Reflectivity and laser irradiation of plasma sprayed Al coating

Lihong Gao; Zhuang Ma; Fuchi Wang; Wenzhi Li

doi:10.1117/12.2181605

4 May 2015 Reflectivity and laser irradiation of plasma sprayed Al coating

Lihong Gao, Zhuang Ma, Fuchi Wang, Wenzhi Li

Proceedings Volume 9543, Third International Symposium on Laser Interaction with Matter; 95430N (2015) https://doi.org/10.1117/12.2181605
Event: Third International Symposium on Laser Interaction with Matter, 2014, Jiangsu, China

Abstract

It's well known that Al has a very high reflectivity in the visible/near-infrared range, which makes it become a promising anti-laser material. But for a plasma sprayed coating, there are usually many defects, such as pores, cracks and interfaces among particles, which lead to properties difference with its bulk material. In this paper, the reflectivity of plasma sprayed Al coating and its laser irradiation effect were investigated. Its reflectivity, surface roughness, porosity, microstructure, and cross-section microstructure were characterized. The results show that a high reflectivity (98.1% at CO₂ laser 10.6μm wavelength) of plasma sprayed Al coating, which is comparable with bulk material, could be obtained. Its optical laser damage threshold is 2×10⁴W/cm² that makes its reflectivity obviously decrease. Its damage mechanism is oxidation.

Citation Download Citation

Lihong Gao, Zhuang Ma, Fuchi Wang, and Wenzhi Li "Reflectivity and laser irradiation of plasma sprayed Al coating", Proc. SPIE 9543, Third International Symposium on Laser Interaction with Matter, 95430N (4 May 2015); https://doi.org/10.1117/12.2181605

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