Durable Interface Coatings for Ceramic Matrix Composites 

Advanced Ceramics Corporation (ACC) 

Lakewood, OH 
 

An interface coating that protects fiber- reinforced ceramic composites from moisture and oxidation at high tempera- tures

• Developed a family of high temperature and doped boron nitride coatings that offer orders of magnitude improvement  in interface durability for SiC/SiC composites
• Demonstrated that fibers in woven fabrics can be coated as uniformly as fibers in tows

• Firm supplies durable interface coatings on fiber tows from a new scaled-up facility
• Sales of $100 K to Fiber Reinforced Ceramic Matrix Composites (FRCMC) developers in 1996, with 1997 sales  estimated at $300K
• Three new jobs were created

 
 

• Major impact on the Enabling Propulsion Materials Program of High Speed Research showed that the new interface coatings are more than 1,000 times more durable than the state-of-the-art
• Applicable to national programs aimed at ceramic composites development for military and terrestrial applications
• Durability of interface coatings has been proven in glass, SiC, and Blackglas™ matrices

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