Aircraft brake pressure plates made of carbon-carbon composites are subjected to very high heat over 1000 degrees F causing oxidation, thus limiting the life span. Oxidation protective coating system needs to be developed that can substantially improve the performance characteristics and life span.  In Phase I of this SBIR project, UES demonstrated the feasibility of depositing silicon and boron based multilayer coating system using physical vapor deposition (PVD) methods. Formation of SiC by subsequent heat treatment together with a boron containing coating clearly showed excellent oxidation resistant properties of the coatings. In Phase II (Contract FA8201-05-C-0071), UES will optimize the coating process for fast deposition and formation of SiC and boron containing glasses for improved oxidation and environmental protection. Optimized, well-adherent coatings will be subjected to lab-scale simulated exposure tests up to 2000 degrees F. Scale up of the coating process for actual brakes will also be pursued in Phase II. UES is working with Goodrich, a major manufacturer of aircraft brakes, to commercialize this technology.

Additional details of this program can be obtained from Dr. Rabi Bhattacharya (937-426-6900, ext. 114; E-Mail: RBhattacharya@UES.com).