Microstructure and Magnetic Properties of Undercooled Fe-80at%Ni Alloys

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	Microstructure and Magnetic Properties of Undercooled Fe-80at%Ni Alloys
	Xie, H.2,3; Bai, G. H.1; Jia, L.2; Liu, E. K.2; Lu, Z. L.2
	2009
关键词	High undercooling Fe-80at%Ni alloy Structure Soft magnetic properties
卷号	620-622
页码	327-+
英文摘要	Bulk Fe-80at%Ni melts were undercooled by using cyclic superheating and glass slag purification technique, and the maximum undercooling 340 K could be achieved. The microstructures of Fe-80at%Ni alloys were observed by means of optical microscope (OM). The phase composition was identified by X-ray diffraction (XRD) analysis. The magnetic properties of Fe-80at%Ni alloys were measured by vibrating sample magnetometer (VSM) with a DC M-H analyzer. The results showed that there was only single gamma-(Fe, Ni) phase existing in undercooled Fe-80at%Ni alloys. Two grain refinements and one grain coarsening were observed in the undercooling range from 28 K to 340 K. The first grain refinement could be ascribed to dendrite-remelting, and the second to recrystallization induced by the stress originating from rapid solidification. The grain coarsening could be considered as a result of solid-state grain coalescence. The measurement of soft magnetic properties showed that the grain size D decreases with an increase of undercooling, the maximum M-s is 109.98emu/g, corresponding to minimum grain size 42.9 mu m or undercooling 210 K, and the coercive force H-c is in proportion to the reciprocal of grain size D-1.
会议录	ECO-MATERIALS PROCESSING AND DESIGN X
会议录出版者	TRANS TECH PUBLICATIONS LTD
会议录出版地	KREUZSTRASSE 10, 8635 DURNTEN-ZURICH, SWITZERLAND
语种	英语
资助项目	Shaanxi Natural Science Foundation[2004E108]
WOS研究方向	Materials Science
WOS记录号	WOS:000273336800082
内容类型	会议论文
源URL	[http://119.78.100.223/handle/2XXMBERH/37893]
专题	土木工程学院
通讯作者	Xie, H.
作者单位	1.Northwestern Polytech Univ, State Key Lab Solidificat Proc, Xian 710072, Peoples R China 2.Xian Univ Technol, Sch Mat Sci & Engn, Xian 710048, Peoples R China 3.Lanzhou Univ Technol, State Key Lab Nonferrous Met Mat, Lanzhou 730050, Peoples R China
推荐引用方式 GB/T 7714	Xie, H.,Bai, G. H.,Jia, L.,et al. Microstructure and Magnetic Properties of Undercooled Fe-80at%Ni Alloys[C]. 见:.