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Question 1) Construct the Kroger Vink diagram for the compound Cu2O where the principal defects are Schottky

defects(copper vacancies are singly ionized and oxygen vacancies are doubly ionized). Question 2) Some alloys can become hot short when one phase wets the grain boundaries of a metal or alloy. In the case of nickel, when the sulfur concentration is high, liquid NiS can be formed. Given sigma(grainboundary, nickel)=2sigma(Ni/NiS), would you expect to have hot shortness in nickel when the sulfur concentration is high enough to form NiS?

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