(a) For the solidification of iron, calculate the critical radius r* and the activation free energy ?G*...
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(a) For the solidification of iron, calculate the critical radius r* and the activation free energy ?G* if nucleation is homogeneous. Values for the latent heat of fusion and surface free energy are ???1.85 ?? 109 J/m3 and 0.204 J/m2, respectively. Use the supercooling value found in Table 10.1.
(b) Now calculate the number of atoms found in a nucleus of critical size. Assume a lattice parameter of 0.292 nm for solid iron at its melting temperature.
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a This portion of the problem asks that we compute r and G for the homogeneous nucleation of the sol...View the full answer
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Related Book For 
Fundamentals of Materials Science and Engineering An Integrated Approach
ISBN: 978-1118061602
4th Edition
Authors: David G. Rethwisch
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