AMME1362 Chapter Notes - Chapter 4: Interstitial Defect, Solid Solution, Electronegativity
11 Oct 2018
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Where n is the total number of atomic sites, and. Qv is the energy required for the formation of a vacancy. 4. 3 impurities in solids: all the crystalline structures contain impurities, alloys are used in metals to improve mechanical strength and corrosion resistance. Solid solutions-forms when, a solute is atoms are added to the host material (solvent), the crystal structure is maintained and no new structures are formed. Impurity point defects are found in solid solutions, of which there are two types: substitutional and interstitial. For the substitutional, the solute or impurity atoms replace or substitute for the host atoms. Several features of the solute and solvent atoms determine the degree to which the former dissolves in the later, as follows: atomic size factor. Chapter 4-imperfections in solids: crystal structure, electronegativity, valences. This is sometimes terms the dislocation line: screw dislocation-formed by a shear stress that is applied to produce the distortion.
