Industrial electric heating furnaces – Electron beam furnace device
Patent
1985-12-05
1987-06-30
Envall, Jr., Roy N.
Industrial electric heating furnaces
Electron beam furnace device
373 15, H01J 37305
Patent
active
046776427
ABSTRACT:
The electron bombardment furnace (B) consists of two confinement grid sections (26,28) which may be moved and separated from each other. Inside the bombardment furnace, a tungsten element (14) is enclosed. The material specimen (18) is located within the tungsten element and grounded by means of grounded support wires (20,22) connected to the respective sections of the furnace. The material specimen (18) is supported on the ground wires and heated by electron bombardment until melt occurs. The furnace sections are separated in opposite directions causing the ground wires to pull from the surfaces of the specimen, leaving the specimen freely suspended in the process chamber without the action of external forces. The specimen remains in its melt condition in the processing chamber where it can be undercooled without external forces acting on the specimen, which would cause dynamic nucleation.
REFERENCES:
patent: 2686864 (1954-08-01), Wroughton et al.
Lacy Lewis L.
Robinson Michael B.
Beumer Joseph H.
Envall Jr. Roy N.
Manning John R.
The United States of America as represented by the Administrator
Wofford, Jr. Leon D.
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