a) Most familiar metals are not highly pure, rather they are alloys, in whichimpurity atoms have been added intentionally to the materials to impartspecific properties. Discuss with an example how the impurities affect theproperties of materials.b) Dislocation is a linear or one-dimensional crystalline defect of which there aretwo pure types i.e edge and screw dislocations.(i)(ii)Sketch the linear defect of screw dislocation within a crystal.Indicate the dislocation line and direction along which the dislocationline extends.5MATR 2381 Materials Science and.c) Calculate the number of vacancies per cubic meter in aluminum at 500 °C. Theenergy for vacancy formation is 0.75 ev/atom. The density and atomic weightfor aluminum are 2.62 g/cm? and 26.7 g/mol, respectively. (Boltzmann constant= 1.38 x 1023 J/atomK)d) Determine the composition in weight percent of Cu-30 at% Zn alloy.

Ans (a): The metals are not used in pure form. The impurity is added into the metal to improve its…

a) Most familiar metals are not highly pure, rather they are alloys, in which impurity atoms have been added intentionally to the materials to impart specific properties. Discuss with an example how the impurities affect the properties of materials.

a) Most familiar metals are not highly pure, rather they are alloys, in which impurity atoms have been added intentionally to the materials to impart specific properties. Discuss with an example how the impurities affect the properties of materials.

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

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Concept explainers

The Space Lattice and Unit Cells

Every matter consists of atoms, molecules, and ions. If these atoms, molecules, and ions (micro-particles) are represented in a three-dimensional space-occupying certain specific points in space, then these arrangements are termed as space lattices and the specific points which are being occupied by atoms, molecules and ions are termed as lattice points. The atoms, molecules, and ions at the lattice points are generally grouped in a regular fashion and repeat periodically at the three-dimensional space.

Question

a) Most familiar metals are not highly pure, rather they are alloys, in which
impurity atoms have been added intentionally to the materials to impart
specific properties. Discuss with an example how the impurities affect the
properties of materials.
b) Dislocation is a linear or one-dimensional crystalline defect of which there are
two pure types i.e edge and screw dislocations.
(i)
(ii)
Sketch the linear defect of screw dislocation within a crystal.
Indicate the dislocation line and direction along which the dislocation
line extends.
5
MATR 2381 Materials Science and.
c) Calculate the number of vacancies per cubic meter in aluminum at 500 °C. The
energy for vacancy formation is 0.75 ev/atom. The density and atomic weight
for aluminum are 2.62 g/cm? and 26.7 g/mol, respectively. (Boltzmann constant
= 1.38 x 1023 J/atomK)
d) Determine the composition in weight percent of Cu-30 at% Zn alloy.

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