Multiple electron beam vacuum vapor deposition apparatus

Details Multiple electron beam vacuum vapor deposition apparatus Multiple electron beam vacuum vapor deposition apparatus

1977-07-06

1979-05-08

Reynolds, Wm. Cater

Coating apparatus

With cutting, punching or tearing of work

Web or sheet work

118624, C23C 1312

Patent

active

041530055

ABSTRACT:
A vacuum vapor deposition apparatus having a plurality of electron beam sources spaced about the periphery of the molten alloy pool is provided. The electron beam sources have associated therewith focusing and deflection devices for directing each electron beam onto the pool surface opposite its source in the form of an inwardly curved impingement band. These create an approximate toroidal shaped heating pattern to the pool, this pattern providing uniform temperature and minimizing severe thermal gradients therein. As a result, variations in the chemistry of the vapor emanating from the pool are substantially reduced, thereby providing improved control of the as-deposited coating composition. The apparatus is especially useful in vaporizing alloys of complex chemistry, such as coating alloys in the MCrAlY family.

REFERENCES:
patent: 3189953 (1965-06-01), Smith, Jr.
patent: 3268648 (1966-08-01), Dietrich
patent: 3364296 (1968-01-01), Smith, Jr.
patent: 3420977 (1969-01-01), Hanks et al.
patent: 3450824 (1969-06-01), Hanks et al.
patent: 3526206 (1970-09-01), Jones
patent: 3556048 (1971-01-01), Paine
patent: 3777704 (1973-12-01), Van Poucke
patent: 3889019 (1975-06-01), Blecherman et al.
patent: 4016389 (1977-04-01), White

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