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- W2357863410 abstract "Four different Ni-Pb binary monotectic alloys have been rapidly solidified during free fall in drop tube.With the decrease of droplet diameter,the primary α-Ni dendrite in Ni-20%Pb hypomonotectic droplets shows a morphology transition of coarse dendrite→equiaxed dendrite→vermiculate dendrite.The solidification microstructure of Ni-31.4%Pb monotectic alloy is mainly composed of monotectic cells,the volume fraction of which increases with the decrease of droplet diameter.Liquid phase separation has happened during the rapid solidification of both Ni-50%Pb and Ni-60%Pb hypermonotectic alloys.The grain size of L2(Pb) phase in Ni-50%Pb alloy increases and then decreases when the droplet diameter decreases.The microstructures of Ni-60%Pb alloy droplets display a core-shell→dendrite transformation as the droplet diameter becomes smaller than 400 μm.Theoretical analyses of Borelius model,Gibbs-Thomson equation and Lifshitz-Slyozov-Wagner(LSW) theory reveal that alloy composition,phase separation time and volume fraction of minor phase play important roles in the formation of core-shell microstructure." @default.
- W2357863410 created "2016-06-24" @default.
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- W2357863410 date "2011-01-01" @default.
- W2357863410 modified "2023-09-26" @default.
- W2357863410 title "Microstructure Formation Mechanism of Ni-Pb Monotectic Alloys Rapidly Solidified in Drop Tube" @default.
- W2357863410 hasPublicationYear "2011" @default.
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