the thermal stabilities of primary beta-NiAl, beta-NiAl/alpha-Cr eutectic, and gamma-Ni were slightly temperature dependent, but those of gamma'-Ni3Al, sigma-(Cr,Co,Ni), and alpha-Cr were strongly temperature dependent in the annealed NiCoCrAlY specimens. The temperature dependence of the thermal stabilities among gamma'-Ni3Al, sigma-(Cr,Co,Ni), and alpha-Cr might be ascribed to the sigma ->alpha transformation at similar to 1100 degrees C and the gamma'->gamma transformation at similar to 800 degrees C. Further, using Thermocalc associated with TTNi7 database, thermodynamic equilibria were calculated. The modeling results were compared with the experimental results and found to be in reasonable agreement with the experimental observations of beta-NiAl, sigma-(Cr,Co,Ni), and gamma'-N3Al. Some deviations observed are discussed in the light of both limited availability of thermodynamic data and experimental problems.
部门归属	[liang, j. j.; wei, h.; hou, g. c.; zheng, q.; sun, x. f.; guan, h. r.; hu, z. q.] chinese acad sci, inst met res, superalloys div, shenyang 110016, peoples r china. [liang, j. j.] chinese acad sci, grad sch, beijing 100039, peoples r china.;wei, h (reprint author), chinese acad sci, inst met res, superalloys div, shenyang 110016, peoples r china;hwei@imr.ac.cn
关键词	Aluminide Bond Coat Barrier Coatings Mcraly-coatings Martensitic-transformation Microstructural Evolution Oxidation Precipitation Rhenium
URL	查看原文
WOS记录号	WOS:000258240900029
引用统计	被引频次：14[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/321006/32916
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,G. C. Hou,et al. Thermal stability of phases in a NiCoCrAlY coating alloy[J]. Journal of Materials Research,2008,23(8):2264-2274.
APA	J. J. Liang.,H. Wei.,G. C. Hou.,Q. Zheng.,X. F. Sun.,...&Z. Q. Hu.(2008).Thermal stability of phases in a NiCoCrAlY coating alloy.Journal of Materials Research,23(8),2264-2274.
MLA	J. J. Liang,et al."Thermal stability of phases in a NiCoCrAlY coating alloy".Journal of Materials Research 23.8(2008):2264-2274.