Design of Thermal Barrier Coatings A Modelling Approach [Paperback]

This book details the relationships between microstructure, interface roughness, and properties of thermal barrier coatings. The author proposes a method for the reduction of the thermal conductivity of the ceramic layer in order to increase the lifetime of thermal barrier coatings. He includes models for the optimization of ceramic layer microstructure and interface roughness.1Introduction1.1Scope and Limitations2Background2.1Thermal Spraying2.1.1Atmospheric Plasma Spraying2.1.2High Velocity Oxy-Fuel (HVOF) Spraying2.1.3Liquid Feedstock Plasma Spraying2.2Thermal Barrier Coatings2.3Coating Formation2.4Process Parameters2.5Coating Materials for TBCs2.5.1Topcoat2.5.2Bondcoat2.5.3Thermally Grown OxidesReferences3Characteristics of TBCs3.1Microstructure3.2Heat Transfer Mechanism3.2.1General Theory3.2.2Application to TBCs3.3Mechanical Behaviour3.3.1Stress Formation3.3.2Youngs Modulus3.3.3Nonlinear Properties3.4Interface Roughness3.4.1Roughness Relationship with Lifetime3.4.2Stress Inversion Theory3.5Oxide Formation3.6Failure MechanismsReferences4Experimental Methods4.1Microstructure Characterisation4.2Thermal Conductivity Measurements4.3Youngs Modulus Measurements4.4Roughness Measurements4.5Lifetime TestingReferences5Modelling of Properties of TBCs5.1Thermal Conductivity5.1.1Analytical Models5.1.2Numerical Models5.2Youngs Modulus5.2.1Analytical Models5.2.2Numerical Models5.3Finite Element Modelling5.3.1Basics of FEM and FDM5.3.2Image Based Finite Element Model5.4Artificial Coating Morphology Generator5.5Recent WorkReferences6Modelling of Interface Roughness in TBCs6.1Simplified Interface Roughness Modelling6.2Real Interface Roughness Modelling6.2.1Two-Dimensional Approach6.2.2Three-Dimensional Approach6.2.3ResultsReferences7Modelling of Oxide Growth in TBCs7.1Diffusion-based Modelling7.1.1Previous Work7.1.2Real Interface Roughness Modelling7.1.3Recent Work7.2Mixed Oxide GrowthReferences8Conclusions  How to Design TBCs?8.1Future Work

Mohit comes from Lucknow ilS0