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Unformatted text preview: Exam II MSE2001D Spring 2011 Name_~ __ P-_~ /__ ~__ t._V_Y1_-tO_ _/V_.s __ 1. (25 pts) Fill in the blanks (a)Linear defects such as dislocations control slip (mechanical deformation) in crystalline solids. Name two types of dislocations~%S, . ~ n h ) ~ . Slip occurs on do ~e-S+ pc::tc.-~ planes and C (J -( tu--~, ~.~~ directions. (b) Adjacent grains in polycrystalline materials can have small and/or high misorientations. The grain boundary misorientation can occur in three different ways. Name them d . .: ,Th.~ ,-h....,...;,o::t-. ~ "} (c)Give two examples of volumetric defects ~ , ~s. . cc.rC o (d) What is diffusion? blfuS/fM ~ Y I'\.~ S S kn..-afla:cl:- ~ c.:t.. \J a..... A. ~ ,. e..r ~e.- Name at least one industrial application of diffusion S J Z .' ck..c.-\W .~~ ,.,-Jr ' . (e) Stacking faults are plo..Y\4\f' defects. Surfaces are another type of this defect. 0--< L P (f) Point defects in metal-nonmetal compounds are formed by pairs of vacancies or an interstitial/vacancy pair because of needed charge compensation. One of them is the Schottky defect, what is the other one called? Y0C-V\. \u0c d-e.. (g) Diffusion of one element into another is called l.VI G(",ck.. LCt-(\ ....
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