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Which of the following statements are true of vacancy or substitutional diffusion mechanism? (Check all that apply.) As the temperature of the solid increases, fewer
Which of the following statements are true of vacancy or substitutional diffusion mechanism? (Check all that apply.) As the temperature of the solid increases, fewer vacancies will be present, and the diffusion rate will decrease Vacancies lower the required activation energy for atomic movement There are always some vacancies present in metals or alloys as equilibrium defects. Diffusion of atoms in pure metals is called self-diffusion. Vacancies hinder diffusion by substitution
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