Consider two types of thermal barrier coatings made of Zirconia. The first A is pure Zirconia and the second B has a small % of yttrium added to it. Upon cooling a coating of either type from high temperature to room temperature, what of the following is the most likely outcome? Select one: a. A: stays stable; B: stays stable b. A: stays stable; B: experiences high stress, phase transformation and undergoes cracking; c. A: experiences high stress, phase transformation and undergoes cracking; B: stays stable d. A: experiences high stress, phase transformation and undergoes cracking; B: undergoes cracking and distortion

Consider two types of thermal barrier coatings made of Zirconia. The first A is pure Zirconia and the second B has a small % of yttrium added to it. Upon cooling a coating of either type from high temperature to room temperature, what of the following is the most likely outcome? Select one: a. A: stays stable; B: stays stable b. A: stays stable; B: experiences high stress, phase transformation and undergoes cracking; c. A: experiences high stress, phase transformation and undergoes cracking; B: stays stable d. A: experiences high stress, phase transformation and undergoes cracking; B: undergoes cracking and distortion

Welding: Principles and Applications (MindTap Course List)

8th Edition

ISBN:9781305494695

Author:Larry Jeffus

Publisher:Larry Jeffus

Chapter26: Welding Metallurgy

Section: Chapter Questions

Problem 19R

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