High-purity silicon nitride fibers

Details High-purity silicon nitride fibers High-purity silicon nitride fibers

1986-11-13

1989-04-04

Kendell, Lorraine T.

Stock material or miscellaneous articles

Coated or structually defined flake, particle, cell, strand,...

Rod, strand, filament or fiber

423344, 428359, 501 95, 501 97, 264 65, D02G 300

Patent

active

048186112

ABSTRACT:
Silicon nitride fibers having a carbon content of 5 weight percent or less have high heat insulating properties and favorable mechanical properties and are useful as heat resistant, highly insulating materials or reinforcing agents for composite materials, particularly in the aerospace industry. Such high purity silicon nitride fibers are produced by spinning a solution of perhydropolysilazanes, an inert solvent and a spinning agent into fibers, preferably continuous fibers, and firing the spun fibers at 800.degree. to 1300.degree. C. in an inert atmosphere to form silicon nitride fibers of high purity.

REFERENCES:
patent: 3244480 (1966-04-01), Johnson et al.
patent: 3640693 (1972-02-01), Galasso et al.
patent: 4036653 (1977-07-01), Jacobson
patent: 4101616 (1978-07-01), Buljan
patent: 4482669 (1984-11-01), Seyferth et al.

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