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Chapter+4+Study+Guide - Study Guide Chapter 4 Point Defects...

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Study Guide- Chapter 4 Point Defects- what are the types of defects in metals, ionic materials, covalent, and mixed ionic/covalent materials. Even though it requires energy to create a vacancy, there is a concentration of defects that can be calculated based on thermodynamic arguments. Explain how these arguments work when describing the equilibrium vacancy concentration in a metal. Know the temperature dependence for vacancy concentration in a metal. What are the two types of impurity defects that can form in a metal?
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Study Guide- Chapter 4, Continued What are Hume-Rothery’s Rules? How are they applied? In an ionic material, what restrictions limit the nature of the defects? Know the difference between Schottky and Frenkel defects and the temperature dependence of their respective concentrations. What is a co-polymer? Where do impurities tend to segregate in a crystalline polymer? Compare the segregation effects in a crystalline polymer to a polycrystalline metal or ceramic material.
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