Chapter4 hw

# Chapter4 hw - Chapter 4 Problem 21 Calculate the radius of...

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Unformatted text preview: Chapter 4, Problem 21 Calculate the radius of the largest interstitial void in the BCC (1 iron lattice. The atomic radius of the iron atom in this lattice is 0.124 11m, and the largest interstitial voids occur at the (V4, V2, 0); (1/2, 3/2, 0); (3/4, 1/2, 0); (V2, %, 0), etc., type positions. Chapter 4, Solution 21 For BCC crystal structure, _g_ 400.124 run) “1/3 J3 Letting x = Fe atom radius + Interstitial void radius, 20.286 mm x2 2:02 +102 :36? 16 4 16 ’5 x = Ea = 0.5590 = (0.559)(0.286 mm) = 0.160 nm The interstith void radius is thus, Rm-a1 =x—RFQ =0.160 DID—0.124 nm=0.036nm ...
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