Development of laser ablation resistant coatings: A review on materials and methods

High-energy laser (HEL) irradiation can induce severe thermal and structural damage in aerospace and defense materials through rapid heating, oxidation, melting, vaporization, and ablation. Laser-ablation-resistant coatings are therefore essential for protecting critical structures exposed to extreme laser environments. This review critically examines laser-induced damage mechanisms in metals, polymer composites, and ceramic composites and evaluates material and coating strategies for improving laser-ablation resistance. Particular emphasis is given to metal-matrix, ceramic-matrix, ultra-high-temperature ceramic (UHTC), and polymer-based coatings, with protection mechanisms including laser reflection, sacrificial ablation, protective oxide-scale formation, transpiration cooling, and high-temperature stability. The effects of laser parameters, material properties, microstructure, and coating architecture on damage evolution and protection performance are discussed. A property-based comparison of UHTC constituents is presented to support material selection, while multilayer and functionally graded architectures are discussed as potential strategies for combining complementary protection mechanisms. Finally, key challenges and future directions, including adhesion, scalable deposition, wavelength-dependent reflectivity, repairability, and multifunctional and intelligent responsive coatings, are identified. Overall, this review provides an integrated framework linking laser-material interactions, material selection, protection mechanisms, and coating architecture to guide the development of next-generation laser-ablation-resistant coatings.