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Patent Agency Ranking
公开(公告)号：US11598008B2
公开(公告)日：2023-03-07
申请号：US16878523
申请日：2020-05-19
Applicant: Westinghouse Electric Company LLC
Inventor： Paolo Ferroni , Peng Xu , Michael Ickes , Hwasung Yeom , Kumar Sridharan , Benjamin R. Maier , Greg O. Johnson
Abstract: Disclosed is a method for manufacturing free-standing cladding tubes with multi-layer structures. According to the method, a cylindrical mandrel substrate defining a hollow cylindrical inner space is provided. A first cold spray powder metal is selected. The cylindrical mandrel substrate is rotated and the first cold spray powder metal is applied to an outer surface of the cylindrical mandrel substrate to form a first layer. The cylindrical mandrel substrate is removed.
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公开(公告)号：US11443857B2
公开(公告)日：2022-09-13
申请号：US16573544
申请日：2019-09-17
Inventor： Edward J. Lahoda , Peng Xu , Zeses Karoutas , Sumit Ray , Kumar Sridharan , Benjamin Maier , Greg Johnson
Abstract: A zirconium alloy cladding tube for use in a water cooled nuclear reactor under normal operating conditions and under high temperature oxidation conditions is described. The cladding tube has a coating uniformly deposited thereon. The coating, which may be up to 300 microns thick, is selected from the group consisting of chromium, a chromium-based alloy, and combinations thereof.
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公开(公告)号：US10566095B2
公开(公告)日：2020-02-18
申请号：US15284076
申请日：2016-10-03
Inventor： Edward J. Lahoda , Peng Xu , Zeses Karoutas , Sumit Ray , Kumar Sridharan , Benjamin Maier , Greg Johnson
Abstract: A method is provided for coating the substrate of a component, such as a zirconium alloy cladding tube, for use in a water cooled nuclear reactor under normal operating conditions and under high temperature oxidation conditions. The method includes heating a pressurized carrier gas to a temperature between 200° C. and 1200° C., adding chromium or chromium-based alloy particles having an average diameter of 20 microns or less to the heated carrier gas, and spraying the carrier gas and particles onto the substrate at a velocity, preferably from 800 to 4000 ft./sec. (about 243.84 to 1219.20 meters/sec.), to form a chromium and/or chromium-based alloy coating on the substrate to a desired thickness.
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公开(公告)号：US11043308B2
公开(公告)日：2021-06-22
申请号：US15722167
申请日：2017-10-02
Inventor： Edward J. Lahoda , Peng Xu , Robert Oelrich , Kumar Sridharan , Benjamin Maier , Greg Johnson
Abstract: A method is described for forming duplex layers including an interlayer and a corrosion resistant boundary layer on a nuclear fuel rod cladding tube for use in a water cooled nuclear reactor. The method includes forming, by thermal deposition or physical vapor deposition, on the exterior of a substrate, an inner interlayer with Mo, Ta, W or Nb or other particles, and forming, by thermal deposition or physical vapor deposition, on the interlayer, an outer corrosion resistant layer with particles selected from the group consisting of Cr, a Cr alloy, and combinations thereof. The interlayer prevents eutectic formation between the corrosion resistant layer and the substrate.
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5.发明申请公开(公告)号：US20200161010A1
公开(公告)日：2020-05-21
申请号：US16196005
申请日：2018-11-20
Inventor： Edward J. Lahoda , Peng Xu , Robert L. Oelrich, JR. , Hwasung Yeom , Kumar Sridharan
Abstract: The invention relates to SiC ceramic matrix composite (CMC) claddings with metallic, ceramic and/or multilayer coatings applied on the outer surface for improved corrosion resistance and hermeticity protection. The coating includes one or more materials selected from FeCrAl, Y, Zr and Al—Cr alloys, Cr2O3, ZrO2 and other oxides, chromium carbides, CrN, Zr- and Y-silicates and silicides. The coatings are applied employing a variety of known surface treatment technologies including cold spray, thermal spray process, physical vapor deposition process (PVD), and slurry coating.
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