Liquid-liquid phase separation and remixing in the Cu-Co system
Liquid-liquid phase separation and remixing in the Cu-Co system
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DOI：
10.1007/bf02586210
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发表时间：
2006-08-01
影响因子：
2.8
通讯作者：
Battezzati, L.
中科院分区：
文献类型：
--
作者：
Curiotto, S.;Pryds, N. H.;Battezzati, L.
本文讨论 Cu-Co 体系中的亚稳态液-液分离。通过差示扫描量热法研究了几种不同成分的样品。通过玻璃助熔技术实现了相对于液相线的高过冷度。将合金进行多次加热和冷却循环，以确定液-液分离和再混合的温度。对于每种组合物，发现分层和再混合温度是相等的。进行液相分离的成核率计算来解释实验结果。发现 Cu-Co 系统中的液-液分离是一个成核过程，在双节线以下没有可检测到的过冷。
This article deals with the metastable liquid-liquid separation in the Cu-Co system. Several samples with different compositions were investigated by differential scanning calorimetry. High undercooling with respect to the liquidus was reached by means of the glass fluxing technique. The alloys were cycled with several heating and cooling runs in order to determine the temperature of the liquid-liquid separation and of the remixing. For each composition, demixing and remixing temperatures were found to be equal. Nucleation rate calculations of the liquid phase separation were carried out to explain the experimental results. The liquid-liquid separation in the Cu-Co system was found to be a nucleation process occurring with no detectable undercooling below the binodal line.