Advances in the electrospark deposition coating process

Journal Article · Sat Nov 01 00:00:00 EST 1986 · J. Vac. Sci. Technol., A; (United States)

DOI:https://doi.org/10.1116/1.573672· OSTI ID:7243159

Johnson, R N; Sheldon, G L

Electrospark deposition (ESD) is a pulsed-arc microwelding process using short-duration, high-current electrical pulses to deposit an electrode material on a metallic substrate. It is one of the few methods available by which a fused, metallurgically bonded coating can be applied with such a low total heat input that the bulk substrate material remains at or near ambient temperatures. The short duration of the electrical pulse allows an extremely rapid solidification of the deposited material and results in an exceptionally fine-grained, homogeneous coating that approaches (and with some materials, actually is) an amorphous structure. This structure is believed to contribute to the good tribological and corrosion performance observed for hardsurfacing materials used in the demanding environments of high temperatures, liquid metals, and neutron irradiation. A brief historical review of the process is provided, followed by descriptions of the present state of the art and of the performance and applications of electrospark deposition coating in liquid--metal-cooled nuclear reactors.

• Research Organization: Westinghouse Hanford Company, Richland, Washington 99352
• OSTI ID: 7243159
• Journal Information: J. Vac. Sci. Technol., A; (United States), Vol. 4:6
• Country of Publication: United States
• Language: English

Related Subjects

22 GENERAL STUDIES OF NUCLEAR REACTORS
ELECTRODEPOSITED COATINGS
CORROSION RESISTANCE
WEAR RESISTANCE
ELECTRODEPOSITION
ELECTRIC SPARKS
PERFORMANCE
REACTOR COMPONENTS
AMORPHOUS STATE
REACTOR MATERIALS
TRIBOLOGY
COATINGS
DEPOSITION
ELECTRIC DISCHARGES
ELECTROLYSIS
LYSIS
MATERIALS
MECHANICAL PROPERTIES
SURFACE COATING
220200* - Nuclear Reactor Technology- Components & Accessories