Questions 1. A solvent is: a. Atoms of the primary atomic species b. Impurities

ID: 492152 • Letter: Q

Question

Questions 1. A solvent is: a. Atoms of the primary atomic species b. Impurities c, Interstitials d, Vacancies 2. It is common that cations transfer into interstitial sites since they are smaller in size compared to anions a. True b, False 3. Why are point defects formed? a. To decrease entropy in the system b. To favor a lower Gibbs Free Energy c, To decrease number of vacancies d .None of the Above 4. Diffusion in polymers is relatively easy in the crystalline region. a. True b. False 5. Slip is the process by which a dislocation motion produces a permanent deformation a. True b. False 6, Grain boundary defines the boundary between two grains of a. Two different phases b Two different compositions c,Two different orientations 7. The schematic on the right is an example of: e a. Stacking fault b, Dislocation climb c. Dislocation loop d, Mixed dislocation 8. Work Hardening is the process of strengthening through: a. Increase in dislocation density b. Precipitation, c. Increasing the number of solute atoms.

Explanation / Answer

A solvent is Atoms of the primary atomic species

true

Why are point defects formed?
a. To decrease entropy in the system
b. To favor a lower Gibbs Free Energy--answer
c. To decrease number of vacancies
d .None of the Above

false

false Slip is the process by which dislocation motion produces a permanent deformation

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Correct answerThe process by which plastic deformation is produced by dislocation motion is called slip(movement of dislocations).

Grain boundary defines the boundary between two grains of two different compositions.

grain boundary (GB) :

it is the interface between two grains, or crystallites, in a polycrystalline material.

Dislocation climb

Work hardening is the process of strengthening through

increase in dislocation density

Frenkel disorder :

For the Frenkel issue the prevalent deformities are either restricted to the cations and anions, and the confusion includes the nearness of equivalent quantities of opportunities and interstitial particles in a sublattice in a precious stone. In the arrangement of a Frenkeldefect combine, a cation on an ordinary site is exchanged to an interstitial site, and no new grid locales are made all the while.

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Precious stone imperfection insights is produced by limiting the Gibbs free vitality of deformity arrangement, which is regularly changed over to a crystallite estimate autonomous condition by applying Stirling's guess. Arrangements of this condition figure Arrhenius-like temperature reliance for the convergences of all deformity sorts, and higher imperfection populaces for nanocrystals because of the littler development free energies included. Here, we enhance the precision in the scientific handling of the condition portraying the deformity populace at thermodynamic balance and demonstrate that this condition is inherently estimate subordinate. The new model predicts bring down imperfection focuses for littler crystallites, and demonstrates that opportunity free crystallites littler than a definite basic size are thermodynamically steady at lifted temperatures.

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