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Continuous Solvothermal Synthesis and Surface Treatment for Improved and Scalable Processing of Ultra High Temperature Ceramic (UHTC) Nanopowders

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SRI International Menlo Park United States

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The project attempted to develop a wet, environmentally-controlled, continuous synthesisprocessing route for high-puritynon-agglomerated boride, carbide, and nitride nanoparticles of preferred transition metal elements such as Zr, Hf, and Ta. The proposed generic approach consisted of solvothermal reactions in pressurized vessels. The Approach was abandoned after 2 years due to the presence of large carbon content, derived from the organic solvents. The revised objective was to assess the potential of 2 new polymeric precursors to boron carbonitride and boron nitride as weak interface coatings forSiCSiC composites. This approach was found to be promising and deserves further evaluation in a systematic mode.

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Technical Report,01 Jul 2013,31 Mar 2017



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Approved For Public Release;

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