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National Institute of Technology, Rourkela-769008 Mid-Semester Examination, 2018

This document is the mid-semester examination for an Advanced Materials course. It contains 7 questions related to advanced materials. Students must answer any 5 questions from questions 1-6, and question 7 is compulsory. The questions cover topics like piezoelectric materials, shape memory alloys, magnetostrictive materials, nanomaterials, carbon nanotubes, and superalloys. Students are asked to explain concepts, compare and contrast material properties, define terms, and describe classifications and phases within materials. The exam is worth a total of 30 marks and has a duration of 2 hours.

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190 views2 pages

National Institute of Technology, Rourkela-769008 Mid-Semester Examination, 2018

This document is the mid-semester examination for an Advanced Materials course. It contains 7 questions related to advanced materials. Students must answer any 5 questions from questions 1-6, and question 7 is compulsory. The questions cover topics like piezoelectric materials, shape memory alloys, magnetostrictive materials, nanomaterials, carbon nanotubes, and superalloys. Students are asked to explain concepts, compare and contrast material properties, define terms, and describe classifications and phases within materials. The exam is worth a total of 30 marks and has a duration of 2 hours.

Uploaded by

NitinSrivastava
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as PDF, TXT or read online on Scribd
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NATIONAL INSTITUTE OF TECHNOLOGY, ROURKELA-769008

MID-SEMESTER EXAMINATION, 2018

SESSION: 2017-2018
B. Tech. (7th Semester)

Subject code: MM442 Subject Name: Advanced Materials Dept. Code: MM


Credits [3-0-0] Full Marks: 30 Duration: 2 Hr.

Answer any FIVE questions from 1-6 and Question 7 is compulsory

Q. No. Particulars Marks


1 (a) Explain the working principle of Piezo-actuator and Piezo-
sensor. 4+1
(b) What are the differences between the piezoelectric material and
electrostriction materials?
2 (a) Describe the microstructural changes in temperature induced
NiTi smart alloy during loading-unloading cycle. Explain with
3+1+1
diagram.
(b) Why steel does not have shape-memory properties?
(c) What is two-way shape memory effect (SME)? Give an
example.
3 (a) Why NiTi alloys have demand in dental wire application.
Explain the associated mechanism. 2+3
(b) How there is a change in dimension with respect to change in
magnetic field in Magnetostrictive material. Explain.
4 (a) What is strain fixity rate?
(b) How MagnetoRheological fluid work? 1+1+3
(c) Differentiate between the top-down approach and bottom-up
approach.
5 (a) What happen with the thermal properties during reduction of
the particle size from 1000 nm to 10 nm. Explain. 1+1+2+1
(b) Why Optical properties will change during reduction of
particle size from macro to nano?
(c) Explain Graphite electrode sooty method for synthesis of
fullerene.
(d) What are the common defects found in CNT.

P.T.O.
6 (a) Define supperalloy?
1+3+1
(b) How supperalloy increase their strength with increase in
temperature? Explain with example.
(c) What is the major role of addition of B & Y in superalloy?
7 Briefly describe: (Any Two)
(I) Classification of CNT 2.5x2
(II) Different phases in Ni-based Superalloys
(III) Effect of Topologically Close Packed Phases

………………………………………………………Best of Luck………………………………………………………………

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