Patents by Inventor Shoju Masaki
Shoju Masaki 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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Patent number: 9499886Abstract: A Ni-based single crystal superalloy which has the following composition: Co: 4.0 to 9.5 wt %, Cr: 5.1 to 8.0 wt %, Mo: 2.1 to 3.5 wt %, W: 0.0 to 2.9 wt %, Ta: 4.0 to 10.0 wt %, Al: 4.5 to 6.5 wt %, Ti: 0.0 to 1.0 wt %, Hf: 0.08 to 0.5 wt %, Nb: 0.0 to 3.0 wt %, Re: 4.5 to 8.0 wt % and Ru: 0.5 to 6.5 wt % with the remainder including Ni and unavoidable impurities, wherein P1?700 is satisfied in which P1 represents a parameter 1, which is obtained by a formula: P1=137×[W (wt %)]+24×[Cr (wt %)]+46×[Mo (wt %)]?18×[Re (wt %)].Type: GrantFiled: June 18, 2015Date of Patent: November 22, 2016Assignee: IHI CORPORATIONInventors: Akihiro Sato, Kazuyoshi Chikugo, Yasuhiro Aoki, Nobuhito Sekine, Mikiya Arai, Shoju Masaki
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Publication number: 20150292063Abstract: A Ni-based single crystal superalloy which has the following composition: Co: 4.0 to 9.5 wt %, Cr: 5.1 to 8.0 wt %, Mo: 2.1 to 3.5 wt %, W: 0.0 to 2.9 wt %, Ta: 4.0 to 10.0 wt %, Al: 4.5 to 6.5 wt %, Ti: 0.0 to 1.0 wt %, Hf: 0.08 to 0.5 wt %, Nb: 0.0 to 3.0 wt %, Re: 4.5 to 8.0 wt % and Ru: 0.5 to 6.5 wt % with the remainder including Ni and unavoidable impurities, wherein P1?700 is satisfied in which P1 represents a parameter 1, which is obtained by a formula: P1=137×[W(wt %)]+24×[Cr(wt %)]+46×[Mo(wt %)]?18×[Re(wt %)].Type: ApplicationFiled: June 18, 2015Publication date: October 15, 2015Inventors: Akihiro Sato, Kazuyoshi Chikugo, Yasuhiro Aoki, Nobuhito Sekine, Mikiya Arai, Shoju Masaki
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Patent number: 8968643Abstract: The object of the present invention is to provide an Ni-based single crystal super alloy capable of improving strength by preventing precipitation of a TCP phase at high temperatures. This object is achieved by an Ni-based single crystal super alloy having a composition comprising 5.0-7.0 wt % of Al, 4.0-10.0 wt % of Ta, 1.1-4.5 wt % of Mo, 4.0-10.0 wt % of W, 3.1-8.0 wt % of Re, 0-0.50 wt % of Hf, 2.0-5.0 wt % of Cr, 0-9.9 wt % of Co and 4.1-14.0 wt % of Ru in terms of its weight ratio, with the remainder consisting of Ni and unavoidable impurities. Furthermore, in this Ni-based single crystal super alloy, when lattice constant of matrix is taken to be a1 and lattice constant of precipitation phase is taken to be a2, a2?0.999a1.Type: GrantFiled: October 8, 2010Date of Patent: March 3, 2015Assignees: National Institute for Materials Science, IHI CorporationInventors: Toshiharu Kobayashi, Yutaka Koizumi, Tadaharu Yokokawa, Hiroshi Harada, Yasuhiro Aoki, Mikiya Arai, Shoju Masaki
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Patent number: 8771440Abstract: A Ni-based single crystal superalloy according to the invention has, for example, a composition including: 5.0 to 7.0 wt % of Al, 4.0 to 10.0 wt % of Ta, 1.1 to 4.5 wt % of Mo, 4.0 to 10.0 wt % of W, 3.1 to 8.0 wt % of Re, 0.0 to 2.0 wt % of Hf, 2.5 to 8.5 wt % of Cr, 0.0 to 9.9 wt % of Co, 0.0 to 4.0 wt % of Nb, and 1.0 to 14.0 wt % of Ru in terms of weight ratio; and the remainder including Ni and incidental impurities. In addition, the contents of Cr, Hf and Al are preferably set so as to satisfy the equation OP?108. According to the Ni-based single crystal superalloy of the invention, high creep strength can be maintained and the oxidation resistance can be improved.Type: GrantFiled: September 12, 2007Date of Patent: July 8, 2014Assignees: National Institute for Materials Science, IHI CorporationInventors: Akihiro Sato, Hiroshi Harada, Kyoko Kawagishi, Toshiharu Kobayashi, Tadaharu Yokokawa, Yutaka Koizumi, Yasuhiro Aoki, Mikiya Arai, Kazuyoshi Chikugo, Shoju Masaki
