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首页> 外文期刊>Journal of Materials Science >Toward improving the reflectivity of ablative heat-insulating coating under high-energy laser irradiation
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Toward improving the reflectivity of ablative heat-insulating coating under high-energy laser irradiation

机译：在高能激光照射下提高烧蚀隔热涂层的反射率

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摘要

Anti-laser damage has become a major concern because of the rapid evolution of high power continuous-wave laser technology. While phenolic matrix composite coatings exhibit good anti-laser property, they show low reflectivity during laser irradiation, resulting in high energy absorption. A novel composite coating that consists of Al(OH)(3)and nano-copper fillers with phenolic resin matrix has been designed to solve the low reflectivity problem. X-ray diffraction reveals that Al(2)O(3)particles generate on the surface of the coating during laser irradiation because of the dehydration reaction of Al(OH)(3). The endothermic effect of this dehydration reaction and the transpiration of nano-copper particles have a significant cooling effect on the coating. The reflectivity of coating is monitored in real time during laser irradiation. It is confirmed that the reflectivity gradually increases with the accumulation of Al(2)O(3)particles. According to the temperature of back-surface substrates, the improved reflectivity does lead to a better anti-laser property of the coating. The laser ablation behavior of the composite coating was studied in detail through different laser parameters. The results show that both laser power density and irradiation time have effect on the micro-morphologies and reflectivity of the coating.
机译：由于高功率连续波激光技术的快速演变，反激激损坏已成为一个主要问题。虽然酚类基质复合涂层具有良好的抗激光特性，但它们在激光照射期间显示出低的反射率，导致能量吸收高。由Al（OH）（3）和具有酚醛树脂基质的纳米铜填料组成的新型复合涂层已经设计用于解决低反射率问题。 X射线衍射显示，由于Al（OH）（3）的脱水反应，Al（2）O（3）颗粒在激光照射期间在涂层的表面上产生。该脱水反应的吸热效果和纳米铜颗粒的蒸腾对涂层具有显着的冷却效果。在激光照射期间实时监测涂层的反射率。确认，反射率随着Al（2）O（3）颗粒的积累而逐渐增加。根据背面衬底的温度，改善的反射率确实导致涂层的更好的抗激光特性。通过不同的激光参数详细研究复合涂层的激光烧蚀行为。结果表明，激光功率密度和辐射时间都对涂层的微观形态和反射率有影响。

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  • 来源
    《Journal of Materials Science》 |2020年第33期|共10页
  • 作者

    Ma Chen; Ma Zhuang; Gao Lihong; Wu Taotao; Wang Fuchi; Ishida Hatsuo;

  • 作者单位

    Huaqiao Univ Coll Mat Sci &

    Engn Xiamen 361021 Peoples R China;

    Beijing Inst Technol Sch Mat Sci &

    Engn Beijing 100081 Peoples R China;

    Beijing Inst Technol Sch Mat Sci &

    Engn Beijing 100081 Peoples R China;

    Northwest Inst Nucl Technol Xian 710024 Peoples R China;

    Beijing Inst Technol Sch Mat Sci &

    Engn Beijing 100081 Peoples R China;

    Case Western Reserve Univ Dept Macromol Sci &

    Engn Cleveland OH 44106 USA;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 工程材料学;
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