Process and apparatus for treating a material by a thermoionic e

Details Process and apparatus for treating a material by a thermoionic e Process and apparatus for treating a material by a thermoionic e

1987-02-12

1987-12-22

Newsome, John H.

Coating processes

Electrical product produced

Welding electrode

118620, B05D 306

Patent

active

047146281

ABSTRACT:
Process and apparatus for treating a material by thermoionic effect with a view to modifying its physicochemical properties.
The apparatus comprises a substrate having first and second opposite faces, the first face being covered with a dopant film and being positionable facing the material, while maintaining a space between the film and the material; a source producing a collimated, pulsed laser beam having a given wavelength, directed onto the second face of the substrate which is transparent to said wavelength, said laser beam being able to interact with the dopant film for forming dopant ions by explosive vaporization of the dopant; and electrical means for producing simultaneously with the laser pulse an electric field in said space for accelerating the dopant ions with a view to their thermoionic implantation in the material.
Application to the treatment of metals and alloys.

REFERENCES:
patent: 3551213 (1970-12-01), Boyle
patent: 4108751 (1978-08-01), King
patent: 4474827 (1984-10-01), Ferralli
patent: 4670064 (1987-06-01), Schachameyer et al.
Roshon et al., "IBM TDB", vol. 13, No. 6, 11-1974, pp. 1807-1808.
Coullahan et al., "IBM TDB", vol. 22, No. 6, 11-1979, pp. 2279-2281.
von Gutfeld, "IBM TDB", vol. 7, No. 3, 8-1964, p. 224.
Patent Abstract of Japan, vol. 7, No. 122, 26.5.1983.

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