Coated filaments

Details Coated filaments Coated filaments

1993-10-19

1996-11-05

Ryan, Patrick

Coating processes

Coating by vapor, gas, or smoke

Carbon or carbide coating

4272481, 427255, 4272557, 4272552, C23C 1600

Patent

active

055715613

ABSTRACT:
A ceramic filament comprising a tungsten core and an outer layer of silicon carbide, the tungsten core and the outer layer being separated by an intermediate layer of titanium carbide. Also claimed is a process for the deposition of a titanium carbide coating on a tungsten filament which comprises heating the filament and passing the heated filament through a deposition chamber containing gases which on contact with the hot filament deposit the coating, the gases comprising a hydrocarbon and a titanium halogenated compound, said titanium halogenated compound contacting the tungsten filament before the hydrocarbon.

REFERENCES:
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patent: 3642522 (1972-02-01), Gass et al.
patent: 3667100 (1972-06-01), Marchal et al.
patent: 3811920 (1974-05-01), Galasso et al.
patent: 4055700 (1977-10-01), Ronnquist et al.
patent: 4068037 (1978-10-01), Debolt et al.
patent: 4127659 (1978-11-01), DeBolt et al.
patent: 5041305 (1991-08-01), Gruber

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