Interfacial reactions in In-Sn/Ni couples and phase equilibria of the In-Sn-Ni system |
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Authors: | Ching-Yu Huang Sinn-Wen Chen |
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Affiliation: | (1) Department of Chemical Engineering, National Tsing-Hua University, Hsin-Chu, Taiwan 300, Republic of China |
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Abstract: | The In-Sn-Ni alloys of various compositions were prepared and annealed at 160°C and 240°C. No ternary compounds were found;
however, most of the binary compounds had extensive ternary solubility. There was a continuous solid solution between the
Ni3Sn phase and Ni3In phase. The Sn-In/Ni couples, made of Sn-In alloys with various compositions, were reacted at 160°C and 240°C and formed
only one compound for all the Sn-In alloys/Ni couples reacted up to 8 h. At 240°C, Ni28In72 phase formed in the couples made with pure indium, In-10at.%Sn and In-11at.%Sn alloys, while Ni3Sn4 phase formed in the couples made of alloys with compositions varied from pure Sn to In-12at.%Sn. At 160°C, except in the
In/Ni couple, Ni3Sn4 formed by interfacial reaction. |
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Keywords: | Interfacial reactions phase equilibria In-Sn Ni lead-free solder |
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