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    4.
    发明专利
    未知

    公开(公告)号：IT1167452B

    公开(公告)日：1987-05-13

    申请号：IT2267480

    申请日：1980-06-10

    Applicant: UNITED TECHNOLOGIES CORP

    Inventor： SOKOL LARRY STEVEN ,  COMAS CHARLES CARTER ,  HANNA EARL MUNN

    IPC: B05B7/22 ,  B05C5/04 ,  C23C4/00 ,  C23C4/12 ,  C23D

    Abstract: A plasma spray method capable of directing plasticized powders against a substrate for deposition of a protective coating thereon is disclosed. Various structural details of the apparatus described enable the attainment of high particle velocities without melting the particles. The technical concepts employed are directed to normalizing the temperature of the plasma stream at a reduced value prior to the injection of coating particles. A general reduction in temperature and substantial elimination of a thermal spike at the core of the stream are achieved. Coating particles are injected into the plasma stream only after the plasma is first cooled and then preferably accelerated. In detailed embodiments, a nozzle extension assembly having a plasma cooling zone, a plasma acceleration zone, a powder injection zone and a plasma/powder discharge zone is affixed to the downstream end of a conventional plasma generator.

    7.
    发明专利
    未知

    公开(公告)号：FR2458973A1

    公开(公告)日：1981-01-02

    申请号：FR8012490

    申请日：1980-06-05

    Applicant: UNITED TECHNOLOGIES CORP

    Inventor： SOKOL LARRY STEVEN ,  MCCOMAS CHARLES CARTER ,  HANNA EARL MUNN

    IPC: B05B7/22 ,  B05C5/04 ,  C23C4/00 ,  C23C4/12 ,  H05H1/42 ,  C23C7/00

    Abstract: A plasma spray method capable of directing plasticized powders against a substrate for deposition of a protective coating thereon is disclosed. Various structural details of the apparatus described enable the attainment of high particle velocities without melting the particles. The technical concepts employed are directed to normalizing the temperature of the plasma stream at a reduced value prior to the injection of coating particles. A general reduction in temperature and substantial elimination of a thermal spike at the core of the stream are achieved. Coating particles are injected into the plasma stream only after the plasma is first cooled and then preferably accelerated. In detailed embodiments, a nozzle extension assembly having a plasma cooling zone, a plasma acceleration zone, a powder injection zone and a plasma/powder discharge zone is affixed to the downstream end of a conventional plasma generator.

    PLASMA SPRAY
    10.
    发明专利
    PLASMA SPRAY 未知

    公开(公告)号：AU530584B2

    公开(公告)日：1983-07-21

    申请号：AU5899680

    申请日：1980-06-03

    Applicant: UNITED TECHNOLOGIES CORP

    Inventor： SOKOL LARRY STEVEN ,  MCCOMAS CHARLES CARTER ,  HANNA EARL MUNN

    IPC: B05B7/22 ,  B05C5/04 ,  C23C4/00 ,  C23C4/12 ,  B05B5/00 ,  H05H1/34 ,  H05H1/42

    Abstract: A plasma spray method capable of directing plasticized powders against a substrate for deposition of a protective coating thereon is disclosed. Various structural details of the apparatus described enable the attainment of high particle velocities without melting the particles. The technical concepts employed are directed to normalizing the temperature of the plasma stream at a reduced value prior to the injection of coating particles. A general reduction in temperature and substantial elimination of a thermal spike at the core of the stream are achieved. Coating particles are injected into the plasma stream only after the plasma is first cooled and then preferably accelerated. In detailed embodiments, a nozzle extension assembly having a plasma cooling zone, a plasma acceleration zone, a powder injection zone and a plasma/powder discharge zone is affixed to the downstream end of a conventional plasma generator.

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