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    • 3. 发明授权
    • Electrochemical machining process, electrode therefor and turbine bucket with turbulated cooling passage
    • 电化学加工工艺,其电极和涡轮机桶与紊流冷却通道
    • US06416283B1
    • 2002-07-09
    • US09688579
    • 2000-10-16
    • Robert A. JohnsonChing-Pang LeeBin WeiHsin-Pang Wang
    • Robert A. JohnsonChing-Pang LeeBin WeiHsin-Pang Wang
    • F01D508
    • B23H1/04B23H9/10B23H9/14F05B2260/222
    • An electrode having a dielectric coating is patterned to provide axially spaced rows of insulating material on the external surface of the electrode with one or more gaps in the insulating material of each row. The electrode is placed in a preformed hole of a turbine bucket and an electrolyte is provided for flow between the electrode and the walls of the hole. Upon application of an electrical current, portions of the material of the interior wall surface directly opposite the non-insulated portions of the electrode are dissolved, forming grooves. The insulated portions of the electrode leave axially spaced rows of projections extending toward the axis of the hole. The gaps in the rows or projections are axially misaligned. The projections form turbulators in the cooling flow passages of the bucket, enhancing the heat transfer coefficient.
    • 具有电介质涂层的电极被图案化以在电极的外表面上提供轴向隔开的一排绝缘材料,其中每行的绝缘材料中具有一个或多个间隙。 将电极放置在涡轮机桶的预制孔中,并且提供电解质以在电极和孔的壁之间流动。 在施加电流时,直接与电极的非绝缘部分相对的内壁表面的材料部分被溶解,形成凹槽。 电极的绝缘部分沿着孔的轴线离开轴向间隔开的一列突起。 行或突起中的间隙轴向不对准。 这些突起在铲斗的冷却流动通道中形成涡轮,提高了传热系数。
    • 4. 发明授权
    • Method for repairing a thermal barrier coating and repaired coating formed thereby
    • 用于修复由此形成的热障涂层和修补的涂层的方法
    • US06413578B1
    • 2002-07-02
    • US09687721
    • 2000-10-12
    • William R. StowellRobert A. JohnsonAndrew J. SkoogJoseph Thomas BegovichThomas Walter RentzJane Ann MurphyChing-Pang LeeDainel P. Ivkovich, Jr.
    • William R. StowellRobert A. JohnsonAndrew J. SkoogJoseph Thomas BegovichThomas Walter RentzJane Ann MurphyChing-Pang LeeDainel P. Ivkovich, Jr.
    • B05D106
    • C23C24/08Y02T50/67Y10T428/20Y10T428/24479Y10T428/24521Y10T428/25Y10T428/252
    • A method of repairing a thermal barrier coating on a component designed for use in a hostile thermal environment, such as turbine, combustor and augmentor components of a gas turbine engine. The method more particularly involves repairing a thermal barrier coating on a component that has suffered localized spallation of the thermal barrier coating. After cleaning the surface area of the component exposed by the localized spallation, a ceramic paste comprising a ceramic powder in a binder is applied to the surface area of the component. The binder is then reacted to yield a ceramic-containing repair coating that covers the surface area of the component and comprises the ceramic powder in a matrix of a material formed when the binder was reacted. The binder is preferably a ceramic precursor material that can be converted immediately to a ceramic or allowed to thermally decompose over time to form a ceramic, such that the repair coating has a ceramic matrix. The repair method can be performed while the component remains installed, e.g., in a gas turbine engine. Immediately after the reaction step, the gas turbine engine can resume operation during which the binder is further reacted/converted and the strength of the repair coating increases.
    • 在设计用于恶劣热环境中的部件(例如燃气涡轮发动机的涡轮机,燃烧器和增压器部件)上修复热障涂层的方法。 该方法更具体地涉及在已经遭受热障涂层的局部剥落的部件上修复热障涂层。 在清洁通过局部剥离暴露的部件的表面积之后,将包含粘合剂中的陶瓷粉末的陶瓷膏施加到部件的表面区域。 然后使粘合剂反应以产生覆盖部件的表面积的含陶瓷的修补涂层,并且包含当粘合剂反应时形成的材料的基质中的陶瓷粉末。 粘合剂优选是陶瓷前体材料,其可以立即转化成陶瓷或随时间而热分解形成陶瓷,使得修补涂层具有陶瓷基体。 当部件保持安装时,例如在燃气涡轮发动机中,可以执行修理方法。 在反应步骤之后,燃气涡轮发动机可以立即恢复操作,在此期间粘合剂进一步反应/转化,并且修复涂层的强度增加。
    • 5. 发明授权
    • Component with repaired thermal barrier coating
    • 具有修复热障涂层的组件
    • US06919121B2
    • 2005-07-19
    • US10153929
    • 2002-05-23
    • William R. StowellRobert A. JohnsonAndrew J. SkoogJoseph Thomas BegovichThomas Walter RentzJane Ann MurphyChing-Pang LeeDainel P. Ivkovich, Jr.
    • William R. StowellRobert A. JohnsonAndrew J. SkoogJoseph Thomas BegovichThomas Walter RentzJane Ann MurphyChing-Pang LeeDainel P. Ivkovich, Jr.
    • F01D5/28C23C4/10C23C18/06C23C18/12C23C24/08C23C26/00C23C28/00F02C7/00B32B35/00
    • C23C24/08Y02T50/67Y10T428/20Y10T428/24479Y10T428/24521Y10T428/25Y10T428/252
    • A method of repairing a thermal barrier coating (16) on a component (10) designed for use in a hostile thermal environment, such as turbine, combustor and augmentor components of a gas turbine engine. The method more particularly involves repairing a thermal barrier coating (16) on a component (10) that has suffered localized spallation (20) of the thermal barrier coating (16). After cleaning the surface area (22) of the component (10) exposed by the localized spallation (20), a ceramic paste (24) comprising a ceramic powder in a binder is applied to the surface area (22) of the component (10). The binder is then reacted to yield a ceramic-containing repair coating (26) that covers the surface area of the component and comprises the ceramic powder in a matrix of a material formed when the binder was reacted. The binder is preferably a ceramic precursor material that can be converted immediately to a ceramic or allowed to thermally decompose over time to form a ceramic, such that the repair coating (26) has a ceramic matrix. The repair method can be performed while the component (10) remains installed, e.g., in a gas turbine engine. Immediately after the reaction step, the gas turbine engine can resume operation during which the binder is further reacted/converted and the strength of the repair coating increases.
    • 修复设计用于恶劣热环境的部件(10)上的热障涂层(16)的方法,所述部件(10)用于燃气涡轮发动机的涡轮机,燃烧器和增压器部件。 该方法更具体地涉及修复已经遭受热隔离涂层(16)的局部剥落(20)的部件(10)上的热障涂层(16)。 在清洁通过局部剥离(20)暴露的组分(10)的表面积(22)之后,将包含粘合剂中的陶瓷粉末的陶瓷浆料(24)施加到组分(10)的表面区域(22) )。 然后使粘合剂反应以产生覆盖部件的表面积的含陶瓷的修补涂层(26),并且将包含在粘合剂反应时形成的材料的基质中的陶瓷粉末。 粘合剂优选是陶瓷前体材料,其可以立即转化为陶瓷或随时间而热分解形成陶瓷,使得修补涂层(26)具有陶瓷基体。 可以在组件(10)保持安装(例如,在燃气涡轮发动机中)的情况下执行修理方法。 在反应步骤之后,燃气涡轮发动机可以立即恢复操作,在此期间粘合剂进一步反应/转化,并且修复涂层的强度增加。