M.Sc. DEGREE EXAMINATION, APRIL 2017
Fourth Semester
Physics
MATERIALS SCIENCE
(2013 onwards)
Time 3 Hours Maximum 75 Marks
Section A (10 x 2 20)
Answer all questions.
All questions carry equal marks.
1. Sketch the structure of polythene.
2. How can we avoid corrosion of materials?
3. What is meant by imperfection in thin films?
4. Mention the advantages of thermal evaporation method.
5. What is the energy of Ruby laser?
6. Point out any two applications of photorefractive
materials.
7. Define polymer matrix composites.
8. What are the thermal properties of ceramic matrix
composites?
9. What is
10. What are micro accelerometers?
Sub. Code
521403
RW-180
2
Ws5
Section B x 5 25)
Answer all questions choosing either or
11. Write a note on addition and condensation
polymerization.
Or
Explain viscoelastic behaviours of materials.
12. Discuss gas transport and pumping.
Or
Write a short note on lattice miofit and
imperfection.
13. Describe the working of AI Ga As semiconductor
laser.
Or
Describe the action of second harmonic generator.
14. Briefly explain composite materials.
Or
Discuss the structural properties of composites.
15. State shape memory alloy and write a short note on
one way-memory effect.
Or
Write a paragraph about the fabrication of piezo
electric MEMS materials.
RW-180
3
Ws5
Section C x 10 30)
Answer any three questions.
All questions carry equal marks.
16. Discuss corrosion of metals and corrosion resistance
materials. Mention a few applications.
17. Discuss liquid phase epitaxy and vapour phase epitaxy.
18. Explain the construction and working of dye and
chemical lasers with neat diagrams.
19. Describe the electrical properties of composite materials.
20. Explain MEMS and the fabrication of silicon oxide based
MEMS.
————————