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Proceedings Paper

Reflectivity and laser irradiation of plasma sprayed Al coating
Author(s): Lihong Gao; Zhuang Ma; Fuchi Wang; Wenzhi Li
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Paper 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.

Paper Details

Date Published: 4 May 2015
PDF: 5 pages
Proc. SPIE 9543, Third International Symposium on Laser Interaction with Matter, 95430N (4 May 2015); doi: 10.1117/12.2181605
Show Author Affiliations
Lihong Gao, Beijing Institute of Technology (China)
Zhuang Ma, Beijing Institute of Technology (China)
Fuchi Wang, Beijing Institute of Technology (China)
Wenzhi Li, Beijing Institute of Technology (China)

Published in SPIE Proceedings Vol. 9543:
Third International Symposium on Laser Interaction with Matter
Yury M. Andreev; Zunqi Lin III; Xiaowu Ni; Xisheng Ye, Editor(s)

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