Introduction to Materials Science |
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Page 14
... vacancies can move about in the crystal at high temperatures . A vacancy moves by interchanging with an atom . Thus an impurity atom ( such as phosphorus ) can diffuse into a pure silicon crystal by interchanging with the vacancies . It ...
... vacancies can move about in the crystal at high temperatures . A vacancy moves by interchanging with an atom . Thus an impurity atom ( such as phosphorus ) can diffuse into a pure silicon crystal by interchanging with the vacancies . It ...
Page 270
... vacancies just below Tm what is the vacancy concentration at Tm / 2 ? Answer . If then e - B / kBTm = 10-4 , e - 2E1 / kBTm = 10-8 . Note how very rapidly concentration varies with temperature . Vacancy concentrations in excess of the ...
... vacancies just below Tm what is the vacancy concentration at Tm / 2 ? Answer . If then e - B / kBTm = 10-4 , e - 2E1 / kBTm = 10-8 . Note how very rapidly concentration varies with temperature . Vacancy concentrations in excess of the ...
Page 411
... vacancy . Hence the concentration of sodium ion vacancies is [ Nav ] = [ Cd2 + ] + [ Cl ] . ( 9.10.8 ) At high temperatures , NaCl becomes an electrical conductor be- cause of the rapid exchange of the sodium ion vacancies with Na + ...
... vacancy . Hence the concentration of sodium ion vacancies is [ Nav ] = [ Cd2 + ] + [ Cl ] . ( 9.10.8 ) At high temperatures , NaCl becomes an electrical conductor be- cause of the rapid exchange of the sodium ion vacancies with Na + ...
Contents
MECHANICAL PROPERTIES | 59 |
ELECTRIC AND MAGNETIC PROPERTIES | 95 |
THERMAL AND CHEMICAL PROPERTIES | 151 |
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alloy aluminum ANSWERS TO QUESTIONS atoms band behavior bonds called carbon cell chain charge chemical coefficient composition concentration configuration constant cooled copper corrosion crystal structure crystalline cubic curve decreases density diamond cubic dielectric diffusion dipole direction discussed domain electrical electron equation equilibrium eutectic eutectoid EXAMPLE ferromagnetic field fraction fracture Gibbs free energy glass grain boundaries graphite heat Hence high temperatures hydrogen ions iron kbars kinetic lattice layer liquid magnetic martensite materials mechanical melting point metal mole molecules motion NaCl Note oxide p-n junction particles pearlite phase diagram plane plastic polymer potential energy precipitate pressure problem properties radius reaction room temperature semiconductor shear stress shown in Figure shows silicon sodium solid solubility solution steel strain strength superconductors surface Table tensile thermal tion transformation unit vacancies valence valence band velocity viscosity volume yield stress zero