Reflectivity and laser irradiation of plasma sprayed Al coating

被引：3

作者：

Gao, Lihong ^{[1
]}

Ma, Zhuang ^{[1
]}

Wang, Fuchi ^{[1
]}

Li, Wenzhi ^{[1
]}

机构：

[1] Beijing Inst Technol, Sch Mat Sci & Engn, Beijing 100081, Peoples R China

来源：

THIRD INTERNATIONAL SYMPOSIUM ON LASER INTERACTION WITH MATTER | 2015年 / 9543卷

关键词：

Reflectivity; Laser irradiation; Plasma spray; Al coating;

D O I：

10.1117/12.2181605

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

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 10.6 mu m wavelength) of plasma sprayed Al coating, which is comparable with bulk material, could be obtained. Its optical laser damage threshold is 2x10(4)W/cm(2) that makes its reflectiviy obviously decrease. Its damage mechanism is oxidation.

引用

页数：5

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