Patents by Inventor Ichiro Nagano
Ichiro Nagano has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Publication number: 20190168327Abstract: A method for producing a turbine blade includes performing brazing treatment, performing annealing, and subjecting a base material to solutionizing treatment. In the brazing treatment, a brazing material is welded to be joined to the base material of a turbine blade by operating a heater to perform heating at a first temperature under a state in which the base material having the brazing material arranged thereon is placed in a predetermined heating furnace including the heater. In annealing, the base material is cooled by stopping the heater and lowering a furnace internal temperature after the brazing treatment. In the solutionizing treatment, ductility of the base material is improved through heating at a second temperature lower than the first temperature after the annealing.Type: ApplicationFiled: October 5, 2017Publication date: June 6, 2019Inventors: Daisuke YOSHIDA, Kazuto NISHIZAWA, Masaki TANEIKE, Ichiro NAGANO, Naotoshi OKAYA, Yoshiyuki INOUE, Hisataka KAWAI, Hisashi KITAGAKI
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Patent number: 10259034Abstract: A slurry for forming a mold includes a silica sol as a dispersion medium and niobia-stabilized zirconia dispersed in the silica sol.Type: GrantFiled: March 4, 2015Date of Patent: April 16, 2019Assignee: MITSUBISHI HEAVY INDUSTRIES, LTD.Inventors: Hidetaka Oguma, Kazutaka Mori, Ichiro Nagano, Masato Shida, Ikuo Okada, Ryota Okimoto, Yoshitaka Uemura
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Patent number: 10150707Abstract: A method for producing a thermal spray powder includes: a preparing step of preparing a powder mixture containing a first particle made from zirconia-based ceramic containing a first additive agent and a second particle made from zirconia-based ceramic containing a second additive agent, the powder mixture having a 10% cumulative particle diameter of more than 0 ?m and not more than 10 ?m; and a secondary-particle producing step of producing a plurality of secondary particles each of which includes the first particle and the second particle sintered with each other.Type: GrantFiled: August 25, 2015Date of Patent: December 11, 2018Assignee: MITSUBISHI HITACHI POWER SYSTEMS, LTD.Inventors: Taiji Torigoe, Ichiro Nagano, Yoshifumi Okajima, Ikuo Okada, Masahiko Mega, Yoshitaka Uemura, Naotoshi Okaya, Shusuke Sakuma
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Patent number: 9822437Abstract: A process for producing a thermal barrier coating having an excellent thermal barrier effect and superior durability to thermal cycling. Also, a turbine member having a thermal barrier coating that has been formed using the production process, and a gas turbine. The process for producing a thermal barrier coating includes: forming a metal bonding layer (12) on a heat-resistant alloy substrate (11), and forming a ceramic layer (13) on the metal bonding layer (12) by thermal spraying of thermal spray particles having a particle size distribution in which the 10% cumulative particle size is not less than 30 ?m and not more than 100 ?m.Type: GrantFiled: August 30, 2010Date of Patent: November 21, 2017Assignee: MITSUBISHI HITACHI POWER SYSTEMS, LTD.Inventors: Taiji Torigoe, Ichiro Nagano, Ikuo Okada, Keizo Tsukagoshi, Kazutaka Mori, Yoshiaki Inoue, Yoshitaka Uemura, Yoshifumi Okajima, Hideaki Kaneko, Masahiko Mega
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Publication number: 20170260101Abstract: A method for producing a thermal spray powder includes: a preparing step of preparing a powder mixture containing a first particle made from zirconia-based ceramic containing a first additive agent and a second particle made from zirconia-based ceramic containing a second additive agent, the powder mixture having a 10% cumulative particle diameter of more than 0 ?m and not more than 10 ?m; and a secondary-particle producing step of producing a plurality of secondary particles each of which includes the first particle and the second particle sintered with each other.Type: ApplicationFiled: August 25, 2015Publication date: September 14, 2017Applicant: MITSUBISHI HITACHI POWER SYSTEMS, LTD.Inventors: Taiji TORIGOE, Ichiro NAGANO, Yoshifumi OKAJIMA, Ikuo OKADA, Masahiko MEGA, Yoshitaka UEMURA, Naotoshi OKAYA, Shusuke SAKUMA
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Publication number: 20160354836Abstract: A slurry for forming a mold includes a silica sol as a dispersion medium and niobia-stabilized zirconia dispersed in the silica sol.Type: ApplicationFiled: March 4, 2015Publication date: December 8, 2016Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD.Inventors: Hidetaka OGUMA, Kazutaka MORI, Ichiro NAGANO, Masato SHIDA, Ikuo OKADA, Ryota OKIMOTO, Yoshitaka UEMURA
