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Unformatted text preview: Anisotropy Amorphous materials/glasses Polymer structure (part amorphous, part crystalline) Chain-folding Dimensions/examples of defects Intrinsic point defects (vacancies) Extrinsic point defects (interstitial, substitutional) Role of point defects in diffusion Donor and acceptor doping of silicon (periodic table columns III, IV, V) Zone-refining of silicon Chemical vapor deposition Dislocations—edge and screw Role of dislocations in slip Stress and strain Stiffness (Young’s modulus) Relative stiffness of materials Yield stress or strength Ultimate tensile strength Failure stress Role of dislocations in yield strength Whiskers—eliminating dislocations Impeding dislocation motion—work hardening, solid solution hardening, grain refining, precipitation hardening Recovery Recrystallization Aluminum alloys (age- or precipitation-hardened) High strength low alloy (HSLA) steels Density...
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- Spring '11