Coatings and Surface Engineering

Surface coatings protect critical components across aerospace, energy, manufacturing, and infrastructure — thermal barrier coatings on turbine blades, wear-resistant coatings on cutting tools, corrosion protection on marine structures, optical coatings on precision instruments. Coating design involves simultaneous optimization of composition, layer architecture, interface adhesion, and process compatibility, creating a multi-dimensional design space that empirical development explores inefficiently. A single multilayer coating system involves choices across dozens of composition variables, layer thicknesses, interface treatments, and deposition parameters. The performance requirements are often contradictory — maximizing hardness while maintaining ductility, achieving thermal insulation while ensuring thermal cycling resistance — demanding generation approaches that handle coupled objectives natively.

Current coating development follows established design methodologies for known material systems — nitrides, carbides, oxides — with incremental compositional variations and process parameter optimization. Novel coating architectures are developed through costly experimental campaigns involving systematic deposition, characterization, and accelerated testing. Computational approaches are limited to phase stability predictions and simplified mechanical property estimates for individual layers, without capturing the interface adhesion, residual stress, and multilayer interaction effects that govern real-world coating performance. The gap between single-layer property prediction and full coating system behavior leaves the most important design decisions — layer sequence, thickness ratios, gradient profiles — to empirical optimization.