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Thermodynamic investigation of the Mg-Ni-Zn system by experiments and calculations and its application

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成果类型:
期刊论文
作者:
Xu, Kai;Liu, Shuhong*;Du, Yong;Dreval, Liya;Cai, Gemei;Jin, Zhanpeng
通讯作者:
Liu, Shuhong
作者机构:
[Cai, Gemei; Xu, Kai; Jin, Zhanpeng] Cent S Univ, Sch Mat Sci & Engn, Changsha 410083, Hunan, Peoples R China.
[Xu, Kai; Jin, Zhanpeng; Liu, Shuhong; Dreval, Liya; Du, Yong] Cent S Univ, Natl Key Lab Sci & Technol Natl Def High Strength, Changsha 410083, Hunan, Peoples R China.
[Dreval, Liya] Mat Sci Int Serv GmbH, MSI, Wallgraben 100, D-70565 Stuttgart, Germany.
通讯机构:
[Liu, Shuhong] Cent S Univ, Natl Key Lab Sci & Technol Natl Def High Strength, Changsha 410083, Hunan, Peoples R China.
语种:
英文
关键词:
Ni-Zn;Mg-Ni-Zn;CALPHAD;Phase equilibria;Solidification
期刊:
JOURNAL OF ALLOYS AND COMPOUNDS
ISSN:
0925-8388
年:
2019
卷:
784
页码:
769-787
文献类别:
WOS:Article
所属学科:
WOS学科类别:Chemistry, Physical;Materials Science, Multidisciplinary;Metallurgy & Metallurgical Engineering
入藏号:
基金类别:
National Key Research and Development Plan [2016YFB0701202]; State Key Laboratory Foundation of Central South University of China
机构署名:
本校为第一且通讯机构
院系归属:
材料科学与工程学院
摘要:
Ni and Zn are important alloying elements in Mg-based structural materials and hydrogen storage alloys. The isothermal section of the Mg-Ni-Zn system at 400 degrees C was investigated by means of X-ray diffraction (XRD) analysis and electron probe microanalysis (EPMA). The NiZn3 phase was observed to be stable in the as-cast and annealed Ni25Zn75 and Ni23Zn77 alloys. The experimental results confirmed the existence of the ternary tau compound at 400 degrees C. NiZn3, Mg2Zn3, Mg2Ni, MgZn2, MgNi2, and tau show significant homogeneity ranges in the ternary system. The Mg2Zn11 phase is being stabilized in the ternary system at temperatures higher than the melting point of this compound in the Mg-Zn binary system. In the frameworks of the CALPHAD approach, the Ni-Zn system was re-optimized and the thermodynamic description for the Mg-Ni-Zn system was thermodynamically assessed for the first time. The obtained thermodynamic models reasonably reproduce the experimental data on the phase equilibria and thermodynamic properties of the phases. The solidification paths of the representative Mg-Ni-Zn alloys were predicted within the Scheil-Gulliver model using the thermodynamic assessment performed in the present work. The results of the Scheil-Gulliver modeling are in agreement with the EPMA results. (C) 2019 Elsevier B.V. All rights reserved.
参考文献:
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AKIBA E, 1991, J LESS-COMMON MET, V172, P1071, DOI 10.1016/S0022-5088(06)80014-7
ALI SA, 1972, ZH FIZ KHIM+, V46, P2514
ANANTATMULA RP, 1974, METALL TRANS, V5, P605, DOI 10.1007/BF02644656

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