❣What is the size of atom that can just fit into the octahedral void and tetrahedral void for making interstitial solid solution in fcc based materials?❣
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Interstitial solid solutions form when the solute atom is small enough (radii up to 57% the radii of the parent atoms) to fit at interstitial sites between the solvent atoms. ... Carbon in iron (steel) is one example of interstitial solid solution.
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The octahedral void can accommodate fit a spherical atom of 0.52 A radius, whereas the tetrahedral void in the FCC gamma iron can accommodate fit an atom of 0.28 A radius.
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