Ablation resistance of potassium hexafluorotitanate whisker-modified epoxy silicone resin

doi:10.19936/j.cnki.2096-8000.20240528.005

Abstract

Abstract: The epoxy-silicone resin composites modified with potassium hexafluorotitanate whiskers (PHW) were prepared, and their oxygen-acetylene ablation performance was investigated, focusing on the impact of varying PHW content. The results indicate that addition of PHW can effectively enhance the anti-spalling capability and high-temperature ablation resistance of the epoxy organosilicon resin. When the PHW concentration is 20wt%, the composite material exhibits the lowest linear ablation rate and mass ablation rate, which are 0.136 mm/s and 1.143 g/s, respectively. These values are approximately 53.74% and 47.04% lower than those of the epoxy organosilicon resin alone. However, when the PHW content exceeds 20wt%, further increasing its amount is no longer significantly improving the ablation resistance of the composite material. Thermal gravimetric analysis (TGA) results reveal that the addition of PHW significantly decreases the weight loss rate of the epoxy-silicone resin. Specifically, when the PHW content is 20wt%, the weight loss rate of the composite material is approximately 38.57%, which is roughly 19.89% lower than that of the epoxy-silicone resin. Beyond a PHW content of 20wt%, further increases in its concentration within the composite material no longer yield a significant improvement in weight loss rate.

Key words: potassium hexatitanate whiskers, epoxy silicone resins, ablation, composites

CLC Number:

TB332

LI Xuan, ZHOU Dedong, HE Yu, ZHANG Lijing, SU Jing, LI Wei, XIAO Kui, MENG Weigang. Ablation resistance of potassium hexafluorotitanate whisker-modified epoxy silicone resin[J]. COMPOSITES SCIENCE AND ENGINEERING, 2024, 0(5): 30-35.

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