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Publication number: 20160349115Abstract: A temperature estimation method includes the steps of measuring a content of a tetragonal-prime phase included in a coating layer formed on a surface of a high temperature member by X-ray diffraction or Rietveld analysis, Raman spectroscopy, or the like; and estimating a surface temperature of the high temperature member based on the estimated content of the tetragonal-prime phase.Type: ApplicationFiled: February 5, 2015Publication date: December 1, 2016Inventors: Ruifen WU, Taiji TORIGOE, Ichiro NAGANO, Yoshifumi OKAJIMA, Yasuhiko TSURU
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Patent number: 8586169Abstract: There are provided a thermal barrier coating material and a thermal barrier coating member that can suppress spalling when used at a high temperature and have a high thermal barrier effect, a method for producing the same, a turbine member coated with a thermal barrier coating, and a gas turbine. The thermal barrier coating member comprises a heat resistant substrate, a bond coat layer formed thereon, and a ceramic layer formed further thereon, wherein the ceramic layer comprises an oxide which consists of an oxide represented by the general formula A2Zr2O7 doped with a predetermined amount of CaO or MgO and has 10 volume % or more of a pyrochlore type crystal structure, where A represents any of La, Nd, Sm, Gd, and Dy.Type: GrantFiled: October 6, 2006Date of Patent: November 19, 2013Assignee: Mitsubishi Heavy Industries, Ltd.Inventors: Katsumi Namba, Taiji Torigoe, Ikuo Okada, Kazutaka Mori, Ichiro Nagano, Yutaka Kawata, Koji Takahashi
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Publication number: 20130202912Abstract: A process for producing a thermal barrier coating having an excellent thermal barrier effect and superior durability to thermal cycling. Also, a turbine member having a thermal barrier coating that has been formed using the production process, and a gas turbine. The process for producing a thermal barrier coating includes: forming a metal bonding layer (12) on a heat-resistant alloy substrate (11), and forming a ceramic layer (13) on the metal bonding layer (12) by thermal spraying of thermal spray particles having a particle size distribution in which the 10% cumulative particle size is not less than 30 ?m and not more than 100 ?m.Type: ApplicationFiled: August 30, 2010Publication date: August 8, 2013Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD.Inventors: Taiji Torigoe, Ichiro Nagano, Ikuo Okada, Keizo Tsukagoshi, Kazutaka Mori, Yoshiaki Inoue, Yoshitaka Uemura, Yoshifumi Okajima, Hideaki Kaneko, Masahiko Mega
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Patent number: 8370084Abstract: A method by which physical properties, including the Young's modulus and thermal conductivity of a ceramic layer of a thermal barrier coating formed on a high-temperature member, are quickly and accurately estimated. A method for estimating a physical property of a ceramic includes a step of calculating the Larson-Miller parameter from the time for which and the temperature at which the ceramic is heated; a step of acquiring the porosity of the ceramic corresponding to the calculated Larson-Miller parameter, based on the calculated Larson-Miller parameter and a diagram correlating the Larson-Miller parameter and the porosity obtained from samples having the same composition as the ceramic; and a step of acquiring the physical property of the ceramic corresponding to the acquired porosity, based on the acquired porosity and a diagram correlating the porosity and the physical property obtained from samples having the same composition as the ceramic.Type: GrantFiled: March 13, 2009Date of Patent: February 5, 2013Assignee: Mitsubishi Heavy Industries, Ltd.Inventors: Katsumi Namba, Taiji Torigoe, Ikuo Okada, Kazutaka Mori, Yasuhiko Tsuru, Masato Shida, Ichiro Nagano, Eisaku Ito, Koji Takahashi
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Patent number: 8288019Abstract: A surface coating film includes, a base material which is a hard material; and an oxidation-resistance coating layer containing, as a main component, a complex oxide of Li and at least Al and covering a surface of the base material. Further, a method of manufacturing a surface coated member, includes, supporting a base material which is a hard material in a hermetic container with the use of a holder arranged in the container; arranging a complex oxide forming target containing Li and at least Al, as main components, in the container; feeding oxygen into the container; and forming an oxidation-resistance coating layer that covers the base material to obtain the surface coated member by effecting electric discharge between the complex oxide forming target as an anode and the holder as a cathode.Type: GrantFiled: February 5, 2008Date of Patent: October 16, 2012Assignee: Mitsubishi Heavy Industries, Ltd.Inventors: Ichiro Nagano, Taiji Kikuchi, Masakatsu Fujita, Yukio Kodama, Toyoaki Yasui, Katsunori Akiyama, Toshiya Watanabe, Chiaki Yasuda
