Innovative 2D Ceramic Matrix Composites for Improved Interlaminar Strengths Navy SBIR FY2005.2 Sol No.: Navy SBIR FY2005.2 Topic No.: N05-098 Topic Title: Innovative 2D Ceramic Matrix Composites for Improved Interlaminar Strengths Proposal No.: N052-098-0588 Firm: Materials Research & Design 300 E. Swedesford Rd Wayne, Pennsylvania 19087-1858 Contact: Kent Buesking Phone: (610) 964-6130 Web Site: www.m-r-d.com Abstract: The performance of the JSF can be improved through the use of CMCs because they offer lower weight, improved high temperature strengths, and better performance than existing metal components. Recent tests of CMC components have identified COI's S200 CMC as an attractive material for gas turbine applications. Flight tests of F-16 nozzle components have demonstrated better performance than metal parts. They have also shown that the life of the CMC is limited by the interlaminar strengths. The proposed effort seeks to improve these strengths by assessing three innovative techniques that include 1) an alternate matrix material, 2) stretch broken yarns, and 3) needled preforms. Each of these techniques shows promise based on examination of existing high temperature composite data, which suggest potential strength improvements ranging from two to five times nominal strengths. The proposed Phase I program will be performed by a team of MR&D, Intermat, TEAM, COI Ceramics, and SoRI. MR&D will design the materials, and manage the project. Intermat will stretch break the Nicalon yarns. TEAM will weave the stretch broken fabric and fabricate the needled preform. COI Ceramics will densify three CMCs made with a) alternate matrix materials, b) stretch broken yarns, and c) needled preforms. SoRI will measure the interlaminar shear and inplane tensile properties of each material. Benefits: If the Phase I effort is successful, the program will have 1) demonstrated the feasibility of improved interlaminar strengths for the S200 CMC system, and 2) added to the design database to support the development of JSF components. The Phase II effort will build upon these results by expanding the property database, modifying component designs, and fabricating and testing critical subcomponents. Return