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11. 发明授权

US06579567B1 Process for selectively masking turbine components during vapor phase diffusion coating 有权
标题翻译：在气相扩散涂层期间选择性地掩蔽涡轮机部件的方法
公开(公告)号：US06579567B1
公开(公告)日：2003-06-17
申请号：US09711565
申请日：2000-11-13
申请人： Nripendra N. Das , Raymond W. Heidorn , Patricia A. Charles , Thomas E. Mantkowski
发明人： Nripendra N. Das , Raymond W. Heidorn , Patricia A. Charles , Thomas E. Mantkowski
IPC分类号： C23C1604
CPC分类号： C23C8/04 , C23C10/04 , C23C14/50 , Y10T29/49318
摘要： Apparatus and method to improve vapor phase diffusion coating of articles. The apparatus provides a barrier to segregate the portion of the article requiring coating from the portion of the article not requiring coating. The fixture is reusable, being unaffected by the coating gases. The fixture reduces the exposure of the coating gases with the portion of the article not requiring coating. By use of an optional seal, the portion of the article not requiring coating can be isolated from the coating gases.
摘要翻译：改善制品气相扩散涂层的装置和方法。该装置提供了隔离物，从而使需要涂层的制品的部分从不需要涂覆的部分分离。夹具可重复使用，不受涂层气体的影响。固定装置可减少涂层气体与不需要涂层的物品部分的接触。通过使用可选的密封件，不需要涂覆的制品的部分可以与涂覆气体隔离。

12. 发明授权

US06440496B1 Method of forming a diffusion aluminide coating 有权
标题翻译：形成扩散铝化物涂层的方法
公开(公告)号：US06440496B1
公开(公告)日：2002-08-27
申请号：US09487103
申请日：2000-01-19
申请人： Bhupendra K. Gupta , Thomas E. Mantkowski , Nripendra N. Das , Raymond W. Heidorn
发明人： Bhupendra K. Gupta , Thomas E. Mantkowski , Nripendra N. Das , Raymond W. Heidorn
IPC分类号： C23C1606
CPC分类号： C23C28/324 , C23C10/50 , C23C10/52 , C23C12/00 , C23C12/02 , C23C28/321 , C23C28/345 , C23C28/3455 , Y10T428/12549 , Y10T428/12611 , Y10T428/12618
摘要： A thermal barrier coating system and a method for forming the coating system on a component designed for use in a hostile thermal environment, such as superalloy turbine, combustor and augmentor components of a gas turbine engine. The coating system includes a diffusion aluminide bond coat whose oxide growth rate is significantly reduced to improve the spallation resistance of a thermal barrier layer by forming the bond coat to include a dispersion of aluminum, chromium, nickel, cobalt and/or platinum group metal oxides. The oxides preferably constitute about 5 to about 20 volume percent of the bond coat. A preferred method of forming the bond coat is to initiate a diffusion aluminizing process in the absence of oxygen to deposit a base layer of diffusion aluminide, and then intermittently introduce an oxygen-containing gas into the diffusion aluminizing process to form within the bond coat the desired dispersion of oxides. Thereafter, a ceramic layer is deposited on the bond coat to form a thermal barrier coating.
摘要翻译：一种热障涂层系统和一种在设计用于恶劣热环境的部件上形成涂层系统的方法，例如燃气涡轮发动机的超级合金涡轮机，燃烧器和增压器部件。涂层体系包括扩散铝化物粘合涂层，其氧化物生长速率显着降低，以通过形成粘合涂层来改善热障层的抗剥落性，包括铝，铬，镍，钴和/或铂族金属氧化物的分散体。氧化物优选构成约5至约20体积％的粘合涂层。形成粘合涂层的优选方法是在不存在氧的情况下开始扩散镀铝工艺以沉积扩散铝化物的基底层，然后间歇地将含氧气体引入扩散镀铝工艺以在粘合涂层内形成所需的氧化物分散体。此后，在接合涂层上沉积陶瓷层以形成热障涂层。

