How much impact does a nucleation barrier can create to the solidifica – McqOptions

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1.	How much impact does a nucleation barrier can create to the solidification when melt has approximately the same composition as the base metal, wetting of the base metal is very efficient?
A.	It can increase the undercooling
B.	It can decrease the rate of undercooling
C.	It can melt the base metal
D.	No major effect
Answer» E.

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