Plasma heated sintering furnace

Details Plasma heated sintering furnace Plasma heated sintering furnace

1985-04-01

1987-11-17

Paschall, M. H.

Electric heating

Metal heating

By arc

219121PQ, 373 18, 373 24, B23K 900

Patent

active

047075830

ABSTRACT:
A furnace for the sintering of refractory or ceramic materials using plasma heated gases. The furnace comprises a sintering chamber with strategic positioning of the plasma torch inlets and exhaust outlet, a furnace temperature controlling device during sintering so that the article being sintered does not decompose. The devices which can be used for controlling the temperature of the furnace during sintering include: (1) Tangential injection of a secondary colder gas stream into the hot primary plasma gas stream; (2) Utilization of a plasma torch or torches which can be temperature controlled to achieve stable and lower plasma gas temperatures; and (3) Introduction of a secondary cooler gas directly into the furnace sintering chamber.

REFERENCES:
patent: 3432296 (1969-03-01), McKinnon et al.
patent: 3935371 (1976-01-01), Camacho et al.
patent: 3970290 (1976-07-01), Santen et al.
patent: 4179299 (1979-12-01), Coppola et al.
patent: 4390773 (1983-06-01), Esser et al.
patent: 4462792 (1984-07-01), Roth et al.

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