Abstract
The effects of supercooling on the microstructure of Cu-Co alloys containing 10 to 65 wt pct Co were investigated. Supercooling of the alloys below a characteristic temperature,t SEP, resulted in a metastable phase separation into two liquids: one Co rich (L1) and the other Cu rich (L2). The microstructure of the phase-separated alloys consisted of spherulites of one phase embedded in a matrix of the other. The spherulites in alloys containing less than 40 wt pct Co were solidified from the L1 melt and from L2 in alloys containing more than 55 wt pct Co. Supercooling of copper alloys containing around 50 wt pct Co resulted in a duplex structure of fine and coarse dendrites. Microstructural evidence was presented for the formation of aε-Cu metastable phase in alloys containing less than 30 wt pct Co.
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Munitz, A., Abbaschian, R. Microstructure of Cu-Co alloys solidified at various supercoolings. Metall Mater Trans A 27, 4049–4059 (1996). https://doi.org/10.1007/BF02595654
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DOI: https://doi.org/10.1007/BF02595654