B - Operations – Transporting – 32 – B
Patent
B - Operations, Transporting
32
B
B32B 15/16 (2006.01) B05B 7/20 (2006.01) C23C 4/10 (2006.01) C23C 4/12 (2006.01)
Patent
CA 2119430
ABSTRACT OF THE DISCLOSURE A thermal spray gun includes a nozzle member with an axial conduit that conveys a powder stream of heat fusible oxide ceramic in a carrier gas. The conduit terminates at the nozzle face in a plurality of radially divergent orifices. A gas cap extends from the nozzle member and defines a combustion chamber. An annular flow of a combustible mixture is injected from the nozzle member coaxially into the combustion chamber. Air is injected adjacently to the gas cap wall so that a spray stream containing the ceramic is propelled through the open end, preferably supersonic. An aluminum oxide coating sprayed thereby should comprise substantial alpha phase and have good dielectric breakdown strength.
Gianella Edward P.
Mercurio Joseph P.
Osler Hoskin & Harcourt Llp
Perkin-Elmer Corporation The
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