Laser ablation behavior of nano-copper particle-filled phenolic matrix nanocomposite coatings
Laser ablation behavior of nano-copper particle-filled phenolic matrix nanocomposite coatings
复制标题
纳米铜颗粒填充酚醛基纳米复合涂层的激光烧蚀行为
DOI：
10.1016/j.compositesb.2018.07.048
复制
发表时间：
2018-12-15
影响因子：
13.1
通讯作者：
Ishida, Hatsuo
中科院分区：
文献类型：
--
作者：
Ma, Chen;Ma, Zhuang;Ishida, Hatsuo
激光，特别是高能连续波 (CW) 激光，由于其高能量会引起热损伤，因此对材料的威胁越来越大。在这种情况下，激光防护越来越受到人们的关注。设计并成功制备了由纳米铜填料与酚醛树脂基体组成的纳米复合涂层，以满足抗激光烧蚀的要求。通过背面基材的温度来评估纳米复合涂层的抗激光烧蚀能力。结果表明，纳米铜颗粒的蒸腾冷却作用确实提高了涂层的抗激光烧蚀性能。酚醛树脂热解产生的具有多孔结构的残留炭对于防止激光照射涂层内部起着关键的屏障作用。在连续激光照射过程中，无定形碳逐渐转变为石墨结构。后者在高温下具有更好的稳定性，提高抗激光烧蚀能力。微观形貌和元素含量分析表明，纳米铜颗粒的蒸发逐层发生，直至酚醛树脂完全热解位于涂层的垂直方向。所有分析表明，这种纳米复合涂层作为抗激光损伤的防护罩具有优异的性能。
Laser is becoming increasing threat to materials due to its high energy that can induce thermal damage, especially high energy continuous-wave (CW) laser. In this case, laser protection has attracted more and more concerns. Nanocomposite coatings that consist of nano-copper filler with phenolic resin matrix have been designed and successfully prepared to meet the requirement of anti-laser ablation. The anti-laser ablation ability of the nanocomposite coatings is evaluated through the temperature of the back-surface substrate. Results show that the transpiration cooling effect of nano-copper particles do improve the anti-laser ablation property of the coating. The residual char with porous structure which is the pyrolysis result of phenolic resin plays a key role as a barrier to prevent laser from irradiating inside of the coating. The amorphous carbon gradually transforms to graphitic structure during CW laser irradiation. The latter has better stability at high temperature, improving anti-laser ablation. The micro-morphologies and element content analysis indicate that the evaporation of nano copper particles occurs layer by layer until the total pyrolysis of phenolic resin located in the vertical direction of the coating. All the analyses show that this nanocomposite coating has excellent performance as a protective shield to anti-laser damage.