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Questions and Answers
What is a vacancy in a crystal lattice?
What is a vacancy in a crystal lattice?
- An atom with a different crystal structure
- An atom that replaces another atom in the lattice
- An atom that takes up an interstitial site
- An empty site where an atom is missing (correct)
In what type of solid solution do solute atoms replace the host atoms?
In what type of solid solution do solute atoms replace the host atoms?
- Interstitial
- Alloy
- Compound
- Substitutional (correct)
What factor determines whether a solute dissolves in a solvent in a substitutional solid solution?
What factor determines whether a solute dissolves in a solvent in a substitutional solid solution?
- Atomic mass difference
- Crystal structure similarity
- Electronegativity difference (correct)
- Valence number
What increases the equilibrium number of vacancies in a material?
What increases the equilibrium number of vacancies in a material?
According to the Hume-Rothery rules, what must be the atomic size difference for appreciable solid solubility in a substitutional solid solution?
According to the Hume-Rothery rules, what must be the atomic size difference for appreciable solid solubility in a substitutional solid solution?
What type of dislocation is formed by an extra portion of a plane of atoms within the crystal?
What type of dislocation is formed by an extra portion of a plane of atoms within the crystal?
In which type of dislocation are the magnitude and direction of the lattice distortion expressed in terms of a Burgers vector?
In which type of dislocation are the magnitude and direction of the lattice distortion expressed in terms of a Burgers vector?
What is the characteristic visual appearance of a dislocation under a microscope?
What is the characteristic visual appearance of a dislocation under a microscope?
What type of stress is thought to form a screw dislocation?
What type of stress is thought to form a screw dislocation?
What term is used to describe dislocations that exhibit components of both edge and screw types?
What term is used to describe dislocations that exhibit components of both edge and screw types?
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