T300HoneySiC: a new near-zero CTE molded C/SiC material

William A. Goodman; Mehrdad N. Ghasemi Nejhad; Stan Wright; Darren Welson

doi:10.1117/12.2185638

2 September 2015 T300HoneySiC: a new near-zero CTE molded C/SiC material

William A. Goodman, Mehrdad N. Ghasemi Nejhad, Stan Wright, Darren Welson

Proceedings Volume 9574, Material Technologies and Applications to Optics, Structures, Components, and Sub-Systems II; 95740E (2015) https://doi.org/10.1117/12.2185638
Event: SPIE Optical Engineering + Applications, 2015, San Diego, California, United States

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.

Citation Download Citation

William A. Goodman, Mehrdad N. Ghasemi Nejhad, Stan Wright, and 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); https://doi.org/10.1117/12.2185638

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