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Publication number: 20110262770Abstract: A thermal barrier coating material that exhibits superior high-temperature crystal stability to YSZ, as well as a high degree of toughness and an excellent thermal barrier effect. Also provided are a thermal barrier coating, which has a ceramic layer formed using the thermal barrier coating material and exhibits excellent durability to heat cycling, and a turbine member and a gas turbine which are each provided with the thermal barrier coating. The thermal barrier coating material comprises mainly ZrO2 which contains Yb2O3 and Sm2O3 as stabilizers, wherein the amount of the stabilizers is not less than 2 mol % and not more than 7 mol %, and the amount of the Sm2O3 is not less than 0.1 mol % and not more than 2.5 mol %.Type: ApplicationFiled: November 27, 2009Publication date: October 27, 2011Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD.Inventors: Taiji Torigoe, Ichiro Nagano, Ikuo Okada, Keizo Tsukagoshi, Koji Takahashi, Yoshifumi Okajima, Soji Kasumi, Eisaku Ito, Kazutaka Mori
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Publication number: 20100242797Abstract: A thermal barrier coating material having a lower thermal conductivity than rare earth stabilized zirconia materials. A thermal barrier coating material comprising mainly a compound represented by composition formula (1): Ln1-xTaxO1.5+x wherein 0.13?x?0.24, and Ln represents one or more elements selected from the group consisting of Sc, Y and the lanthanoid elements. Also, a thermal barrier coating material comprising mainly a compound represented by composition formula (2): Ln1-xNbxO1.5+x wherein 0.13?x?0.24, and Ln represents one or more elements selected from the group consisting of Sc, Y and the lanthanoid elements. Also, a thermal barrier coating material comprising mainly a cubic compound having a fluorite structure represented by composition formula (3): Ln3NbO7 wherein Ln represents one or more elements selected from the group consisting of Sc, Y and the lanthanoid elements.Type: ApplicationFiled: February 3, 2009Publication date: September 30, 2010Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD.Inventors: Ichiro Nagano, Taiji Torigoe, Katsunori Akiyama, Masato Shida, Kazutaka Mori, Yasuhiko Tsuru, Ikuo Okada
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Publication number: 20100217540Abstract: A method is provided by which physical properties, in particular, the Young's modulus and thermal conductivity of a ceramic layer of a thermal barrier coating formed on a high-temperature member are accurately estimated in a short period of time. A method for estimating a physical property of a ceramic includes a step of calculating the Larson-Miller parameter from the time for which and the temperature at which the ceramic is heated; a step of acquiring the porosity of the ceramic corresponding to the calculated Larson-Miller parameter, based on the calculated Larson-Miller parameter and a diagram correlating the Larson-Miller parameter and the porosity obtained from samples having the same composition as the ceramic; and a step of acquiring the physical property of the ceramic corresponding to the acquired porosity, based on the acquired porosity and a diagram correlating the porosity and the physical property obtained from samples having the same composition as the ceramic.Type: ApplicationFiled: March 13, 2009Publication date: August 26, 2010Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD.Inventors: Katsumi Namba, Taiji Torigoe, Ikuo Okada, Kazutaka Mori, Yasuhiko Tsuru, Masato Shida, Ichiro Nagano, Eisaku Ito, Koji Takahashi
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Publication number: 20100086370Abstract: Provided is a surface coating film having a high degree of hardness and an excellent oxidation-resistance, and a method of manufacturing thereof, a cutting tool and a cutting machine. In the surface coating film, an oxidation-resistance layer containing, as a main component, a complex oxide of Li and at least Al, is coated on the outer surface of a base material, direct thereonto or through the intermediary of a highly hard coating layer.Type: ApplicationFiled: February 5, 2008Publication date: April 8, 2010Applicant: MITSUBISHI HEAVY INDUSTRIES ,LTD.Inventors: Ichiro Nagano, Taiji Kikuchi, Masakatsu Fujita, Yukio Kodama, Toyoaki Yasui, Katsunori Akiyama, Toshiya Watanabe, Chiaki Yasuda
