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The presence of a particle in the melt ahead of a solidifying interface induces local interfacial deformations if the thermal conductivity of the particle (k p ) differs from that of the melt (k l ). Results of a stability analysis show that poor (good) heat conducting particles, k p /k l <1, (k p /k l >1) have a destabilizing (stabilizing) effect.
An unprecedented uniform distribution and dispersion of 6vol.% SiC nanoparticles (NPs) in Mg–Zn matrix is obtained through a novel solidification processing method that combines semisolid-state mechanical mixing and liquid-state ultrasonic processing. The resulting Mg-based metal matrix nanocomposites (MMNCs) exhibit the highest hardness and the greatest hardness enhancement among all crystalline...
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