Electric heating – Metal heating – By arc
Patent
1985-01-29
1987-08-04
Paschall, M. H.
Electric heating
Metal heating
By arc
219121LA, 219121LM, 219121LD, 228107, 228115, 427 531, B23K 2600
Patent
active
046847812
ABSTRACT:
A coated substrate manufactured by applying a layer of a material to the substrate and generating thermal and pressure waves in the layer by exposing the layer to high intensity, short duration laser radiation, and the process of manufacturing such a coated substrate. The laser radiation is applied in an intensity range that creates an instantaneous surface vaporization of the layer material that in turn drives a pressure wave into the layer. The pressure wave interacts with the layer-substrate interface to create bonding between them of varying strengths and qualities depending on the intensity and duration of the initial laser pulse. A thermal wave is created in some regimes of operation, or results from compressional heating of the layer by the pressure wave, and is of sufficient energy to contribute to the bonding at the interface. The coating and the process for its creation has application in diverse areas where surface properties of a particular color, hardness, corrosion resistance, abrasion resistance, electrical conductivity, among others are desired.
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Theory and Application of Pulsed Laser Welding by Anderson et al., Welding Journal, pp. 1018-1026, Dec. 1965.
Frish Michael B.
Nebolsine Peter E.
Pirri Anthony N.
Paschall M. H.
Physical Sciences Inc.
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