INFLUENCE OF THE USE OF ADDITIVE PHASE CHANGE MATERIALS IN THE MATRIX OF FIBRE COMPOSITES ON THE ABLATIVE PROPERTIES
Topic(s) : Material science
Co-authors :
Robert SZCZEPANIAK (POLAND), Paweł PRZYBYŁEK , Katarzyna KRZYSZTOFIK , Joanna MASIEWICZ , Mateusz MUCHA , Przemysław SAPIŃSKI (POLAND), Ewelina KOSICKAAbstract :
The need to provide thermal protection for sensitive aeronautical technology components exposed to high heat flux temperatures necessitates the emergence of new materials with high thermal protection properties. The research focused on a fiber composite consisting of 14 layers of aramid fabric and 6 layers of carbon fabric. Epidian 52 epoxy resin hardened at room temperature with TFF hardener was used as a matrix. The resin was modified with phase change material (PCM) in the form of Micronal DS5038X powder. Four series of 3 pieces each were prepared, differing in the amount of PCM in the composite matrix. The samples were exposed to a mixture of hot gases at a temperature of approximately 1100°C for 3 minutes. During the tests, the temperature of the material's ablation surface, the temperature of the back surface, as well as the temperature in 3 places of the composite up to half of its thickness from the back surface were read. A thermal imaging camera was used to verify the temperature distribution on the rear surface. After the tests, the ablation mass loss and mass ablation rate were also analyzed.
Analysing the experimental results, it was found that the use of phase change materials in the composite matrix would significantly affect the ablative properties of the material. The average value of the back wall surface temperature of the fibre composite without the addition of PCM after 180 seconds was about 168°C. The average back wall surface temperature of all composites with the addition of phase change material PCM was in the range of 96 ± 10°C after 180 seconds. The fibre composites with PCM addition reached a rear wall surface temperature of approximately 1000°C reduced from the ablative surface temperature. The ablative weight loss of the fibre composites without PCM addition was 31.7%. The highest relative ablative weight loss was achieved by polymer composites with 16% PCM addition up to half the thickness of 35.8 %, while the lowest with a value of 32.9% was achieved by composites with 16% PCM phase change material added throughout the thickness. The addition of PCM to the composite resulted in an increase in ablative weight loss of approximately 1- 4 % (relative to the original weight of the material tested).
Analysing the experimental results, it was found that the use of phase change materials in the composite matrix would significantly affect the ablative properties of the material. The average value of the back wall surface temperature of the fibre composite without the addition of PCM after 180 seconds was about 168°C. The average back wall surface temperature of all composites with the addition of phase change material PCM was in the range of 96 ± 10°C after 180 seconds. The fibre composites with PCM addition reached a rear wall surface temperature of approximately 1000°C reduced from the ablative surface temperature. The ablative weight loss of the fibre composites without PCM addition was 31.7%. The highest relative ablative weight loss was achieved by polymer composites with 16% PCM addition up to half the thickness of 35.8 %, while the lowest with a value of 32.9% was achieved by composites with 16% PCM phase change material added throughout the thickness. The addition of PCM to the composite resulted in an increase in ablative weight loss of approximately 1- 4 % (relative to the original weight of the material tested).