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Calculate the change in free-energy associated with the formation of a critical spherical nucleus in pure liquid nickel that is 200 ºC under cooled. Properties of Nickel: Heat of Fusion 2660 J/cm3; Surface Energy 255x10-7 J/cm2 ; Freezing Temperature 1453 ºC, Volume Free Energy -728.99 J/cm3
The typical under cooling of nickel for homogenous nucleation is 480 °C. With this amount of under cooling, how many nickel atoms need to group together spontaneously to from a nucleation site? Assume the lattice parameter of solid FCC nickel is 0.356nm.
calculate the percentage volume change that would occur if a material were to be transformed from fcc to bcc. assume
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Assuming that you are a process engineer in charge of melting and casting for making an alloy that consists of 40 at% Ag and 60 at% Ni. Calculate how many grams of Ag and Ni you need to weigh to make a 400-gram solder alloy with such a composition. G..
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