Mr. Feng Xu Profile

Feng Xu

at Beijing Institute of Technology

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Proceedings Article | 12 May 2017 Paper

Ablation properties of inorganic filler modified benzoxazine composite coating irradiated by high-intensity continuous laser

Feng Xu, Zhuang Ma, Hezhang Li, Lihong Gao, Fuchi Wang

Proceedings Volume 10173, 1017302 (2017) https://doi.org/10.1117/12.2268248

KEYWORDS: Carbon, Laser irradiation, Scanning electron microscopy, Raman spectroscopy, Laser energy, Thermodynamics, Diffusion, Laser ablation, Composites, Coating

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Benzoxazine resin with good heat resistance, low combustion heat release and high char yield is a promising thermosetting resin. Meanwhile, research shows that the inorganic filler can effectively improve the thermodynamic property of the resin. It makes that the inorganic filler modified benzoxazine may have a potential application in laser ablation. The benzoxazine coating with and without inorganic filler ammonium polyphosphate, melamine and pentaerythritol (P-BOZ and BOZ) were prepared by brush and thermal curing method. The ablation properties of these coatings irradiated by high-intensity laser were investigated. The scanning electron microscope, Raman spectroscopy and thermal gravimetric analysis were used to characterize the micrographs, carbon layer structure and thermodynamic property of the sample. Results show that the composite coating has excellent thermal protective properties. The back temperature of 20 wt% P-BOZ coating under different parameter laser power (1000W/cm2, 5s; 1000W/cm2, 10s) are 40% lower than these of the BOZ coating and the 20 wt% P-BOZ has higher mass ablation rate. In the surface layer of the irradiated area, dense carbon layer is produced which reduces the absorb of the laser energy of the interior. In the interior of the sample, a large number of closed bell shaped holes are generated which are beneficial to obstruct the heat conduction.

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