Low-Cost Ceramic Composites

LaPO4 coated fibers embedded in dense aluminum-silicate matrix

SRI's new matrix-formation technology is being used to make continuous fiber-reinforced ceramic composites. The matrix consists of a low-cost preceramic polymer loaded with ceramic powders or metal fillers that expand upon oxidation to increase the matrix density. Applications include candle filters (hot gas filters), heat exchangers, metal handling, and high-temperature structural and aerospace uses. SRI's research on control of the polymer and curing chemistry provided the foundation for developing the low-cost, flexible fabrication. Based on our success in the oxide composite arena, SRI is also beginning to expand into nonoxide matrices.

Advantage
Ceramic composites are an alternative for many applications where the toughness or fracture resistance of monolithic ceramics is inadequate. SRI's approach uses fewer steps and less costly materials, plus the flexibility of the system allows for many matrix compositions to be used. SRI's matrix formulation allows for twice the fiber loading and strengths of the competing composites.

Opportunity
SRI's approach to creating fiber reinforced oxide composites is available for license for specific compositions and applications.