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    SELECTIVE ALUMINIDE COATING PROCESS
    35.
    发明专利
    SELECTIVE ALUMINIDE COATING PROCESS 未知

    公开(公告)号：SG132637A1

    公开(公告)日：2007-06-28

    申请号：SG2006081145

    申请日：2006-11-22

    Applicant: UNITED TECHNOLOGIES CORP

    Inventor： OLSON WALTER E

    Abstract: A method for coating internal surfaces of a turbine engine component comprises flowing an aluminide containing gas into passages in the turbine engine component so as to coat the internal surfaces formed by the passages, allowing the aluminide containing gas to flow through the passages and out openings in external surfaces of the turbine engine component, and flowing a volume of a gas selected from the group consisting of argon, hydrogen, and mixtures thereof over the external surfaces to minimize any build-up of an aluminide coating on the external surfaces.

    37.
    发明专利
    未知

    公开(公告)号：DE69732466D1

    公开(公告)日：2005-03-17

    申请号：DE69732466

    申请日：1997-10-09

    Applicant: UNITED TECHNOLOGIES CORP

    Inventor： OLSON WALTER E ,  PIETRUSKA NORMAN ,  DRAGHI PETER JON

    IPC: C23C24/08 ,  C23C10/04 ,  C23C10/48 ,  C23C26/00

    Abstract: The invention relates to a low activity localised aluminide coating for a metallic article made by positioning a coating material, preferably in the form of a tape, on a portion of the article. The coating material comprises a binder, a halide activator, an aluminum source, and an inert ceramic material. The coating material and the article are heated in an inert atmosphere between about 1800 DEG F (982 DEG C) and about 2050 DEG F (1121 DEG C) for between about four and about seven hours thereby producing a low activity localized aluminide coating having an outward diffusion aluminide coating microstructure characterized by two distinct zones, an inner diffusion zone and an outer zone including between about 20-28 percent, by weight, aluminum.

    38.
    发明专利
    未知

    公开(公告)号：DE69117129T2

    公开(公告)日：1996-07-04

    申请号：DE69117129

    申请日：1991-10-03

    Applicant: UNITED TECHNOLOGIES CORP

    Inventor： GRYBOWSKI EDWARD JAMES ,  OLSON WALTER E

    IPC: C23C10/28 ,  C23C10/08 ,  C23C16/20

    Abstract: A process for forming a diffusion coating to the surface of a metal article. The process is particularly adapted for forming diffusion aluminide coatings on metal blades and vanes used in gas turbine engines. According to the invention, halide vapor is caused to react with a source of aluminum to form an aluminum rich halide gas. This gas then reacts with the part surface to form the aluminide coating. A key aspect of the invention relates to the timing of the reaction between the halide vapor and the source of aluminum.

    39.
    发明专利
    未知

    公开(公告)号：DE68921194D1

    公开(公告)日：1995-03-23

    申请号：DE68921194

    申请日：1989-12-08

    Applicant: UNITED TECHNOLOGIES CORP

    Inventor： GUPTA DINESH K ,  OLSON WALTER E

    IPC: C22C19/00 ,  C23C4/08 ,  C23C10/02 ,  C23C10/48 ,  C23C28/02

    Abstract: A protective coating system for superalloys is described. The coating is an active element enriched aluminide, and can be formed by aluminizing an overlay coated superalloy, wherein during the aluminizing process, aluminum diffuses completely through the overlay coating and into the substrate. The coating system exhibits desirable oxidation resistance and resistance to thermal fatigue cracking, due to the presence of oxygen active elements in the overlay.

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