Preceramic polymers to hafnium carbide and hafnium nitride ceramic fibers and matrices
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United States of America Patent
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app pub date -
Jan 28, 2002
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Jun 3, 1999
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Abstract
Hafnium containing preceramic polymer is made through the reaction of hafnium halide compound with any of the following compounds: ethylene diamine, dimethyl ethylene diamine, piperazine, allylamine and or polyethylene-imine.
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