Oxidation behavior of a single-crystal Ni-base superalloy between 900 and 1000 degrees C in air

IMR OpenIR

	Oxidation behavior of a single-crystal Ni-base superalloy between 900 and 1000 degrees C in air; Oxidation behavior of a single-crystal Ni-base superalloy between 900 and 1000 degrees C in air
	C. T. Liu; J. Ma; X. F. Sun
	2010 ; 2010
发表期刊	Journal of Alloys and Compounds ; Journal of Alloys and Compounds
ISSN	0925-8388 ; 0925-8388
卷号	491 期号:1-2 页码:522-526
摘要	The oxidation behavior of a single-crystal Ni-base superalloy DD32 was studied in air at 900 and 1000 degrees C and analyzed by X-ray diffraction (XRD), scanning electron microscopy, combined with energy-dispersive X-ray spectroscopy (SEM/EDS). At 900 and 1000 degrees C, two oxidation steps appear in the oxidation kinetics. The first one is controlled by NiO growth and the second by Al(2)O(3) growth until a continuous Al(2)O(3) layer formed under the previously grown NiO layer after a critical time. The variations in the chemical composition due to segregations, which resulted from the solidification process, led to the formation of different kinds of oxide scale on the dendritic and interdendritic area during oxidation between 900 and 1000 degrees C. The scales formed between 900 and 1000 degrees C were complicated, and consisted of three layers: an outer columnar NiO layer with a small amount of CoO, an intermediate layer mainly composed of W(20)O(58), CrTaO(4), a small amount of spinels NiCr(2)O(4), NiAl(2)O(4) and CoAl(2)O(4), an inner continuous layer of alpha-Al(2)O(3). Crown Copyright (C) 2009 Published by Elsevier B.V. All rights reserved.; The oxidation behavior of a single-crystal Ni-base superalloy DD32 was studied in air at 900 and 1000 degrees C and analyzed by X-ray diffraction (XRD), scanning electron microscopy, combined with energy-dispersive X-ray spectroscopy (SEM/EDS). At 900 and 1000 degrees C, two oxidation steps appear in the oxidation kinetics. The first one is controlled by NiO growth and the second by Al(2)O(3) growth until a continuous Al(2)O(3) layer formed under the previously grown NiO layer after a critical time. The variations in the chemical composition due to segregations, which resulted from the solidification process, led to the formation of different kinds of oxide scale on the dendritic and interdendritic area during oxidation between 900 and 1000 degrees C. The scales formed between 900 and 1000 degrees C were complicated, and consisted of three layers: an outer columnar NiO layer with a small amount of CoO, an intermediate layer mainly composed of W(20)O(58), CrTaO(4), a small amount of spinels NiCr(2)O(4), NiAl(2)O(4) and CoAl(2)O(4), an inner continuous layer of alpha-Al(2)O(3). Crown Copyright (C) 2009 Published by Elsevier B.V. All rights reserved.
部门归属	[liu, c. t.] qingdao univ sci & technol, coll electromech engn, qingdao 266061, peoples r china. [ma, j.] qingdao univ sci & technol, coll mat sci & engn, qingdao 266061, peoples r china. [sun, x. f.] chinese acad sci, state key lab corros & protect, inst met res, shenyang 110016, peoples r china.;liu, ct (reprint author), qingdao univ sci & technol, coll electromech engn, qingdao 266061, peoples r china;liuchunting76@yahoo.com.cn ; [liu, c. t.] qingdao univ sci & technol, coll electromech engn, qingdao 266061, peoples r china. [ma, j.] qingdao univ sci & technol, coll mat sci & engn, qingdao 266061, peoples r china. [sun, x. f.] chinese acad sci, state key lab corros & protect, inst met res, shenyang 110016, peoples r china.;liu, ct (reprint author), qingdao univ sci & technol, coll electromech engn, qingdao 266061, peoples r china;liuchunting76@yahoo.com.cn
关键词	Single-crystal (Sc) Superalloy Single-crystal (Sc) Superalloy Oxidation Kinetics Oxidation Kinetics Surface Morphology Surface Morphology Microstructure Microstructure Stress Rupture Behavior Stress Rupture Behavior Cr-al Alloys Cr-al Alloys Coatings Coatings Microstructure Microstructure
URL	查看原文 ; 查看原文
WOS记录号	WOS:000274926300110 ; WOS:000274926300110
引用统计	被引频次：103[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/321006/31270
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	C. T. Liu,J. Ma,X. F. Sun. Oxidation behavior of a single-crystal Ni-base superalloy between 900 and 1000 degrees C in air, Oxidation behavior of a single-crystal Ni-base superalloy between 900 and 1000 degrees C in air[J]. Journal of Alloys and Compounds, Journal of Alloys and Compounds,2010, 2010,491, 491(1-2):522-526, 522-526.
APA	C. T. Liu,J. Ma,&X. F. Sun.(2010).Oxidation behavior of a single-crystal Ni-base superalloy between 900 and 1000 degrees C in air.Journal of Alloys and Compounds,491(1-2),522-526.
MLA	C. T. Liu,et al."Oxidation behavior of a single-crystal Ni-base superalloy between 900 and 1000 degrees C in air".Journal of Alloys and Compounds 491.1-2(2010):522-526.