Chapter 18.4

Chapter 18.4 - Conductivity / Resistivity of Metals...

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16 MSE 2090: Introduction to Materials Science Chapter 18, Electrical Conductivity Conductivity / Resistivity of Metals Influence of plastic deformation : In general, presence of any imperfections (crystal defects) increases resistivity -- grain boundaries -- dislocations -- impurity atoms -- vacancies Normally, the influence of plastic deformation on electrical resistivity is weaker than the influence of temperature and impurities
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17 MSE 2090: Introduction to Materials Science Chapter 18, Electrical Conductivity Materials of Choice for Metal Conductors ¾ One of the best material for electrical conduction (low resistivity) is silver , but its use is restricted due to the high cost ¾ Most widely used conductor is copper : inexpensive, abundant, high σ , but rather soft – cannot be used in applications where mechanical strength is important. ¾ Solid solution alloying and cold working inprove strength but decrease conductivity. Precipitation hardening is preferred, e.g. Cu-Be alloy ¾ When weight is important one uses
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This note was uploaded on 02/14/2012 for the course MSE 2090 taught by Professor Leoindzhiglei during the Fall '10 term at UVA.

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Chapter 18.4 - Conductivity / Resistivity of Metals...

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