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Questions and Answers
What are the two essential conditions for an atom to make a move during diffusion?
What are the two essential conditions for an atom to make a move during diffusion?
- Presence of lattice distortion and vacancy
- Presence of interstitial position and lattice vibration
- Presence of empty adjacent site and sufficient energy (correct)
- Presence of impurity atoms and high temperature
What is the name of the mechanism that involves the interchange of an atom from a normal lattice position to an adjacent vacant lattice site?
What is the name of the mechanism that involves the interchange of an atom from a normal lattice position to an adjacent vacant lattice site?
- Interstitial diffusion
- Self-diffusion
- Vacancy diffusion (correct)
- Impurity diffusion
What is the prerequisite for vacancy diffusion to occur?
What is the prerequisite for vacancy diffusion to occur?
- Presence of impurity atoms
- Presence of lattice distortion
- Presence of vacancies (correct)
- Presence of interstitial positions
What happens to the diffusing atoms and vacancies during vacancy diffusion?
What happens to the diffusing atoms and vacancies during vacancy diffusion?
What type of diffusion involves atoms migrating from an interstitial position to a neighboring empty one?
What type of diffusion involves atoms migrating from an interstitial position to a neighboring empty one?
What is a necessary condition for significant concentrations of vacancies to exist in metals?
What is a necessary condition for significant concentrations of vacancies to exist in metals?
Which type of diffusion occurs when impurity atoms substitute for host atoms?
Which type of diffusion occurs when impurity atoms substitute for host atoms?
What is the direction of motion of vacancies during vacancy diffusion?
What is the direction of motion of vacancies during vacancy diffusion?
What is the name of the process that involves the movement of atoms in a lattice?
What is the name of the process that involves the movement of atoms in a lattice?
What is the result of the interaction between diffusing atoms and vacancies during vacancy diffusion?
What is the result of the interaction between diffusing atoms and vacancies during vacancy diffusion?
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