Reflectivity and laser irradiation of plasma sprayed Al coating

Lihong Gao; Zhuang Ma; Fuchi Wang; Wenzhi Li

doi:10.1117/12.2181605

Reflectivity and laser irradiation of plasma sprayed Al coating

Lihong Gao, Zhuang Ma, Fuchi Wang, Wenzhi Li

School of Material Science and Engineering

Beijing Institute of Technology

Research output: Contribution to journal › Conference article › peer-review

7 Citations (Scopus)

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.

Original language	English
Article number	95430N
Journal	Proceedings of SPIE - The International Society for Optical Engineering
Volume	9543
Issue number	January
DOIs	https://doi.org/10.1117/12.2181605
Publication status	Published - 2015
Event	3rd International Symposium on Laser Interaction with Matter, LIMIS 2014 - Nanjing, China Duration: 2 Nov 2014 → 5 Nov 2014

Keywords

Al coating
Laser irradiation
Plasma spray
Reflectivity

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10.1117/12.2181605

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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.",

keywords = "Al coating, Laser irradiation, Plasma spray, Reflectivity",

author = "Lihong Gao and Zhuang Ma and Fuchi Wang and Wenzhi Li",

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AU - Gao, Lihong

AU - Ma, Zhuang

AU - Wang, Fuchi

AU - Li, Wenzhi

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N2 - 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.

AB - 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.

KW - Al coating

KW - Laser irradiation

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KW - Reflectivity

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Y2 - 2 November 2014 through 5 November 2014

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Reflectivity and laser irradiation of plasma sprayed Al coating

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