An exploration of the cold gas-dynamic spray method for several materials systems

Conference · Sun Dec 31 00:00:00 EST 1995

OSTI ID:377729

McCune, R C ^[1]; Papyrin, A N ^[2]; Hall, J N ^[3]; Riggs, II, W L ^[4]; Zajchowski, P H ^[5]

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1. Ford Motor Co., Dearborn, MI (United States)
2. Russian Academy of Sciences, Novosibirsk (Russian Federation)
3. General Motors Corp., Warren, MI (United States)
4. TubalCain Co., Loveland, OH (United States)
5. United Technologies Corp., East Hartford, CT (United States). Pratt and Whitney Div.

This paper reports activities of a consortium of companies formed under the aegis of the National Center for Manufacturing Sciences (NCMS) to explore a cold gas-dynamic spray method (CGSM) developed in Russia by Alkhimov, Papyrin and coworkers. In this spray process metal powder particles develop into a coating as a result of ballistic impingement on a suitable substrate. In some instances, surface preparation of the substrate using such traditional methods as grit blasting is unnecessary. The spray nozzle used in this process has been designed so as to permit introduction of powder particles into a preheated gas stream which is then rendered supersonic by expansion through a converging-diverging throat, with accompanying temperature reduction. Thus, the temperature of the gas stream is always below the melting point of the particulate material, providing coatings developed primarily from particles in the solid state. The fundamentals of CGSM are reviewed and results from several material combinations explored in the first phase of the research program are presented. Experimental coatings including copper on alumina ceramic, steel on cast aluminum, and a chromium carbide composite on titanium were produced. Typical microstructures, porosity, adhesion, and physical characteristics of these coatings are discussed.

• OSTI ID: 377729
• Report Number(s): CONF-9509182-; ISBN 0-87170-541-9; TRN: IM9643%%2
• Resource Relation: Conference: 1995 National thermal spray conference, Houston, TX (United States), 11-15 Sep 1995; Other Information: PBD: 1995; Related Information: Is Part Of Advances in thermal spray science and technology. Proceedings of the 8. national thermal spray conference; Berndt, C.C.; Sampath, S. [eds.]; PB: 795 p.
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
COPPER
SPRAY COATING
STEELS
COMPOSITE MATERIALS
CHROMIUM CARBIDES
NICKEL ALLOYS
CHROMIUM ALLOYS
POWDERS
NOZZLES
TEMPERATURE DEPENDENCE
PRESSURE DEPENDENCE
GAS FLOW
NITROGEN
HELIUM
VELOCITY
ALUMINIUM
ALUMINIUM OXIDES
TITANIUM ALLOYS
ALUMINIUM ALLOYS
VANADIUM ALLOYS
POROSITY
MICROHARDNESS
MICROSTRUCTURE