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STUDY OF SOLIDIFICATION FOR GAS-ATOMIZED DROPLET OF Cu-Co-Fe ALLOY
Zhao Lei1,2; Jiang Hongxiang2; Ahmad, Tauseef2; Zhao Jiuzhou2
Corresponding AuthorZhao Jiuzhou(jzzhao@imr.ac.cn)
2015-07-11
Source PublicationACTA METALLURGICA SINICA
ISSN0412-1961
Volume51Issue:7Pages:883-888
AbstractCu-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.
KeywordCu-Co-Fe alloy liquid phase decomposition rapid solidification modeling and simulation
Funding OrganizationNational Natural Science Foundation of China
Indexed BySCI
Language英语
Funding ProjectNational Natural Science Foundation of China[51271185] ; National Natural Science Foundation of China[51031003] ; National Natural Science Foundation of China[51471173]
WOS Research AreaMetallurgy & Metallurgical Engineering
WOS SubjectMetallurgy & Metallurgical Engineering
WOS IDWOS:000358471900015
PublisherSCIENCE PRESS
Citation statistics
Cited Times:2[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/120431
Collection中国科学院金属研究所
Corresponding AuthorZhao Jiuzhou
Affiliation1.Liaoning Shihua Univ, Sch Mech Engn, Fushun 113001, Peoples R China
2.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China
Recommended Citation
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.
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