Principles and applications of electro-spark deposition
Electro-spark deposition (ESD) is a pulsed-arc micro-welding process using short-duration, high-current electrical pulsed 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 an amorphous structure. This structure is believed to contribute to the good tribological and corrosion performance observed for hardsurfacing materials used in demanding environments. A brief historical review of the process is provided, followed by descriptions of the present state-of-the-art, of the performance and applications of electro-spark deposition coatings in nuclear and fossil energy environments, and of potential applications in development. 23 refs., 23 figs., 3 tabs.
- Research Organization:
- Westinghouse Hanford Co., Richland, WA (USA)
- DOE Contract Number:
- AC06-87RL10930
- OSTI ID:
- 7006599
- Report Number(s):
- WHC-SA-0210; CONF-880187-1; ON: DE88011943
- Resource Relation:
- Conference: 1. international conference on surface modification technologies, Phoenix, AZ, USA, 27 Jan 1988; Other Information: Portions of this document are illegible in microfiche products
- Country of Publication:
- United States
- Language:
- English
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33 ADVANCED PROPULSION SYSTEMS
ARC WELDING
PULSE TECHNIQUES
CHROMIUM CARBIDES
ELECTRODEPOSITION
TECHNOLOGY ASSESSMENT
ALUMINIUM
CARBIDES
CHROMIUM
COATINGS
COMPUTERIZED CONTROL SYSTEMS
COPPER
ELECTRIC SPARKS
ELECTRODEPOSITED COATINGS
ELECTRODES
ELECTROMETALLURGY
FUEL ELEMENTS
GOLD
IRIDIUM
IRON ALLOYS
MOLYBDENUM
MOLYBDENUM ALLOYS
NICKEL
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NIOBIUM
NIOBIUM ALLOYS
PALLADIUM
PLATINUM
PULSE CIRCUITS
SILVER
STEELS
STELLITE
SUBSTRATES
SURFACE PROPERTIES
SURFACE TREATMENTS
TANTALUM ALLOYS
TITANIUM ALLOYS
TRIBALOY 400
TRIBALOY 700
TRIBALOY 800
TRIBOLOGY
TUNGSTEN ALLOYS
USES
ZIRCONIUM ALLOYS
ALLOYS
CARBON COMPOUNDS
CHROMIUM ALLOYS
CHROMIUM COMPOUNDS
COBALT ALLOYS
COBALT BASE ALLOYS
CONTROL SYSTEMS
DEPOSITION
ELECTRIC DISCHARGES
ELECTROLYSIS
ELECTRONIC CIRCUITS
ELEMENTS
FABRICATION
HEAT RESISTANT MATERIALS
HEAT RESISTING ALLOYS
IRON BASE ALLOYS
JOINING
LYSIS
MATERIALS
METALLURGY
METALS
NICKEL BASE ALLOYS
PLATINUM METALS
REACTOR COMPONENTS
SURFACE COATING
TRANSITION ELEMENT COMPOUNDS
TRANSITION ELEMENTS
WELDING
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