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Week15Ch16_18

Week15Ch16_18 - Chapter 16,18 Composite and Electrical...

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Chapter 16,18: Composite and ISSUES TO ADDRESS Electrical Properties ISSUES TO ADDRESS... What are the classes and types of composites ? • How do we estimate composite stiffness & strength? How are electrical conductance and resistance characterized ? How do we estimate composite stiffness & strength? What are the physical phenomena that distinguish conductors, semiconductors, and insulators? For metals, how is conductivity affected by imperfections, T , and deformation? • For semiconductors how is conductivity affected Chapter 18 - 1 For semiconductors, how is conductivity affected by impurities (doping) and T ?
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Composites Combine materials with the objective of getting a more desirable combination of properties – Ex: get flexibility & weight of a polymer plus the strength of a ceramic Principle of combined action Mixture gives “averaged” properties – Mixture gives averaged properties Chapter 18 - 2
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