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	Influences of pulsing current on crystallization and microhardness of Fe/sub 73.5/Cu/sub 1/Nb/sub 3/Si/sub 13.5/B/sub 9/ amorphous ribbon
	Qiu Shengbao ; Zhang Chengyu ; Yao Kefu
	2010-05-10 ; 2010-05-10
关键词	Experimental/ amorphous magnetic materials annealing boron alloys copper alloys glass transition iron alloys microhardness nanostructured materials niobium alloys precipitation silicon alloys/ pulsing current treatment crystallization microhardness amorphous ribbon diffusibility structural relaxation precipitation nanocrystal grain size isothermal annealing nanocrystallization Fe/sub 73.5/Cu/sub 1/Nb/sub 3/Si/sub 13.5/B/sub 9// A8140N Fatigue, embrittlement, and fracture A6470P Glass transitions A6220M Fatigue, brittleness, fracture, and cracks A8130M Precipitation A6475 Solubility, segregation, and mixing A8140G Other heat and thermomechanical treatments/ Fe73.5Cu1Nb3Si13.5B9/ss Fe73.5/ss Si13.5/ss Nb3/ss Cu1/ss B9/ss Cu/ss Fe/ss Nb/ss Si/ss B/ss
中文摘要	Fe/sub 73.5/Cu/sub 1/Nb/sub 3/Si/sub 13.5/B/sub 9/ amorphous ribbon can be significantly nanocrystallized by pulsing current treatment in a short time (within 30 s) at low temperature (100 K lower than glass transition temperature). Under the action of high density pulsing current, the diffusibility of atoms has been enhanced. The microhardness of the amorphous alloy is increased by 10% (from 8.2 to 9.0) with respect to the initial ribbon, resulted by the structural relaxation induced by pulsing current treating. An abrupt increase of the microhardness by 50% (from 8.2 to 12.4) has been obtained in the specimen after increasing the treated time, which results from the precipitation of abundant alpha -Fe nanocrystals with an average grain size of 8.5 nm. Isothermal annealing needed 1 h but pulsing current treatment only about 30 s for full crystallization, indicating the latter is an effective way for the nanocrystallization of the studied amorphous alloy.
语种	中文 ; 中文
出版者	Science Press ; China
内容类型	期刊论文
源URL	[http://hdl.handle.net/123456789/24205]
专题	清华大学
推荐引用方式 GB/T 7714	Qiu Shengbao,Zhang Chengyu,Yao Kefu. Influences of pulsing current on crystallization and microhardness of Fe/sub 73.5/Cu/sub 1/Nb/sub 3/Si/sub 13.5/B/sub 9/ amorphous ribbon[J],2010, 2010.
APA	Qiu Shengbao,Zhang Chengyu,&Yao Kefu.(2010).Influences of pulsing current on crystallization and microhardness of Fe/sub 73.5/Cu/sub 1/Nb/sub 3/Si/sub 13.5/B/sub 9/ amorphous ribbon..
MLA	Qiu Shengbao,et al."Influences of pulsing current on crystallization and microhardness of Fe/sub 73.5/Cu/sub 1/Nb/sub 3/Si/sub 13.5/B/sub 9/ amorphous ribbon".(2010).

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