2 September 2015 T300HoneySiC: a new near-zero CTE molded C/SiC material
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Abstract
Using an Additive Manufacturing process, Trex Enterprises and teammates were successful in producing a 12-inch by 12-inch by 0.5-inch vented, lightweight, Honeycomb C/SiC ceramic matrix composite (CMC) panel which had a density relative to bulk silicon carbide of 11% (89% lightweighting). The so-called T300HoneySiC™ panel and facesheet stock material were fabricated into ASTM standard coupons and tested at Southern Research Institute to obtain basic materials properties data. The material properties data showed that we had made a near-zero coefficient of thermal expansion (CTE= -0.22 ppm/°C from -196°C to +24°C) CMC C/SiC material with good strength. This material will be ideal for space opto-mechanical structures and optical benches due to its near-zero CTE and light weight. The material is initially molded and then converted to a C/SiC ceramic matrix composite, thus the fabrication time can be less than 3 weeks from start to finish, resulting in low cost.
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William A. Goodman, William A. Goodman, Mehrdad N. Ghasemi Nejhad, Mehrdad N. Ghasemi Nejhad, Stan Wright, Stan Wright, Darren Welson, Darren Welson, } "T300HoneySiC: a new near-zero CTE molded C/SiC material", Proc. SPIE 9574, Material Technologies and Applications to Optics, Structures, Components, and Sub-Systems II, 95740E (2 September 2015); doi: 10.1117/12.2185638; https://doi.org/10.1117/12.2185638
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