M.Sc. DEGREE EXAMINATION, APRIL 2016
Fourth Semester
Physics
MATERIALS SCIENCE
(2011 onwards)
Time 3 Hours Maximum 75 Marks
Part A (10 2 20)
Answer all questions.
1. Define viscoelasticity.
2. How do the metals get corroded?
3. State the law of diffusion.
4. What is meant by lattice misfit?
5. Draw the energy level diagram of He-Ne laser.
6. The indirect band semiconductors do not lase. Why?
7. Name a few carbon matrix composites.
8. Define the polymer-matrix composite.
9. What are glassy materials?
10. Define the acoustic optical effect.
Sub. Code
521403
RW-10850
2
Wk 7
Part B 5 25)
Answer all questions choosing either or
11. Explain the process of addition polymerization.
Or
Discuss about the corrosion resistive materials.
12. How are the thin films fabricated by thermal
evaporation method?
Or
Discuss about the preparation of thin films by liquid
phase epitaxy method.
13. How does the lasing action take place in a dye
laser?
Or
Explain the lasing action in He-Cd laser.
14. Discuss about the cement-matrix composite.
Or
Explain the ceramic-matrix composite.
15. Discuss about the novel properties of shape memory
alloys.
Or
Explain the preparation of Nitinol alloys.
RW-10850
3
Wk 7
Part C 10 30)
Answer any three questions.
16. Discuss about the relationship between the structure and
the properties of polymers.
17. Explain the applications of Compound semiconductors
18. Describe the lasing action in CO2 laser.
19. Discuss in detail about the applications of composites.
20. Discuss the applications of MEMS to micro-actuators and
micro accelerometers.