New Catalytic Routes to Polysilazane Precursors to Silicon Nitride and Related Systems.

摘要

The project objectives are to develop new, low temperature, transition metal catalyzed routes to polysilazanes and related preceramic polymers with controlled rheological properties. Synthetic routes to silicon carbide precursor polymers are also being developed. In addition, we are delineating the effects of precursor structure on ceramic product composition (silicon nitride vs silicon carbide vs carbon) as a function of pyrolysis conditions. The utility of using polysilazane ceramic precursors for forming silicon nitride and silicon-carbide nitride fibers and coatings is being explored. (JES)