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LIQUID LIQUID PHASE SEPARATION AND FORMA TION OF TWO GLASSY PHASES IN Zr-Ce-Co-Cu IMMISCIBLE ALLOYS
Wang Zhongyuan1,2; He Jie1; Yang Baijun1; Jiang Hongxiang1; Zhao Jiuzhou1; Wang Tongmin2; Hao Hongri1
Corresponding AuthorHe Jie(jiehe@imr.ac.cn)
2016-11-01
Source PublicationACTA METALLURGICA SINICA
ISSN0412-1961
Volume52Issue:11Pages:1379-1387
AbstractThe liquid-liquid phase separation has been used recently to design two-glassy-phase alloys with desirable mechanical, magnetic and thermal properties. The occurrence of the liquid-liquid phase separation in the Zr-Ce binary immiscible alloys can lead to the formation of two coexistent crystalline Zr-rich and Ce-rich phases after complete solidification. In this work, a new quaternary complex alloy system (ZraCeb)((1-x))(CocCud)(x) was designed on the basis of the addition of metastable Co-Cu immiscible alloys in the stable Zr-Ce immiscible alloys. Distribrition ratio of Co and Cu in two coexistent liquids was calculated. The mechanisms of phase formation and microstructure evolution were investigated using OM, SEM, EDS, XRD and DTA. The results show that a single-phase homogeneous melt of (ZraCeb)((1-x))(CocCud)(x) alloys takes place the liquid-liquid phase separation during cooling through the miscibility gap. The metal elements Co and Cu are mainly concentrated in the Zr-rich and Ce-richliquids, respectively, which results in the formation of the two coexistent Zr-Co-rich and Ce-Cu-rich liquids. It was found that the coexistent Zr-Co-rich and Ce-Cu-rich liquids undergo liquid-to-glass transition and thus form dual glassy phases under the rapid quenching, respectively. The effects of the atomic ratio of Co and Cu, the addition amount and the cooling rate on the formation of the glassy phases have been discussed in detail by combining the experimental investigation with the thermodynamic analysis. A strategy for synthesizing liquid-phase-separated metallic glasses on the basis of suitably designed immiscible alloys has been proposed. Two-glassy-phase alloys can be obtained by rapidly quenching alloy melt in which the atomic ratio of Co and Cu and the addition amount are 4:1 and 38.5%, respectively.
Keywordliquid-liquid phase separation Zr-Ce immiscible alloy rapid quenching two-glassy-phase alloy microstructure
Funding OrganizationNational Natural Science Foundation of China ; Natural Science Foundation of Liaoning Province
DOI10.11900/0412.1961.2016.00056
Indexed BySCI
Language英语
Funding ProjectNational Natural Science Foundation of China[51374194] ; National Natural Science Foundation of China[51574216] ; National Natural Science Foundation of China[51271185] ; Natural Science Foundation of Liaoning Province[2015020172]
WOS Research AreaMetallurgy & Metallurgical Engineering
WOS SubjectMetallurgy & Metallurgical Engineering
WOS IDWOS:000390080800003
PublisherSCIENCE PRESS
Citation statistics
Cited Times:4[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/123461
Collection中国科学院金属研究所
Corresponding AuthorHe Jie
Affiliation1.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China
2.Dalian Univ Technol, Sch Mat Sci & Engn, Dalian 116024, Peoples R China
Recommended Citation
GB/T 7714
Wang Zhongyuan,He Jie,Yang Baijun,et al. LIQUID LIQUID PHASE SEPARATION AND FORMA TION OF TWO GLASSY PHASES IN Zr-Ce-Co-Cu IMMISCIBLE ALLOYS[J]. ACTA METALLURGICA SINICA,2016,52(11):1379-1387.
APA Wang Zhongyuan.,He Jie.,Yang Baijun.,Jiang Hongxiang.,Zhao Jiuzhou.,...&Hao Hongri.(2016).LIQUID LIQUID PHASE SEPARATION AND FORMA TION OF TWO GLASSY PHASES IN Zr-Ce-Co-Cu IMMISCIBLE ALLOYS.ACTA METALLURGICA SINICA,52(11),1379-1387.
MLA Wang Zhongyuan,et al."LIQUID LIQUID PHASE SEPARATION AND FORMA TION OF TWO GLASSY PHASES IN Zr-Ce-Co-Cu IMMISCIBLE ALLOYS".ACTA METALLURGICA SINICA 52.11(2016):1379-1387.
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