Test3_2005 - First Name _ Last Name_ Student No_ November...

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First Name ________________ Last Name___________________ Student No__________________ November 23, 2005 Tutorial Section/TA__________________________ Page 1 of 3 MSE 101H1F Applied Science: Materials - Term Test #3 Total marks for all questions: 10 Marks are not equal for all questions – Marks are shown in left hand margin 1. Refer to the Sn-Au phase diagram on page 3. a) Complete the table below, following the example given, for the remaining 4 invariant points on the diagram. b) For point A on the Sn-Au phase diagram: i) What are the chemical compositions of all phases present? Liquid: 28wt% Au g (intermediate compound): 44wt% Au ii) What are the mass fractions of all phases present? Wt% Liquid: 4 4 40 10 0 25 4 4 28 wt% - ×= - Wt% g : 4 0 28 10 0 75 4 4 28 wt% - - c) For point B on the Sn-Au phase diagram: What are the chemical compositions of all phases present? d (intermediate compound): 62wt% Au z (intermediate solid solution): 90wt% Au What are the mass fractions of all phases present? Wt% d 9 0 80 10 0 36 9 0 62 wt% - - Wt% z 8 0 62 10 0 64 9 0 62 - - Type of invariant point Composition Temperature Reaction on heating peritectic 45wt% Au 300ºC g d + L
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This note was uploaded on 06/08/2010 for the course MSE MSE101 taught by Professor Proframsayscott during the Fall '03 term at University of Toronto- Toronto.

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Test3_2005 - First Name _ Last Name_ Student No_ November...

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