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1. 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。

2. 发明授权

US06458473B1 Diffusion aluminide bond coat for a thermal barrier coating system and method therefor 失效
标题翻译：用于热障涂层体系的扩散铝化物粘合涂层及其方法
公开(公告)号：US06458473B1
公开(公告)日：2002-10-01
申请号：US08786814
申请日：1997-01-21
申请人： Jeffrey A. Conner , Bangalore A. Nagaraj , Joseph A. Heaney, III , Nripendra N. Das , Patricia A. Zomcik , David J. Wortman , David V. Rigney , Jon C. Schaeffer
发明人： Jeffrey A. Conner , Bangalore A. Nagaraj , Joseph A. Heaney, III , Nripendra N. Das , Patricia A. Zomcik , David J. Wortman , David V. Rigney , Jon C. Schaeffer
IPC分类号： B21D3900
CPC分类号： C23C28/00 , C03C27/046 , C22C5/04 , C22C30/00 , C23C10/52 , F05B2230/90 , F05C2253/12 , Y10T428/12549 , Y10T428/12611 , Y10T428/12618 , Y10T428/12667
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 method is particularly directed to a thermal barrier coating system that includes a thermal insulating ceramic layer and a diffusion aluminide bond coat on which an aluminum oxide scale is grown to protect the underlying surface of the component and to chemically bond the ceramic layer. The bond coat is formed to contain an additive metal of platinum, palladium, rhodium, chromium and/or silicon, and an additive element of yttrium and/or zirconium, with possible additions of hafnium. The bond coat may be formed by codepositing aluminum with the active element, or by depositing the additive metal and active element on the surface of the component, and then aluminizing to form the diffusion aluminide bond coat.
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。该方法特别涉及一种热障涂层系统，其包括绝热陶瓷层和扩散铝化物粘合涂层，其上生长氧化铝垢以保护部件的下表面并化学粘合陶瓷层。形成粘合涂层以包含铂，钯，铑，铬和/或硅的添加金属和钇和/或锆的添加元素，可能添加铪。粘结涂层可以通过将铝与活性元素共沉积，或者通过将添加剂金属和活性元素沉积在组分的表面上，然后镀铝以形成扩散铝化物粘合涂层而形成。

3. 发明授权

US06168874A Diffusion aluminide bond coat for a thermal barrier coating system and method therefor 失效
标题翻译：用于热障涂层体系的扩散铝化物粘合涂层及其方法
公开(公告)号：US06168874A
公开(公告)日：2001-01-02
申请号：US09016975
申请日：1998-02-02
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： B32B900
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中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。

4. 发明授权

US06616969B2 Apparatus and method for selectively coating internal and external surfaces of an airfoil 失效
标题翻译：用于选择性地涂覆翼型的内表面和外表面的装置和方法
公开(公告)号：US06616969B2
公开(公告)日：2003-09-09
申请号：US09929595
申请日：2001-08-14
申请人： Jeffrey A. Pfaendtner , Joseph D. Rigney , Nripendra N. Das , Ramgopal Darolia
发明人： Jeffrey A. Pfaendtner , Joseph D. Rigney , Nripendra N. Das , Ramgopal Darolia
IPC分类号： C23C1608
CPC分类号： C23C16/042 , C23C16/045 , Y02T50/67
摘要： A gas turbine airfoil has an external surface and an internal passage therethrough. The internal passage is selectively coated by providing a source of a flowable precursor coating material in contact with the internal passage of the airfoil, and providing a coating prevention structure overlying at least a portion of the external surface. The flowable precursor coating material is flowed from the source of the flowable precursor coating material and through the internal passage of the airfoil. The coating prevention structure prevents contact of the flowable precursor coating material with the external surface of the airfoil.
摘要翻译：燃气涡轮机翼型件具有外表面和穿过其的内部通道。通过提供与翼型件的内部通道接触的可流动的前体涂料的源，选择性地涂覆内部通道，并且提供覆盖在外表面的至少一部分上的防涂层结构。可流动的前体涂层材料从可流动的前体涂层材料的源头流过翼型件的内部通道。涂层防止结构防止可流动的前体涂层材料与翼型件的外表面的接触。

