Moisture Resistant BN Interface Coatings for 3D Ceramic Matrix Composites Navy SBIR FY2005.1 Sol No.: Navy SBIR FY2005.1 Topic No.: N05-010 Topic Title: Moisture Resistant BN Interface Coatings for 3D Ceramic Matrix Composites Proposal No.: N051-010-0730 Firm: Technology Assessment & Transfer, Inc. 133 Defense Highway, Suite 212 Annapolis, Maryland 21401 Contact: Steven Seghi Phone: (410) 987-3435 Web Site: www.techassess.com Abstract: Technology Assessment and Transfer will develop a novel process for applying a well aligned, uniform, moisture resistant BN fiber interface (debond) coating for three dimensional (3-D) SiC fiber reinforced ceramic matrix composites (CMCs). SiCf CMCs are bill of material (BOM) for selected sections of the turbine engine and exhaust systems for the Joint Strike Fighter (JSF) with weight reduction as the ultimate goal. The demonstration of a hydrolytically stable BN fiber-matrix interface coating based on a novel borazine preceramic polymer infiltration approach will be completed. Benefits: The key commercial benefit of the proposed research is the potential weight savings for non-military aircraft. As oil prices soar and domestic airline companies struggle to maintain a respectable profit margin, lower operating cost will give US carriers a global advantage. Thus, Technology Assessment & Transfer will pursue commercialization not only through traditional end users such as Pratt & Whitney and General Electric Aircraft Engines, but through domestic manufacturers such as Boeing and Rolls Royce. Return