Global Patent Index - EP 0621079 A1

EP 0621079 A1 19941026 - Dense oxide coatings by thermal spraying.

Title (en)

Dense oxide coatings by thermal spraying.

Title (de)

Dichte Oxidbeschichtungen beim thermischen Spritzen.

Title (fr)

Revêtement d'oxyde dense par pulvérisation thermique.

Publication

EP 0621079 A1 19941026 (EN)

Application

EP 94106071 A 19940419

Priority

US 4971893 A 19930420

Abstract (en)

A thermal spray gun (10) includes a nozzle member with an axial conduit (34) that conveys a powder stream of heat fusible oxide ceramic in a carrier gas. The conduit (34) terminates at the nozzle face in a plurality of radially divergent orifices (65). A gas cap (14) extends from the nozzle member and defines a combustion chamber (82). An annular flow of a combustible mixture is injected from the nozzle member coaxially into the combustion chamber (82). 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. <IMAGE>

IPC 1-7

B05B 7/20; C23C 4/12

IPC 8 full level

B05B 7/20 (2006.01); C23C 4/10 (2006.01); C23C 4/12 (2006.01)

CPC (source: EP)

B05B 7/205 (2013.01); C23C 4/11 (2016.01); C23C 4/129 (2016.01)

Citation (search report)

  • [YA] FR 1161232 A 19580825 - METALLIZING ENGINEERING CO
  • [Y] US 3455510 A 19690715 - ROTOLICO ANTHONY J
  • [YA] US 2976166 A 19610321 - WHITE ROBERT E, et al
  • [Y] DE 3806177 A1 19890907 - SIEMENS AG [DE]
  • [A] US 5148986 A 19920922 - RUSCH WILLIAM P [US]
  • [A] EP 0379119 A1 19900725 - PERKIN ELMER CORP [US]
  • [A] FR 1260838 A 19610512 - METALLIZING ENGINEERING CO INC
  • [A] EP 0142816 A2 19850529 - HUHNE ERWIN
  • [A] P. FAUCHAIS, A. VARDELLE, M. VARDELLE, J. F. COUDERT AND J. LESINSKI: "CORRELATION OF THE PHYSICAL PROPERTIES OF SPRAYED CERAMIC COATING TO THE TEMPERATURE AND VELOCITY OF THE PARTICULES TRAVELLING IN ATMOSPHERIC PLASMA JETS: MEASUREMENTS, MODELLING AND COMPARISON", THIN SOLID FILMS, vol. 121, no. 4, November 1984 (1984-11-01), LAUSANNE, SWITZERLAND, pages 303 - 316
  • [A] PATENT ABSTRACTS OF JAPAN vol. 12, no. 462 (C - 549)<3309> 5 December 1988 (1988-12-05)
  • [A] DATABASE WPI Week 8631, Derwent World Patents Index; AN 86-201813
  • [A] PATENT ABSTRACTS OF JAPAN vol. 12, no. 115 (E - 599) 12 April 1988 (1988-04-12)

Designated contracting state (EPC)

CH DE FR GB IT LI

DOCDB simple family (publication)

EP 0621079 A1 19941026; BR 9401543 A 19941122; CA 2119430 A1 19941021; JP H06312149 A 19941108

DOCDB simple family (application)

EP 94106071 A 19940419; BR 9401543 A 19940419; CA 2119430 A 19940318; JP 8191394 A 19940420