Boron-containing ceramics through the chemical conversian of bor

Details Boron-containing ceramics through the chemical conversian of bor Boron-containing ceramics through the chemical conversian of bor

1987-08-07

1989-05-23

Silbaugh, Jan H.

Plastic and nonmetallic article shaping or treating: processes

Carbonizing to form article

264 292, 264 296, 264 56, 264 82, 264 83, 2641761, 264183, 264204, 26421114, 26421119, 501 95, 501 96, 423291, D01F 908

Patent

active

048328952

ABSTRACT:
A process for producing boron-containing ceramics such as boron carbide and boron nitride comprises pyrolyzing a blend of a precarbonaceous polymer such as polyacrylonitrile and a boron-containing polymer such as that formed by the reaction of a borane with a Lewis base. Pyrolyzation in an inert atmosphere yields boron carbide while pyrolyzation in a reactive gas burns away the precarbonaceous polymer and yiels a ceramic comprising the reaction product of boron and the pyrolyzation gas. Boron nitride ceramics are formed by pyrolyzing the preceramic blend in ammonia.

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