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- W2034602776 abstract "An adsorption model has been developed to describe the heterogeneous nucleation of solidification in an A–B eutectic or monotectic alloy system. The interface between A-rich α solid and B-rich liquid is treated as a mixture of A solid, B solid, A liquid and B liquid atoms, randomly distributed as a monolayer between the two phases. The interfacial energy is calculated by summing pairwise bonding energies, and is then minimised to determine the equilibrium interface solid fraction and composition. With decreasing temperature, the interface monolayer changes sharply from liquid to solid, with a composition close to pure B. This sharp onset of interface adsorption of solid B atoms corresponds to α acting as a catalyst for the heterogenous nucleation of B-rich β solid. Adsorption close to the eutectic temperature and therefore efficient nucleation catalysis is promoted by a large difference between the melting points of A and B, and a small difference between the solid and liquid immiscibilities of A and B. Predicted undercoolings for the onset of adsorption and nucleation catalysis can be obtained directly from simple phase diagram data, and give good agreement with previous measurements in the AgPb and AlSn alloy systems." @default.
- W2034602776 created "2016-06-24" @default.
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- W2034602776 date "1994-09-01" @default.
- W2034602776 modified "2023-10-17" @default.
- W2034602776 title "An adsorption model of the heterogeneous nucleation of solidification" @default.
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- W2034602776 doi "https://doi.org/10.1016/0956-7151(94)90409-x" @default.
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