Using the ‘solidification path’ technique, the liquidus projection of Sn rich corner of the Cu–Ni–Sn phase diagram was determined. Two quasi-peritectic reactions were found, which are related to the Cu–Sn and Ni–Sn binary eutectic reactions in this part of the system. The existence of a ternary Cu–Ni–Sn phase was confirmed. This phase was found to participate in both quasi-peritectic reactions.
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