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    7FAstage 1 abradable coatings and method for making same
    1.
    发明申请
    7FAstage 1 abradable coatings and method for making same 审中-公开
    7FAstage 1耐磨涂料及其制备方法

    公开(公告)号：US20050003172A1

    公开(公告)日：2005-01-06

    申请号：US10895886

    申请日：2004-07-22

    申请人： James Wheeler ,  Farshad Ghasripoor ,  Chek Beng Ng ,  Raymond Chupp ,  Donald Baldwin ,  Yuk-Chiu Lau ,  Tara McGovern

    发明人： James Wheeler ,  Farshad Ghasripoor ,  Chek Beng Ng ,  Raymond Chupp ,  Donald Baldwin ,  Yuk-Chiu Lau ,  Tara McGovern

    IPC分类号： C23C4/00 ,  B05D3/02 ,  B32B3/00

    CPC分类号： F01D11/122 ,  C23C4/01 ,  C23C4/02 ,  C23C4/04 ,  C23C4/11 ,  C23C4/134 ,  C23C4/18 ,  C23C4/185 ,  F05D2230/312 ,  F05D2250/183 ,  F05D2300/15 ,  Y10T428/12611 ,  Y10T428/24802 ,  Y10T428/24926

    摘要： A method of applying a profiled abradable coating onto a substrate in which an abradable ceramic coating composition is applied to a metal substrate using one or more coating application techniques to produce a defined ceramic pattern without requiring a separate web or grid to be brazed onto the substrate. The invention is particularly designed to withstand the higher operating temperatures encountered with the stage 1 section of 7FA+e gas turbines to allow for increased coating life without significant deterioration in structural or functional integrity. Typically, the grid pattern coating begins approximately 0.431″ after the leading edge of the shroud, and ends approximately 1.60″ before the trailing edge of the shroud. In the case of diamond-shaped patterns, the grid pattern will be about 0.28″ long and 0.28″ wide, with an overall thickness of about 0.46.″ The coatings thus provide the required levels of abradability and leakage performance and may be applied as a chevron or diamond pattern with the shape oriented such that the diagonals run perpendicular and parallel to the sides of the shroud.

    摘要翻译： 将成型的可磨损涂层施加到基底上，其中使用一种或多种涂覆施加技术将可磨损的陶瓷涂层组合物施加到金属基底上以产生限定的陶瓷图案，而不需要将单独的腹板或网格钎焊到基底上 。 本发明特别设计用于承受7FA + e燃气轮机的阶段1部分遇到的更高的工作温度，以允许更长的涂层寿命，而结构或功能完整性没有显着恶化。 通常，网格图案涂层在护罩的前缘大约0.431“开始，并且在护罩的后缘之前大约为1.60”。 在菱形图案的情况下，网格图案将为约0.28“长和0.28”宽，总厚度约为0.46“。因此，涂层提供所需的耐磨性和泄漏性能水平，并且可能 应用为人字形或菱形图案，其形状定向成使得对角线垂直并平行于护罩的侧面延伸。

    High temperature abradable coating for turbine shrouds without bucket tipping
    3.
    发明授权
    High temperature abradable coating for turbine shrouds without bucket tipping 有权
    高温耐磨涂层用于无铲斗倾翻的涡轮机罩

    公开(公告)号：US06660405B2

    公开(公告)日：2003-12-09

    申请号：US09863760

    申请日：2001-05-24

    申请人： Yuk-Chiu Lau ,  Farshad Ghasripoor ,  Dennis M. Gray ,  Chek Beng Ng

    发明人： Yuk-Chiu Lau ,  Farshad Ghasripoor ,  Dennis M. Gray ,  Chek Beng Ng

    IPC分类号： B32B518

    CPC分类号： C23C4/02 ,  C23C4/04 ,  Y10T428/12479 ,  Y10T428/12736 ,  Y10T428/1275 ,  Y10T428/12771 ,  Y10T428/12931 ,  Y10T428/12944 ,  Y10T428/12951 ,  Y10T428/249953

    摘要： An abradable coating composition for use on shrouds in gas turbine engines (or other hot gas path metal components exposed to high temperatures) containing an initial porous coating phase created by adding a “fugitive polymer” (such as polyester or polyimide) to the base metal alloy, together with a brittle intermetallic phase such as &bgr;-NiAl that serves to increase the brittle nature of the metal matrix, thereby increasing the abradability of the coating at elevated temperatures, and to improve the oxidation resistance of the coating at elevated temperatures. Coatings having about 12 wt % polyester has been found to exhibit excellent abradability for applications involving turbine shroud coatings. An abradable coating thickness in the range of between 40 and 60 ml provides the best performance for turbine shrouds exposed to gas temperatures between 1380° F. and 1850° F. Abradable coatings in accordance with the invention can be used for new metal components or to repair existing equipment.

    摘要翻译： 一种用于燃气涡轮发动机（或暴露于高温的其它热气体通道金属组分）的护罩上的耐磨涂层组合物，其包含通过向基体金属添加“短暂性聚合物”（例如聚酯或聚酰亚胺）而产生的初始多孔涂层相 合金，以及诸如β-NiAl的脆性金属间相，其用于增加金属基体的脆性，从而提高涂层在高温下的耐磨性，并提高涂层在高温下的抗氧化性。 已经发现具有约12重量％聚酯的涂层对于涉及涡轮机护罩涂层的应用表现出优异的耐磨性。 40至60毫升范围内的可磨损涂层厚度为暴露于1380°F至1850°F之间的气体温度的涡轮机罩提供了最佳性能。根据本发明的可磨损涂层可用于新的金属组分或 修理现有设备。