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Ex Quiz 1 Soln 1 - Metals and Alloys[30 points la Sketch...

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Unformatted text preview: Metals and Alloys [30 points] la.) Sketch the conventional unit cell for the face centered cubic (FCC) structure A, b.) The number density (i. e. number of atoms per unit volume) for the FCC structure in terms of the lattice parameter a is: (circle one) i.) 1m:3 ii.) 2/a3 iv.) 8/a3 c.) The most densely packed planes (1'. e. having the highest planar atomic density) in the FCC structure belong to the family (circle one) i.) {100} ii.) {110} iv.) {121} d.) The close packed direction in this structure is along (tick one) ....... the edge of the unit cell ...L/u the face diagonal of the unit cell ....... the body diagonal of the unit cell e.) Given that Au has an atomic radius of O. 144nm, calculate the number of unit cells that are present in a cubic centimeter of FCC Au. .0! plies: LH' 2) 0" = ‘35—. 3‘0““ 2 04“):th : O'l-KH-xto 'M Fri fl 3 13 a v2“ ' Vowel- «Q ml: ecu = (0-u01mo ") «a = (rum: «3 s 65H. no m3 ‘3 l N” '3 “fit" u.\\S V“ cm = / 41 , “,3 ”on 5.14; no '11- 3 Answer: \u3x\0 “N‘cd‘, ./ SM ...
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