Ablation behavior of inorganic particle-filled polybenzoxazine composite coating irradiated by high-intensity continuous laser |
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| Affiliation: | 1. School of Material Science and Engineering, Beijing Institute of Technology, Beijing, 100081, China;2. National Key Laboratory of Science and Technology on Material Under Shock and Impact, Beijing, 100081, China;3. Northwest Institute of Nuclear Technology, Xi''an, 710024, China;4. State Key Laboratory of Laser Interaction with Matter, Xi''an, 710024, China;1. Fraunhofer-Institute for Manufacturing Technology and Advanced Materials (IFAM) Adhesive Bonding Technology and Surfaces, Wiener Straße 12, D-28359, Bremen, Germany;2. University of Bremen, Faculty 04 – Production Engineering, Badgasteiner Straße 1, D-28359, Bremen, Germany;1. School of Materials Science and Engineering, Beijing Institute of Technology, Beijing 100081, China;2. National Key Laboratory of Science and Technology on Materials under Shock and Impact, China;1. College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu, 610065, China;2. Civil Aviation Safety Engineering Institute, Civil Aviation Flight University of China, Guanghan, 618307, China;3. Aerospace Research Institute of Materials and Processing Technology, Beijing, 10074, China;1. Key Laboratory for Mechanics in Fluid-Solid Coupling Systems, Institute of Mechanics, Chinese Academy of Sciences, Beijing 100190, China;2. School of Engineering Sciences, University of Chinese Academy of Sciences, Beijing 100049, China;3. Thermostructural Composite Materials Laboratory, Northwestern Polytechnical University, Xi''an, Shaanxi 710072, China;4. Department of Environment and Chemical Engineering, Yanshan University, Qinhuangdao, Hebei 066004, China |
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| Abstract: | Further utilization of aircraft structural materials is threatened by the fact that high-intensity continuous lasers are widely used in the field of military defense. To protect the aircraft structure from laser damage, ammonium polyphosphate filled polybenzoxazine composite coatings were prepared on the substrate. The anti-laser ablation characteristics of the coatings were investigated. Results showed that the addition of the inorganic filler improved the anti-laser ablation performance of polybenzoxazine. The back-surface temperature of substrates covered with the composite coatings was more 50% lower than that in the case of a pure polybenzoxazine coating after laser ablation. Further, the residue of the composite coating could be vertically divided into three distinct regions, with the dense surface char layer and the porous pyrolysis layer acting as shielding layers for the laser beam and preventing any heat-related transformations from occurring. The addition of the inorganic particles improved the surface reflectivity of the coatings resulting in much more laser energy dissipation. The decreased pyrolysis rate ensured that the pneumatic cooling effect of pyrolysis gas was more lasting and stable, owing to which the composite coatings could act as effective thermal protection layer for longer. These results confirmed that the inorganic filler modified polybenzoxazine coating exhibits excellent anti-laser properties and are suitable for protecting structural materials from laser-related damage. |
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| Keywords: | Polybenzoxazine composite coating Laser ablation behavior Inorganic filler Heat dissipation |
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