High temperature scaling of two phase Fe-50Cu alloy with controlled microstructures

IMR OpenIR

	High temperature scaling of two phase Fe-50Cu alloy with controlled microstructures
	Y. S. Li; F. G. Wang; Y. Niu; W. T. Wu
	2001
发表期刊	Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing
ISSN	0921-5093
卷号	315 期号:1-2 页码:245-249
摘要	In order to study the effect of microstructure changes on the selective oxidation of the most reactive component in two-phase alloys, the oxidation behaviors of an as-cast Fe-50Cu alloy and its sputtered coating with quite different grain sizes were examined at 800 degreesC. For the as-cast Fe-50Cu alloy, a complex scale formed after air oxidation, containing an outermost layer of copper oxide (CuO + Cu2O) plus an inner region composed of a mixture of the oxides of Fe and Cu as well as some Fe-Cu double oxides. A region of internal oxidation of Fe was also observed. Under oxygen pressure low enough that only Fe can be oxidized, a simultaneous external and internal oxidation of Fe was present. However, a single external Fe oxide scale formed in Fe-50Cu sputtered coating when the grain size was largely reduced. The transition of the oxidation modes above indicates that the grain size reduction can promote the selective oxidation of Fe effectively. The mechanism is mainly attributed to the significantly extended solubility of iron in copper, and also to the presence of a large number of grain boundaries in the coating, as a direct consequence of the grain size reduction, which may act as short-circuit diffusion paths for the fast outward diffusion of iron during oxidation process. (C) 2001 Elsevier Science B.V. All rights reserved.
部门归属	acad sinica, inst met res, state key lab corros & protect, shenyang 110015, peoples r china. dalian univ technol, dept mat engn, dalian 116024, peoples r china.;li, ys (reprint author), acad sinica, inst met res, state key lab corros & protect, wencui rd 62, shenyang 110015, peoples r china
关键词	Fe-50cu Two-phase Alloy Microstructure Selective Oxidation 2-phase Binary-alloys Low Oxidant Pressures Fe-cu Alloys Internal Oxidation Selective Oxidation Scales Nanocrystallization Oxygen
URL	查看原文
WOS记录号	WOS:000171110800033
引用统计	被引频次：4[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/321006/36709
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	Y. S. Li,F. G. Wang,Y. Niu,et al. High temperature scaling of two phase Fe-50Cu alloy with controlled microstructures[J]. Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing,2001,315(1-2):245-249.
APA	Y. S. Li,F. G. Wang,Y. Niu,&W. T. Wu.(2001).High temperature scaling of two phase Fe-50Cu alloy with controlled microstructures.Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing,315(1-2),245-249.
MLA	Y. S. Li,et al."High temperature scaling of two phase Fe-50Cu alloy with controlled microstructures".Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing 315.1-2(2001):245-249.