Ceramic fibre and process therefor

Details Ceramic fibre and process therefor Ceramic fibre and process therefor

1994-01-21

1995-08-22

Bell, Mark L.

Plastic and nonmetallic article shaping or treating: processes

Reactive gas or vapor treatment of work

501 95, 501 96, 501102, 264164, 26417711, 423289, 423297, 423411, C04B 35655, C04B 3558

Patent

active

054437717

ABSTRACT:
A process is described for producing ceramic fibres composed of titanium boride, zirconium boride or hafnium boride. The boride fibres are obtained by reacting a boron oxide precursor fibre with a titanium halide, zirconium halide or hafnium halide gas in the presence of hydrogen. Ceramic titanium, zirconium or hafnium nitride fibres may also be produced by the process, by means of the additional presence of nitrogen gas in the gas phase. The process is conducted at temperature higher than 500.degree. C.

REFERENCES:
patent: 2980510 (1961-04-01), Berry
patent: 3657089 (1972-04-01), Takahashi et al.
patent: 4282155 (1981-08-01), Hoekje
patent: 5059563 (1991-10-01), Khazai et al.
patent: 5135895 (1992-08-01), Frechette et al.

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