Continuous inorganic fibers and process for production thereof

Details Continuous inorganic fibers and process for production thereof Continuous inorganic fibers and process for production thereof

1982-05-26

1983-08-16

McCarthy, Helen M.

Compositions: ceramic

Ceramic compositions

Glass compositions, compositions containing glass other than...

501 32, 501 40, 501 73, 501 90, 501 87, 501 91, 501 95, C03C 312, C03C 1400, C04B 3552, C04B 3580

Patent

active

043992323

ABSTRACT:
Continuous inorganic fibers consisting substantially of Si, Ti and C and optionally of O, said fibers being composed of (1) an amorphous material consisting substantially of Si, Ti and C and optionally of O, or (2) an aggregate consisting substantially of ultrafine crystalline particles of .beta.-SiC, TiC, a solid solution of .beta.-SiC and TiC and TiC.sub.1-x wherein 0<x<1 and having a particle diameter of not more than 500 A, in which amorphous SiO.sub.2 and TiO.sub.2 sometimes exist in the neighborhood of these ultrafine crystalline particles, or (3) a mixture of said amorphous material (1) and said aggregate (2) of ultrafine crystalline particles. The aforesaid continuous inorganic fibers can be produced by the following steps: a first step of preparing a semi-inorganic block copolymer comprising polycarbosilane blocks having a main chain skeleton composed mainly of carbosilane units of the formula --Si-CH.sub.2 --, each silicon atom of said carbosilane units having bonded thereto a side-chain group selected from the class consisting of hydrogen, lower alkyl and phenyl, and titanoxane units of the formula --Ti--O--; a second step of preparing a spinning dope of said semi-inorganic block copolymer; a third step of subjecting the resulting fibers to a treatment of rendering them infusible under tension or under no tension; and a fourth step of firing the infusible fibers at a temperature of 800.degree. to 1800.degree. C. in vacuum or in an atmosphere of an inert gas or a reducing gas.

REFERENCES:
patent: 3529044 (1970-09-01), Santangelo
patent: 3853567 (1974-12-01), Verbeek
patent: 4100233 (1978-07-01), Yajima et al.
patent: 4105455 (1978-08-01), Koga et al.
patent: 4279654 (1981-07-01), Yajima et al.

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