Title: Evaluation of Integration Strategies and Thermal Degradation Prevention Effectivness of Composite Thermal Barrier Systems

Authors: Marcos Pantoja, Alan Rhodes, Evan Lloyd, Jeremy O’Hara

DOI: 10.33599/nasampe/c.24.0278

Abstract: " The use of thermal barriers is an effective strategy of extending the lifetime of composite structures in high temperature operating environments. These thermal barrier systems are often integrated onto pre-fabricated components through offline secondary processes, with typical embodiments consisting of sprayable coatings, bonded tiles, fused depositions, etc. However, these integration strategies drive complexity and cost due to the need for additional manufacturing steps occurring after the prime component fabrication process. This work establishes a technically viable and cost-effective approach to assemble a carbon fiber reinforced bismaleimide (BMI) composite structure with an integrated fiberglass thermal insulation system. The integration method consists of co-bonding the green structural BMI laminate directly onto the thermal barrier, resulting in an insulated structure upon final cure. BMI resin intrusion into the thermal barrier was mitigated through resin conversion/advancement strategies employed at the bonding interface prior to co-bonding. Additionally, the thermal protection properties of the barrier system were assessed via thermal oxidation stability (TOS) testing. The key metrics evaluated were laminate quality and oxidation weight loss of BMI laminates with and without thermal protection. In all, the thermal barrier provided considerable oxidation protection of the BMI laminate as evidenced by less severe microcracking along the laminate surface. "

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Conference: CAMX 2024 | San Diego CA

Publication Date: 2024/9/9

SKU: TP24-0000000278

Pages: 13

Price: $26.00