13. 发明授权

US06326057B1 Vapor phase diffusion aluminide process 有权
标题翻译：气相扩散铝化物工艺
公开(公告)号：US06326057B1
公开(公告)日：2001-12-04
申请号：US09474549
申请日：1999-12-29
申请人： Nripendra N. Das , Thomas E. Mantkowski , Jackie L. King , Floyd A. Swigert , W. Michael Gmerek, Jr.
发明人： Nripendra N. Das , Thomas E. Mantkowski , Jackie L. King , Floyd A. Swigert , W. Michael Gmerek, Jr.
IPC分类号： C23C1600
摘要： A process for forming a diffusion aluminide coating on an article, such as a component for a gas turbine engine. The process is a vapor phase process that generally entails placing the article in a coating chamber containing an aluminum donor material, without any halide carrier or inert filler present. The aluminum donor material consists essentially of about 20 to about 70 weight percent aluminum, with the balance being chromium or cobalt. While the article is held out of contact with the donor material, coating is initiated in an inert or reducing atmosphere by heating the article and the donor material to vaporize the aluminum constituent of the donor material, which then condenses on the surface of the article and diffuses into the surface to form a diffusion aluminide coating on the article.
摘要翻译：用于在诸如燃气涡轮发动机的部件的物品上形成扩散铝化物涂层的方法。该方法是气相法，其通常需要将物品置于包含铝供体材料的涂层室中，而不存在任何卤化物载体或惰性填料。铝供体材料基本上由约20至约70重量％的铝组成，余量为铬或钴。虽然制品与供体材料不接触，但是通过加热制品和供体材料来在惰性或还原性气氛中引发涂层，以蒸发供体材料的铝组分，然后将其冷凝在制品的表面上，扩散到表面以在制品上形成扩散的铝化物涂层。

14. 发明授权

US06224673B1 Apparatus for masking turbine components during vapor phase diffusion coating 有权
标题翻译：用于在气相扩散涂层期间遮蔽涡轮机部件的装置
公开(公告)号：US06224673B1
公开(公告)日：2001-05-01
申请号：US09372106
申请日：1999-08-11
申请人： Nripendra N. Das , Raymond W. Heidorn , Patricia A. Charles , Thomas E. Mantkowski
发明人： Nripendra N. Das , Raymond W. Heidorn , Patricia A. Charles , Thomas E. Mantkowski
IPC分类号： C23C1600
CPC分类号： C23C8/04 , C23C10/04 , C23C14/50 , Y10T29/49318
摘要： Apparatus and method to improve vapor phase diffusion coating of articles. The apparatus provides a barrier to segregate the portion of the article requiring coating from the portion of the article not requiring coating. The fixture is reusable, being unaffected by the coating gases. The fixture reduces the exposure of the coating gases with the portion of the article not requiring coating. By use of an optional seal, the portion of the article not requiring coating can be isolated from the coating gases.
摘要翻译：改善制品气相扩散涂层的装置和方法。该装置提供了隔离物，从而使需要涂层的制品的部分从不需要涂覆的部分分离。夹具可重复使用，不受涂层气体的影响。固定装置可减少涂层气体与不需要涂层的物品部分的接触。通过使用可选的密封件，不需要涂覆的制品的部分可以与涂覆气体隔离。

15. 发明授权

US06174448B1 Method for stripping aluminum from a diffusion coating 失效
标题翻译：从扩散涂层中剥离铝的方法
公开(公告)号：US06174448B1
公开(公告)日：2001-01-16
申请号：US09032790
申请日：1998-03-02
申请人： Nripendra N. Das , Howard J. Farr , Raymond W. Heidorn
发明人： Nripendra N. Das , Howard J. Farr , Raymond W. Heidorn
IPC分类号： C23F100
CPC分类号： F01D5/288 , C23C10/60 , C23F1/44 , C23G5/00
摘要： A method of removing a diffusion aluminide coating on a component designed for use in a hostile environment, such as superalloy turbine, combustor and augmentor components of a gas turbine engine. The method selectively removes an aluminide coating by stripping aluminum from the coating without causing excessive attack, alloy depletion and gross thinning of the underlying superalloy substrate. Processing steps generally include contacting the coating with a mixture that contains a halogen-containing activator and a metallic powder containing an aluminide-forming metal constituent, such as by pack cementation-type process. The mixture is then heated to a temperature sufficient to vaporize the halogen-containing activator and for a duration sufficient to cause the halogen-containing activator to provide a transfer mechanism for the removal of aluminum from at least a portion of the diffusion aluminide coating, while the metallic powder absorbs the removed aluminum.
摘要翻译：在设计用于恶劣环境的部件上移除扩散铝化物涂层的方法，例如燃气涡轮发动机的超级合金涡轮机，燃烧器和增压器部件。该方法通过从涂层中剥离铝而选择性地除去铝化物涂层，而不会引起过度的侵蚀，合金消耗和下层超级合金基底的粗化。加工步骤通常包括使涂层与包含含卤素活化剂的混合物和含有形成铝化物的金属成分的金属粉末接触，例如通过包装胶结法处理。然后将混合物加热到足以蒸发含卤素活化剂的温度，持续足够的时间使得含卤素活化剂提供用于从扩散铝化物涂层的至少一部分去除铝的转移机理，同时金属粉末吸收除去的铝。

