STUDY OF SOLIDIFICATION FOR GAS-ATOMIZED DROPLET OF Cu-Co-Fe ALLOY

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	STUDY OF SOLIDIFICATION FOR GAS-ATOMIZED DROPLET OF Cu-Co-Fe ALLOY
	Zhao Lei 1,2; Jiang Hongxiang 2; Ahmad, Tauseef 2; Zhao Jiuzhou 2
刊名	ACTA METALLURGICA SINICA
	2015-07-11
卷号	51 期号:7 页码:883-888
关键词	Cu-Co-Fe alloy liquid phase decomposition rapid solidification modeling and simulation
ISSN号	0412-1961
通讯作者	Zhao Jiuzhou(jzzhao@imr.ac.cn)
英文摘要	Cu-Co-Fe alloys have excellent properties such as high strength, high electrical conductivity and giant magneto resistance (GMR). These alloys are promising candidates to be used as electric contactors, integrated circuit lead frame, wires & cables, ferromagnetism materials. However, the manufacturing of Cu-Co-Fe alloys is extremely difficult due to the presence of metastable miscibility gap in the liquid state. The liquid-liquid decomposition generally leads to serious phase segregated microstructure during the conventional solidification process. Studies in recent years reveal that rapid solidification techniques can effectively suppress the liquid phase separation. In this work, rapid solidification experiment is carried out with Cu-10%Co-10%Fe (mass fraction) alloy by using the high pressure gas atomization technique. Powders having composite microstructure with the Fe-Co-rich particles homogeneously dispersing in the Cu matrix are obtained. A model is developed to describe the microstructure evolution in an atomized droplet of Cu-Co-Fe alloy during the liquid-liquid phase transformation. The microstructure formation is simulated by coupling the thermodynamic and kinetic calculations. The favorable agreements between the calculated and experimental results for the powders of different sizes indicate that the model describes the microstructure evolution in the atomized droplets of Cu-Co-Fe alloy well. The results demonstrate that the effect of the Marangoni migration and Ostwald coarsening of the Fe-Co-rich droplets are very week under the rapid cooling conditions of gas atomization. For Cu-10%Co-10%Fe powders with diameter less than 220 mu m, the average radius R-a and number density N of the Fe-Co-rich particles depend exponentially on the powder diameter d.
资助项目	National Natural Science Foundation of China[51271185] ; National Natural Science Foundation of China[51031003] ; National Natural Science Foundation of China[51471173]
WOS研究方向	Metallurgy & Metallurgical Engineering
语种	英语
出版者	SCIENCE PRESS
WOS记录号	WOS:000358471900015
资助机构	National Natural Science Foundation of China
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/120430]
专题	金属研究所_中国科学院金属研究所
通讯作者	Zhao Jiuzhou
作者单位	1.Liaoning Shihua Univ, Sch Mech Engn, Fushun 113001, Peoples R China 2.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Zhao Lei,Jiang Hongxiang,Ahmad, Tauseef,et al. STUDY OF SOLIDIFICATION FOR GAS-ATOMIZED DROPLET OF Cu-Co-Fe ALLOY[J]. ACTA METALLURGICA SINICA,2015,51(7):883-888.
APA	Zhao Lei,Jiang Hongxiang,Ahmad, Tauseef,&Zhao Jiuzhou.(2015).STUDY OF SOLIDIFICATION FOR GAS-ATOMIZED DROPLET OF Cu-Co-Fe ALLOY.ACTA METALLURGICA SINICA,51(7),883-888.
MLA	Zhao Lei,et al."STUDY OF SOLIDIFICATION FOR GAS-ATOMIZED DROPLET OF Cu-Co-Fe ALLOY".ACTA METALLURGICA SINICA 51.7(2015):883-888.