Phase stabilities in a NiCrAlYRe coating alloy

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	Phase stabilities in a NiCrAlYRe coating alloy
	J. J. Liang; H. Wei; Y. L. Zhu; T. Jin; X. F. Sun; Z. Q. Hu
	2012
发表期刊	Surface & Coatings Technology
ISSN	0257-8972
卷号	206 期号:11-12 页码:2746-2750
摘要	MCrAlY can serve as stand-alone overlay coatings or bond coats in thermal barrier coating systems, and its phase stabilities play a vital role in determining the performance of these coating systems. In the present paper, the phase evolution of a NiCrAlY model coating alloy containing Re was investigated by experimental observation and thermodynamic modeling in the temperature range from 800 degrees C to 1200 degrees C. A phase transformation occurred at temperatures between 1000 degrees C-1050 degrees C, which was confirmed as a four-phase reaction, gamma'-Ni3Al+alpha-Cr ->gamma-Ni+beta NiAl. The beta-NiAl phase was observed to undergo a martensite transformation in the specimens that were quenched from temperatures above 1000 degrees C, and this NiAl martensite could affect the microhardness of the NiCrAlY coating alloy significantly. TEM analysis illustrated that between the martensitic plates existed a twin boundary (macrotwin), and within the martensitic plates many nano striations (microtwins) were present. (C) 2011 Elsevier B.V. All rights reserved.
部门归属	[liang, j. j.; wei, h.; jin, t.; sun, x. f.; hu, z. q.] chinese acad sci, inst met res, superalloys div, shenyang 110016, peoples r china. [zhu, y. l.] chinese acad sci, shenyang natl lab mat sci, inst met res, shenyang 110016, peoples r china.;liang, jj (reprint author), chinese acad sci, inst met res, superalloys div, shenyang 110016, peoples r china.;jjliang@imr.ac.cn
关键词	Nicraly Microstructure Martensite Transformation Aluminide Bond Coat Thermal Barrier Coatings Thermoelastic Martensitic-transformation Ni-al Alloys Cr Evolution Microstructure Oxidation Behavior Systems
URL	查看原文
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/60088
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. Phase stabilities in a NiCrAlYRe coating alloy[J]. Surface & Coatings Technology,2012,206(11-12):2746-2750.
APA	J. J. Liang,H. Wei,Y. L. Zhu,T. Jin,X. F. Sun,&Z. Q. Hu.(2012).Phase stabilities in a NiCrAlYRe coating alloy.Surface & Coatings Technology,206(11-12),2746-2750.
MLA	J. J. Liang,et al."Phase stabilities in a NiCrAlYRe coating alloy".Surface & Coatings Technology 206.11-12(2012):2746-2750.