Coating Mechanics

This TLP should provide some insights into the mechanics of bi-layer (coating on substrate) systems. It covers the concept of a misfit strain and the way in which equilibrium is established after its introduction, including the creation of curvature. The differences between "thin" and "thick" coating cases are explained.

• Aims
• Before you start
• Introduction
• Misfit strains
• Force and moment balances
• The biaxial modulus
• The Stoney Equation - the Thin Coating Limit
• Spallation (Interfacial Debonding)
• Summary
• Questions
• Going further

Begin

First created: August 2017. Last updated: August 2017.

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