5. 发明授权

US06488986B2 Combined coat, heat treat, quench method for gas turbine engine components 失效
标题翻译：燃气轮机发动机部件组合外套，热处理，淬火方法
公开(公告)号：US06488986B2
公开(公告)日：2002-12-03
申请号：US09771897
申请日：2001-01-29
申请人： Nripendra N. Das , Terri K. Brown , Matthew D. Saylor , Brian H. Pilsner , Carl H. Snyder
发明人： Nripendra N. Das , Terri K. Brown , Matthew D. Saylor , Brian H. Pilsner , Carl H. Snyder
IPC分类号： C23C1606
CPC分类号： C23C10/08 , C23C10/60
摘要： A method for imparting an aluminide coating to an alloy gas turbine engine component, heat treating the component, and quenching the component. The component is exposed to a source of aluminum at an elevated temperature in a coating furnace to deposit an aluminum-based oxidation barrier on the component, heated in the coating furnace to a temperature of at least the solution temperature of the alloy, and quenched by flowing a chilled inert gas around the component in the coating furnace to cool the component from the temperature of at least the solution temperature of the alloy to a temperature at which a gamma′ phase of the alloy is set in the alloy in less than about 10 minutes.
摘要翻译：一种赋予合金燃气轮机发动机部件的铝化物涂层的方法，对该部件进行热处理，并淬火该部件。该组件在涂覆炉中在升高的温度下暴露于铝源，以在涂层炉中沉积铝基氧化屏障，在涂层炉中加热至至少合金溶液温度，并通过使冷却的惰性气体围绕涂覆炉中的组件流动，以将组分从至少合金的溶液温度的温度冷却至合金中γ相以小于约10的温度分钟。

6. 发明授权

US06334907B1 Method of controlling thickness and aluminum content of a diffusion aluminide coating 失效
标题翻译：控制扩散铝化物涂层的厚度和铝含量的方法
公开(公告)号：US06334907B1
公开(公告)日：2002-01-01
申请号：US09417468
申请日：1999-10-13
申请人： Nripendra N. Das , Thomas E. Mantkowski , Jeffrey A. Conner
发明人： Nripendra N. Das , Thomas E. Mantkowski , Jeffrey A. Conner
IPC分类号： C23C800
CPC分类号： C23C16/12 , C23C10/08
摘要： A process for forming a diffusion aluminide coating on a substrate, such as a component for a gas turbine engine. The process generally entails placing the substrate in a suitable coating chamber, flowing an inert or reducing gas into and through the coating chamber, and then aluminizing the substrate using an aluminizing technique with a substantially constant aluminum activity, such as a vapor phase deposition process. During the aluminizing process, the amount of unreacted aluminum within the coating chamber is controlled by altering the flow rate of the gas through the coating chamber so that a portion of the unreacted aluminum is swept from the coating chamber by the gas. The amount of unreacted aluminum swept from the coating chamber is regulated by metering the gas flow rate in order to control the aluminizing rate and aluminum content of the resulting aluminide coating.
摘要翻译：在基底上形成扩散铝化物涂层的方法，例如用于燃气涡轮发动机的部件。该方法通常需要将基底放置在合适的涂布室中，使惰性或还原性气体流入涂层室并通过涂层室，然后使用具有基本上恒定的铝活性的镀铝技术（例如气相沉积工艺）使基底镀铝。在镀铝过程中，通过改变通过涂覆室的气体的流速来控制涂覆室内的未反应铝的量，使得一部分未反应的铝被气体从涂覆室扫过。通过计量气体流速来调节从涂覆室扫过的未反应铝的量，以便控制所得铝化物涂层的镀铝速率和铝含量。

7. 发明授权

US06555179B1 Aluminizing process for plasma-sprayed bond coat of a thermal barrier coating system 失效
标题翻译：隔热涂层系统的等离子喷涂粘结涂层的镀铝工艺
公开(公告)号：US06555179B1
公开(公告)日：2003-04-29
申请号：US09527270
申请日：2000-03-17
申请人： Jim D. Reeves , Bhupendra K. Gupta , Nripendra N. Das
发明人： Jim D. Reeves , Bhupendra K. Gupta , Nripendra N. Das
IPC分类号： C23C406
CPC分类号： C23C28/3215 , C23C4/18 , C23C10/02 , C23C10/08 , C23C28/321 , C23C28/325 , C23C28/3455
摘要： A thermal barrier coating system and a method for forming the coating system on an article designed for use in a hostile thermal environment. The method is particularly directed to a coating system that includes a plasma-sprayed MCrAlY bond coat on which a thermal-insulating APS ceramic layer is deposited, in which the oxidation resistance of the bond coat and the spallation resistance of the ceramic layer are substantially increased by vapor phase aluminizing the bond coat. The bond coat is deposited to have a surface area ratio of at least 1.4 and a surface roughness of at least 300 &mgr;inch Ra in order to promote the adhesion of the ceramic layer. The bond coat is then overcoat aluminized using a vapor phase process that does not alter the surface area ratio of the bond coat. This process is carried out at relatively low temperatures that promote inward diffusion of aluminum relative to outward diffusion of the bond coat constituents, particularly nickel and other refractory elements. The process conditions also provide sufficient vapor phase activity at the surface of the bond coat that promote aluminum atomic movement through the bond coat.
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中的物品上形成涂层系统的方法。该方法特别涉及包括等离子体喷涂的MCrAlY粘结涂层的涂覆体系，其上沉积有绝热的APS陶瓷层，其中粘合涂层的抗氧化性和陶瓷层的抗剥落性大大增加通过气相渗透粘结涂层。为了促进陶瓷层的粘附，沉积粘合涂层以使表面积比至少为1.4，表面粗糙度为至少300μm。然后使用不改变粘结涂层的表面积比的气相方法将粘合涂层进行外涂镀铝。该过程在相对低的温度下进行，其促进铝相对于粘合涂层成分，特别是镍和其它难熔元素的向外扩散的向内扩散。工艺条件还在粘合涂层的表面提供足够的气相活性，促进铝原子通过粘结涂层的运动。

