Moldable and Curable Silicon Carbide Prepreg For Hypersonic Thermal Protection Systems

During the past 3-years, Goodman Technologies (GT) in partnership withnbsp;the University of Hawaii at Manoa, (UHM, a Minority Serving Institution) have demonstratednbsp;Silicon Carbide (SiC) based nanopastes which are 3D printable, and moldable via our proprietary Z-process (technically Polymer Matrix Composites, PMCs, prior to firing). Nanopaste, nanoresin and nanotape technologies have been used to make Continuous Fiber Ceramic Nano-Composites (CFCNCs), a very special type of ceramic matrix composites (CMC) with engineered properties and multifunctionality.nbsp;We are proposing a purposefully engineered silicon carbide-based CFCNC innovation to NASA for this topic area which overcomes the issues of delamination and will have tremendous payoff for spacecraft TPS and hypersonics in general. Some of the enabling printable nanopaste technology originated with GTrsquo;s very first Phase I NASA SBIR Contract #NNX17CM29P, and we have shown the ability to join large parts via an additive manufacturing process to fabricate seemless, monolithic structures. We also have the ability to co-cure CMC with PMC and carbon fiber reinforced epoxy composites.nbsp; We have been able tonbsp; join these materials to both aluminum and steel.nbsp; We have also produced CMC fasterners with up to 100 threads per inch for precision mechanical joining.nbsp; During the Phase I STTR we propose to manufacture sample CFCNC coupons, perform ASTM testing to obtain mechanical properties (strength, strain, toughness), scanning electron microscopy (SEM) to look at the nano/micro-structure, andnbsp;establish initial high-temperature performance via two different heating methods, one proprietary.nbsp; We will evaluate the efficacy of our quot;Cure-On-The-Flyquot; technologies for co-curing, and explore both co-curing and post-curing for adhesive bonding the CFCNC to underlying substrates. We will work with NASA to generate a Phase II plan that results in the design, manufacture, and high-temperature, high heat flux testing of a meter-class CFCNC TPS.