DEVELOPMENT OF THERMAL SHIELD COATINGS FROM POLYMER COMPOSITES FOR ROCKET AND SPACE APPLICATIONS
DOI:
https://doi.org/10.18372/0370-2197.1(90).15249Keywords:
polymer composite materials, ceramic hollow microspheres, thermal shield coating, solid propellant rocket motor, thermal conductivity, heat resistanceAbstract
The technological foundations of molding materials for thermal shield coatings with a programmed structure, physical and mechanical characteristics have been developed. A char-forming type of internal heat shield coating material with a controlled density has been created, which increases the ablation resistance during the solid propellant rocket motor operation. It was found that the introduction of 30 wt.% сeramic hollow microspheres into a composite with carbon fibers and a phenol-formaldehyde matrix reduces the thermal conductivity by more than 50%. The heat resistance according to Martens is 130 °C. The paper carried out tests for thermal-oxidative resistance and fire tests.
As a result, the char residue of the composite with 30 wt.% сeramic hollow microspheres is ~ 75 ... 80% when it was heated to 1000 ± 50 °C/115 ... 240 s. The developed thermal shield coating material has been applied to metal and rubber substrates for thermal degradation protection.
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