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Unformatted text preview: 1 Materials Science and Engineering 280B Practice Exam 2 Professor Moonsub Shim Time allowed: 1 hour Total Credit: 100 points Write your name on the first pages and initial all other pages . Answer all parts of all questions concisely and completely. Show your work for full credit. Problems have different values (Do not spend too much time on any given problem). This test is closed book, closed notes (You may use only the data given in this exam. You may not use your neighbor). If you use back pages of the exam, indicate so. If you use extra papers, make sure they are attached with your name on them. Including this cover page, there are 5 pages to this exam. Avogadros Number = 6.022 x 10 23 mol-1 Name: __________________________________________ Name: _________ 2 Imperfections Equilibrium number of vacancies: Composition specification for solid solutions: Average density: Diffusion dx dc D J = = x c D x t c Solution to Ficks 2 nd law: = Dt 2 x erf 1 c c c c o s o x = RT Q exp D D d o R = 8.31 J/mol-K Mechanical properties o A F = , o o i l l l =...
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This note was uploaded on 03/15/2010 for the course MSE 280 taught by Professor Johnson during the Fall '08 term at University of Illinois, Urbana Champaign.
- Fall '08
- Materials Science And Engineering