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a.Why might a single crystal ceramic material have different coefficients of linear expansion depending on the...

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Mechanical Engineering

a.Why might a single crystal ceramic material have differentcoefficients of linear expansion depending on the crystallographicdirection (anisotropy)?

b. In metals, thermal expansion and electrical conductivity maybe related using equation the Weidemann-Franz law. Why is itpossible to relate these two phenomena in this way for metals andwhy does this relation not hold for ceramic and polymericmaterials?

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