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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1 3.8 (a) Formation of a conduction electron and an electron hole in pure silicon (
intrinsic semiconductor). Through the acquisition of thermal energy, an electron
attains a high enough energy to leave its valence position, (b) The process ...
Electron hole due to Al (with only three electrons in the outer shell) Si Si | Si Si i ^
Conduction band Si Al Si Si Eg Intrinsic x Ec 1 Electron hole —J— -o from , , , , ^
Valence band Si Si Si Si (a) (b) Fig. 13.10 (a) Structure of silicon with an ...
Energy gap, Eg The energy required to move an electron from the valence band
to the conduction band, usually expressed in ... In other words, at this level the
possible states that an electron or electron hole can occupy are half-filled.
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A General View of the Problems
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