Tytuł pozycji:
Effect of the amount and location of phase change materials in a fibre reinforced composite matrix on ablative properties
For this work, fibre-reinforced composites were prepared using 14 layers of aramid fabric and 6 layers of carbon fabric. The matrix was composed of epoxy resin Epidian 52, cured with TFF hardener. The composite cross-linked at ambient temperature. Additionally, a phase change material (PCM) in the form of BASF's Micronal DS5038X powder was added to the resin. Three samples were prepared for each measurement run, varying in the amount of powder additive used in the resin. The composites prepared in this way were subjected to ablation tests lasting approximately 3 minutes, during which the samples were exposed to a hot gas mixture at around 1100°C. The primary parameter measured during the experimental tests was the temperature of the back surface of the composite, recorded using thermocouples and a thermal imaging camera. The temperature of the ablated surface was also measured using a pyrometer, while the internal temperature of the material was recorded using thermocouples. Following the experimental tests, the ablative weight loss and ablation rate were analyzed. Additionally, an organoleptic evaluation of the individual layers of the composite structure was performed. The study revealed that the incorporation of phase change material altered the ablative properties of the composite. The average temperature on the back surface of the composite without the addition of microspheres was approximately 165°C after 180 seconds of heating. With the addition of PCM, significantly lower temperatures were recorded, ranging from 86°C to 106°C. Conversely, the addition of powder in the epoxy resin resulted in an increase in ablative weight loss by 1-4%, depending on the amount of the additive. This may be due to the formation of a layer with a higher thermal conductivity barrier in the composite with PCM.
Opracowanie rekordu ze środków MNiSW, umowa nr POPUL/SP/0154/2024/02 w ramach programu "Społeczna odpowiedzialność nauki II" - moduł: Popularyzacja nauki (2025).
