Phase Equilibria of the Sn–Ni–V System: The 980°C Isothermal Section and the Sn-Rich Corner at 600°C and 300°C

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• 作者：Changjun Wu ; Xuping Su ; Haoping Peng ; Ya Liu ; Hao Tu…
• 关键词：Sn–Ni–V ; phase equilibria ; intermetallics ; Pb ; free solders
• 刊名：Journal of Electronic Materials
• 出版年：2015
• 出版时间：October 2015
• 年：2015
• 卷：44
• 期：10
• 页码：3904-3913
• 全文大小：2,124 KB
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• 作者单位：Changjun Wu (1) (2)
  Xuping Su (1) (2)
  Haoping Peng (1) (3)
  Ya Liu (1) (2)
  Hao Tu (1) (2)
  Jianhua Wang (1) (2)
  
  1. Jiangsu Key Laboratory of Materials Surface Science and Technology, Changzhou University, Changzhou, 213164, Jiangsu, People’s Republic of China
  2. Key Laboratory of Advanced Metal Materials of Changzhou City, Changzhou University, Changzhou, 213164, Jiangsu, People’s Republic of China
  3. School of Petroleum Engineering, Changzhou University, Changzhou, 213164, Jiangsu, People’s Republic of China
  
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Chemistry
  Optical and Electronic Materials
  Characterization and Evaluation Materials
  Electronics, Microelectronics and Instrumentation
  Solid State Physics and Spectroscopy
  
• 出版者：Springer Boston
• ISSN：1543-186X

文摘

Ternary Sn–Ni–V alloys were prepared and annealed at 980°C, 600°C, and 300°C for 15, 60 and 60 days, respectively. The annealed alloys were metallographically examined and the equilibrium phases formed were identified on the basis of determination of composition and x-ray diffraction analysis. The isothermal region of the ternary Sn–Ni–V system at 980°C was studied. Nine three-phase regions and more than 20 conjugate lines were detected at 980°C. The range of composition of VNi<sub>2sub>Sn at 980°C spans 24.5-9.2 at.% V, 52.1-5.5 at.% Ni, and 15.3-3.4 at.% Sn. Its lattice constant increases with increasing V content. A sharp increase near 40.4 at.% V is indicative of a second-order transition. It is believed that atomic site occupation changed when the V content was >40.4 at.%. The maximum solubility of V in Ni<sub>3sub>Sn<sub>2sub> can reach 23.3 at.%; that in Ni<sub>3sub>Sn is below 0.6 at.%. Up to 3.4 at.% Ni dissolves in V<sub>3sub>Sn. The Sn-rich corner of the Sn–Ni–V system at 600°C and 300°C was also investigated experimentally. The solubility of Ni in VSn<sub>2sub> and V in Ni<sub>3sub>Sn<sub>4sub> at 600°C and 300°C are both less than 0.5 at.%. Keywords Sn–Ni–V phase equilibria intermetallics Pb-free solders