16. 发明授权

US6039810A High temperature vapor coating container 有权
标题翻译：高温蒸气涂装容器
公开(公告)号：US6039810A
公开(公告)日：2000-03-21
申请号：US191660
申请日：1998-11-13
申请人： Thomas E. Mantkowski , Nripendra N. Das , Raymond W. Heidorn , Jackie L. King
发明人： Thomas E. Mantkowski , Nripendra N. Das , Raymond W. Heidorn , Jackie L. King
IPC分类号： F01D5/28 , C23C14/14 , C23C14/24 , C23C16/12 , C23C16/44 , C23C16/458 , C23C26/00 , C23C16/00 , F16L25/00
CPC分类号： C23C16/458 , C23C16/44 , Y10S285/905 , Y10T403/217
摘要： A high temperature vapor coating container, including a hollow interior, resists distortion and cracking at a vapor coating temperature of at least about 1700.degree. F. as a result of making the container of a nonmetallic material having a coefficient of thermal expansion of less than about 4.5.times.10.sup.-6 at the vapor coating temperature, the material being nonreactive with the coating vapor at the vapor coating temperature.
摘要翻译：包括中空内部的高温蒸汽涂层容器在至少约1700°F的蒸气涂覆温度下抵抗变形和开裂，这是因为使具有小于约的热膨胀系数的非金属材料的容器在蒸气涂覆温度下为4.5×10-6，该材料在蒸气涂覆温度下与涂层蒸气不反应。

17. 发明授权

US6014263A Optical lens and method of preventing clouding thereof at high temperatures 失效
标题翻译：光学透镜及其在高温下防止其混浊的方法
公开(公告)号：US6014263A
公开(公告)日：2000-01-11
申请号：US71109
申请日：1998-05-04
申请人： Jon C. Schaeffer , Nripendra N. Das , Brian F. Mickle , Ching-Ho Wang , Matthew S. Tomaszewski , Kevin G. McAllister
发明人： Jon C. Schaeffer , Nripendra N. Das , Brian F. Mickle , Ching-Ho Wang , Matthew S. Tomaszewski , Kevin G. McAllister
IPC分类号： G02B1/10 , G02B27/00 , G02B3/00
CPC分类号： G02B27/0006 , G02B1/105
摘要： A method for preventing clouding of a lens employed in a high-temperature oxidizing environment, an example of which is a lens of a pyrometer used to sense exhaust gas temperature (EGT) of a gas turbine engine. Clouding is prevented by inhibiting the generation of volatile oxide species that react with high-temperature lens materials, forming deposits including oxides of chromium, molybdenum and other elements having volatile oxide species. The method is particularly directed to a pyrometer whose lens is formed of sapphire (alumina) or silica, and is mounted within a structure formed of a material containing chromium and/or molybdenum, such as a superalloy or stainless steel. The method entails forming an alumina scale-forming barrier coating such as a diffusion aluminide on surfaces of the structure that are subject to oxidation and high temperatures. According to the invention, the alumina scale formed by the barrier coating inhibits the generation of other oxides at the coated surfaces, which would otherwise form volatile oxides that react with and form deposit on the lens. By inhibiting the formation of oxides other than alumina on surfaces surrounding the lens, lens clouding caused from volatile oxides is avoided. As a result, the optical performance of the lens is not degraded, and the precision of a pyrometer employing the lens to sense temperatures is maintained during operation of the engine.
摘要翻译：一种用于防止在高温氧化环境中使用的透镜的混浊的方法，其实例是用于感测燃气涡轮发动机的排气温度（EGT）的高温计的透镜。通过抑制与高温透镜材料反应的挥发性氧化物物质的产生，形成含有铬，钼和其它具有挥发性氧化物的元素的沉积物来防止云层。该方法特别涉及其透镜由蓝宝石（氧化铝）或二氧化硅形成的高温计，并且安装在由含有铬和/或钼的材料（例如超级合金或不锈钢）形成的结构内。该方法需要在经受氧化和高温的结构的表面上形成氧化铝垢形成阻挡涂层，例如扩散铝化物。根据本发明，通过阻挡涂层形成的氧化铝垢阻止了在涂覆表面产生其它氧化物，否则其将形成与透镜反应并形成沉积在透镜上的挥发性氧化物。通过抑制在透镜周围的表面上形成氧化铝以外的氧化物，避免了由挥发性氧化物引起的透镜混浊。结果，透镜的光学性能不降低，并且在发动机的操作期间保持采用透镜感测温度的高温计的精度。

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