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Q. Explain the compositional defects.
Ans. Compositional Defect: This defect due to
(a) Alloying an element to original crystal.
(b) Impuring atom during original crystallization.
These defects are responsible for functioning of most semiconductor devices.
A substitutional impurity defect is also a point defect in which a foreign atoms that substitutes for a parent atom in the crystal lattice e.g. in bras, zinc is a substitutional atom in the copper.
A interstitial impurity is a small sized atom occupying space between the regularity positioned atoms.
the amount of cold working metal can withstand is directly related to which properties? name two and also discuss the effect that cold working has upon these properties?
Q. What are the secondary operations we apply in powder metallurgy methods. Give their use also. Ans. Secondary Processes of Manufacture : In addition to the basic proce
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