Influence of Surface Roughness on Reflectivity and Laser Ablation Resistance of Cold-Sprayed Copper Coatings
Year: 2025
Type: conference-paper
Abstract: Copper is widely used for its excellent thermal conductivity and high reflectivity, yet its response to laser irradiation is highly dependent on surface condition. While roughening bulk copper is known to enhance laser absorption, no data exists on cold-sprayed copper coatings. This study compares two surface conditions of cold-sprayed pure copper coatings, as-deposited and mirror-polished. Surface roughness, optical reflectivity, and response to a continuous-wave fiber laser at 1 kW/cm2 for 10 s were evaluated. Results reveal that the rough surface reflects less laser energy and experiences ablation than the polished one. These findings highlight the critical role of surface finish in laser resistance and offer guidance for optimizing copper coatings for high-energy laser applications.
Authors: Saiful Wali Khan, Ekta Singla, Harpreet Singh
Institution: Indian Institute of Technology Ropar
Language: English
Subfield: Computational Mechanics
Field: Engineering
Domain: Physical Sciences
Open Access status: diamond
OpenAlex ID: W4413287347