Engineering Materials And Their Applications
This edition of the classic text/reference book has been updated and revised to provide balanced coverage of metals, ceramics, polymers and composites. The first five chapters assess the different structures of metals, ceramics and polymers and how stress and temperature affect them. Demonstrates how to optimize a material's structure by using equilibrium data (phase diagrams) and nonequilibrium conditions, especially precipitation hardening. Discusses the structures, characteristics and applications of the important materials in each field. Considers topics common to all materials—corrosion and oxidation, failure analysis, processing of electrical and magnetic materials, materials selection and specification. Contains special chapters on advanced and large volume engineering materials plus abundant examples and problems.
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Therefore, instead of having the sharp energy level of the single 3s electron in an
isolated sodium atom, a band of energy levels exists; hence the name "band
theory" (Fig. 13.26). It is postulated further that the number of energy levels in a ...
Diamond, therefore, is a good insulator, while the small number of conduction
band electrons in silicon and germanium leads us to call them semiconductors.
At this point we have a difficult question to answer about the existence of an
Metal A material with an unfilled valence band, leading to a very high
concentration of carriers. Insulator A material with a filled valence band and a
large energy gap between the valence band and the conduction band.
Semiconductor A ...
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A General View of the Problems
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