The invention is directed to a method of making a high strength-high modulus boron filament on a carbon substrate which is coated with pyrolytic graphite. Boron is deposited over the pyrolytic graphite. A preferred method of making such a filament citing specific pyrolytic graphite deposition temperatures...http://www.google.es/patents/US4142008?utm_source=gb-gplus-sharePatente US4142008 - Carbon filament coated with boron and method of making same
Carbon filament coated with boron and method of making same
