Electric heating – Metal heating – By arc
Patent
1980-10-09
1982-06-01
Albritton, C. L.
Electric heating
Metal heating
By arc
219121FS, 219121LN, 219121LG, 219121LL, B23K 2700
Patent
active
043329993
ABSTRACT:
A method for machining a workpiece with a beam of radiant energy in the presence of a chemically-reactive gas characterized in that (a) the beam heats the area of incidence of the workpiece to a reaction temperature that is below the melting point of the workpiece material and (b) the chemical reaction is exothermic and produces a reaction product having a boiling point that is below the reaction temperature of the workpiece material. The gas is preferably a halogen or nonmetallic halide which reacts with the workpiece material to produce a metal halide.
REFERENCES:
patent: 3569660 (1971-03-01), Houldcroft
patent: 3597578 (1971-08-01), Sullivan
patent: 3601576 (1971-08-01), Schlatli et al.
patent: 3965328 (1976-06-01), Locke
patent: 4084988 (1978-04-01), Engel et al.
patent: 4167662 (1979-09-01), Steen
M. V. Sullivan et al., "Direct Photoetching of Evaporated Germanium and Its Use in Mask Fabrication", Electrochemical Technology, 6 430-434 (1968).
I. M. Beterov et al., "Effect of the Laser Radiation Intensity on the Kinetics of the Heterogeneous Photochemical Reaction between Single-Crystal Germanium and Bromine Gas ", Sov. J. Quantum Electron, 8 1310-1312 (1978).
Albritton C. L.
Greenspan L.
Irlbeck D. H.
RCA Corporation
Whitacre E. M.
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