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Patent number: 7622411Abstract: There is provided a novel thermal barrier coating material which does not have a problem of phase transition, whose melting point is higher than its working temperature range, whose thermal conductivity is smaller than that of zirconia, and whose thermal expansion coefficient is greater than that of zirconia. The thermal barrier coating material comprises as a main component, a composition having an orthorhombic or monoclinic structure derived from perovskite (for example, a tabular perovskite structure expressed by the composition formula A2B2O7), or a tetragonal layer structure having a c axis/a axis ratio equal to or greater than 3 (for example, a K2NiF4 structure, a Sr3Ti2O7 structure, or a Sr4Ti3O10 structure), a composition expressed by the composition formula LaTaO4, or a composition having an olivine type structure expressed by the composition formula M2SiO4 or (MM?)2SiO4 (where M, M? are divalent metal elements).Type: GrantFiled: March 24, 2004Date of Patent: November 24, 2009Assignee: Mitsubishi Heavy Industries, Ltd.Inventors: Katsunori Akiyama, Ichiro Nagano, Masato Shida, Satoshi Ota
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Publication number: 20090176059Abstract: There are provided a thermal barrier coating material and a thermal barrier coating member that can suppress spalling when used at a high temperature and have a high thermal barrier effect, a method for producing the same, a turbine member coated with a thermal barrier coating, and a gas turbine. The thermal barrier coating member comprises a heat resistant substrate, a bond coat layer formed thereon, and a ceramic layer formed further thereon, wherein the ceramic layer comprises an oxide which consists of an oxide represented by the general formula A2Zr2O7 doped with a predetermined amount of CaO or MgO and has 10 volume % or more of a pyrochlore type crystal structure, where A represents any of La, Nd, Sm, Gd, and Dy.Type: ApplicationFiled: October 6, 2006Publication date: July 9, 2009Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD.Inventors: Katsumi Namba, Taiji Torigoe, Ikuo Okada, Kazutaka Mori, Ichiro Nagano, Yutaka Kawata, Koji Takahashi
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Publication number: 20070151481Abstract: There is provided a novel thermal barrier coating material which does not have a problem of phase transition, whose melting point is higher than its working temperature range, whose thermal conductivity is smaller than that of zirconia, and whose thermal expansion coefficient is greater than that of zirconia. The thermal barrier coating material comprises as a main component, a composition having an orthorhombic or monoclinic structure derived from perovskite (for example, a tabular perovskite structure expressed by the composition formula A2B2O7), or a tetragonal layer structure having a c axis/a axis ratio equal to or greater than 3 (for example, a K2NiF4 structure, a Sr3Ti2O7 structure, or a Sr4Ti3O10 structure), a composition expressed by the composition formula LaTaO4, or a composition having an olivine type structure expressed by the composition formula M2SiO4 or (MM?)2SiO4 (where M, M? are divalent metal elements).Type: ApplicationFiled: March 24, 2004Publication date: July 5, 2007Applicant: Mitsubishi Heavy Industries, LtdInventors: Katsunori Akiyama, Ichiro Nagano, Masato Shida, Satoshi Ota
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Publication number: 20070111032Abstract: The present invention provides a surface-coated article possessing a high hardness coating that has a Vickers hardness that is equal to or greater than that of conventional high hardness coatings, and which has an oxidation initiation temperature, which is an expression of resistance to oxidation, that is higher than that of conventional high hardness coatings. A coating layer containing a compound nitride that employs as main components Al and at least one element selected from the group consisting of Zr, Hf, Pd, Ir and the rare earth elements is formed on or over a base material.Type: ApplicationFiled: October 24, 2006Publication date: May 17, 2007Inventors: Ichiro Nagano, Taiji Kikuchi, Masakatsu Fujita, Fujita Masakatsu, Yukio Kodama, Toyoaki Yasui, Yuichiro Murakami
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Patent number: 6081579Abstract: In a crystal structure analysis using an X-ray diffraction method or the like, using a measured value y.sup.0 i of a sample and an expected crystal structure parameter, a vector F having the logarithmic conversion value of the measured value as a matrix element is determined by f.sub.i =k.multidot.log(y.sub.i +.delta.-b.sub.i) from a value y.sub.i of the measured value y.sup.0 i after count missing correction of a detector, a background strength b.sub.i and a positive value .delta. of less than 1, a vector F.sub.c having the logarithmic conversion value of the calculated value as a matrix element is obtained by F.sub.ci =k.multidot.log(y.sub.ci) from the value vector obtained by calculation from the crystal structure parameter, a weight matrix W is obtained from device function matrix, systematic error, and accidental error, and the calculated value vector F.sub.c is determined so that a residual square sum s (=(F-F.sub.c).sup.t W(F-F.sub.c)) obtained by multiplying a difference between F and F.sub.Type: GrantFiled: March 7, 1997Date of Patent: June 27, 2000Assignee: Mitsubishi Heavy Industries, Ltd.Inventors: Ichiro Nagano, Yuichiro Murakami