8. 发明授权

US06306458B1 Process for recycling vapor phase aluminiding donor alloy 失效
标题翻译：回收汽相铝化合物合金的方法
公开(公告)号：US06306458B1
公开(公告)日：2001-10-23
申请号：US09474548
申请日：1999-12-29
申请人： Thomas E. Mantkowski , Nripendra N. Das , Keith H. Betscher , Raymond W. Heidorn , Jackie L. King , Floyd A. Swigert
发明人： Thomas E. Mantkowski , Nripendra N. Das , Keith H. Betscher , Raymond W. Heidorn , Jackie L. King , Floyd A. Swigert
IPC分类号： B32B3500
CPC分类号： C23C8/06
摘要： A process for reclaiming aluminum alloy donor from a vapor phase deposition process used to form a diffusion aluminide coating on a component, such as the high-temperature superalloy components of gas turbine engines. The process generally entails recycling a particulate aluminum alloy donor material that, as a result of having been used as the donor material for depositing a diffusion aluminide coating on an article by vapor phase deposition, particles of the donor material comprise an aluminum alloy core encased in an aluminum-depleted shell. The process generally entails tumbling the donor material in a manner that removes the aluminum-depleted shell, followed by sieving the donor material to remove shell fragments and undersized particles.
摘要翻译：用于从气相沉积工艺回收铝合金供体的方法，用于在诸如燃气涡轮发动机的高温超合金部件的组分上形成扩散铝化物涂层。该方法通常需要循环使用颗粒状铝合金供体材料，该材料由于已被用作通过气相沉积在制品上沉积扩散铝化物涂层的供体材料的结果，供体材料的颗粒包含铝合金芯一个铝耗尽的壳。该方法通常需要以去除贫铝壳的方式翻转供体材料，然后筛选供体材料以除去壳碎片和尺寸过小的颗粒。

9. 发明授权

US6146696A Process for simultaneously aluminizing nickel-base and cobalt-base superalloys 有权
标题翻译：镍基和钴基超级合金同时镀铝的工艺
公开(公告)号：US6146696A
公开(公告)日：2000-11-14
申请号：US318644
申请日：1999-05-26
申请人： Nripendra N. Das , Patricia A. Charles , Raymond W. Heidorn
发明人： Nripendra N. Das , Patricia A. Charles , Raymond W. Heidorn
IPC分类号： F01D5/28 , C23C10/08 , C23C10/48 , C23C16/08
CPC分类号： C23C10/48
摘要： A process for simultaneously vapor phase aluminizing nickel-base and cobalt-base superalloys within a single process chamber using the same aluminum donor and activator, to yield diffusion aluminide coatings of approximately equal thickness. The process entails the use of an aluminum donor containing about 50 to about 60 weight percent aluminum, and an aluminum fluoride activator present in an amount of at least 1 gram per liter of coating chamber volume. Nickel-base and cobalt-base superalloys are simultaneously vapor phase aluminized for 4.5 to 5.5 hours at a temperature of about 1900.degree. F. to about 1950.degree. F. in an inert or reducing atmosphere. With these materials and process parameters, diffusion aluminide coatings are developed on both superalloys whose thicknesses do not differ from each other by more than about 30%.
摘要翻译：使用相同的铝供体和活化剂在单个处理室内同时气相渗透镍基和钴基超级合金的方法，以产生大致相等厚度的扩散铝化物涂层。该方法需要使用含有约50至约60重量％的铝的铝供体和以每升涂层室体积至少1克的量存在的氟化铝活化剂。在惰性或还原气氛中，在约1900°F至约1950°F的温度下，镍基和钴基超级合金同时进行气相镀铝4.5至5.5小时。利用这些材料和工艺参数，在两个超级合金上开发了扩散铝化物涂层，其厚度彼此不相差大约30％。

10. 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。

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