Questions
Quick questions
You should be able to answer these questions without too much difficulty after studying this TLP. If not, then you should go through it again!
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What is meant by a "misfit strain"?
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Why does curvature tend to arise in a coating-substrate system, as a result of the stresses in each constituent caused by imposing a force balance?
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Which of these conditions is sufficient to ensure that the Stoney equation is a good approximation for the relationship between coating stress and curvature?
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What is meant by the "Biaxial Modulus" of a coating (or a substrate) and why is it greater than the conventional (Young's modulus)?
Deeper questions
The following questions require some thought and reaching the answer may require you to think beyond the contents of this TLP.
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How is the neutral axis (strictly, the neutral plane) of a beam defined?
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Which of these definitions of the curvature of a beam is correct?
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Which of these statements regarding debonding (spallation) of coatings is incorrect?