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- W4383497802 abstract "We investigate the effect of composition of hypoeutectic Neopentylglycol-(D)Camphor alloy on nucleation and microstructure kinetics during alloy solidification in low gravity conditions without convection and buoyancy effects. Two alloys with compositions of 0.2 and 0.3 wt.-frac. DC have been solidified in a small thermal gradient to obtain equiaxed dendritic microstructures with different crystallographic growth orientation. In-situ optical and thermal characterization in the transparent material provided evolution of equiaxed dendrite density, nucleation undercooling, dendrite tip velocity and kinetic law. Significant differences in the results for the two compositions were found, which are discussed in relation to temperature and concentration dependent solid-liquid interfacial properties. For NPG-0.2 wt.-frac. DC equiaxed dendrites with 〈100〉 crystallographic growth orientation exist which tend to grow faster and fill the liquid volume quicker compared to the NPG-0.3 wt.-frac. DC alloy. This behavior hinders nucleation of further dendrites and decreases their final number. In contrast, for NPG-0.3 wt.-frac. DC equiaxed dendrites with 〈111〉 crystallographic growth orientation nucleate at higher undercooling and the kinetic law indicates smaller dendrite tip velocities correlated to a larger number of dendrites." @default.
- W4383497802 created "2023-07-08" @default.
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- W4383497802 date "2023-10-01" @default.
- W4383497802 modified "2023-09-26" @default.
- W4383497802 title "Effect of composition on nucleation and growth of equiaxed dendrites in the transparent alloy Neopentylglycol-(d)Camphor during solidification in microgravity conditions" @default.
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- W4383497802 doi "https://doi.org/10.1016/j.jcrysgro.2023.127350" @default.
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