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Patent number: 8330071Abstract: Generating pulsed discharge between an end surface of an electrode and an end face portion of a metallic plate, to attrite the electrode, to form in the end surface of the electrode a recess conforming to a shape of the end face portion of the metallic plate, having the electrode making a relative movement in a direction perpendicular to a lateral side of the metallic plate, generating pulsed discharge between an internal side face of the electrode recess and a lateral face of the end face portion of the metallic plate, to form an auxiliary coat on the lateral face of the end face portion of the metallic plate, and generating pulsed discharge between a bottom face of the electrode recess and a top face of the end face portion of the metallic plate, to form a cladding layer on the end face portion of the metallic plate.Type: GrantFiled: March 26, 2008Date of Patent: December 11, 2012Assignee: IHI CorporationInventors: Masayoshi Shiino, Hiroyuki Ochiai, Shoju Masaki, Mitsutoshi Watanabe, Yukihiro Shimoda
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Publication number: 20110171057Abstract: The object of the present invention is to provide an Ni-based single crystal super alloy capable of improving strength by preventing precipitation of a TCP phase at high temperatures. This object is achieved by an Ni-based single crystal super alloy having a composition comprising 5.0-7.0 wt % of Al, 4.0-10.0 wt % of Ta, 1.1-4.5 wt % of Mo, 4.0-10.0 wt % of W, 3.1-8.0 wt % of Re, 0-0.50 wt % of Hf, 2.0-5.0 wt % of Cr, 0-9.9 wt % of Co and 4.1-14.0 wt % of Ru in terms of its weight ratio, with the remainder consisting of Ni and unavoidable impurities. Furthermore, in this Ni-based single crystal super alloy, when lattice constant of matrix is taken to be a1 and lattice constant of precipitation phase is taken to be a2, a2?0.999a1.Type: ApplicationFiled: October 8, 2010Publication date: July 14, 2011Inventors: Toshiharu KOBAYASHI, Yutaka KOIZUMI, Tadaharu YOKOKAWA, Hiroshi HARADA, Yasuhiro AOKI, Mikiya ARAI, Shoju MASAKI
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Publication number: 20100143182Abstract: A Ni-based single crystal superalloy according to the invention has, for example, a composition including: 5.0 to 7.0 wt % of Al, 4.0 to 10.0 wt % of Ta, 1.1 to 4.5 wt % of Mo, 4.0 to 10.0 wt % of W, 3.1 to 8.0 wt % of Re, 0.0 to 2.0 wt % of Hf, 2.5 to 8.5 wt % of Cr, 0.0 to 9.9 wt % of Co, 0.0 to 4.0 wt % of Nb, and 1.0 to 14.0 wt % of Ru in terms of weight ratio; and the remainder including Ni and incidental impurities. In addition, the contents of Cr, Hf and Al are preferably set so as to satisfy the equation OP?108. According to the Ni-based single crystal superalloy of the invention, high creep strength can be maintained and the oxidation resistance can be improved.Type: ApplicationFiled: September 12, 2007Publication date: June 10, 2010Inventors: Akihiro Sato, Hiroshi Harada, Kyoko Kawagishi, Toshiharu Kobayashi, Tadaharu Yokokawa, Yutaka Koizumi, Yasuhiro Aoki, Mikiya Arai, Kazuyoshi Chikugo, Shoju Masaki
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Publication number: 20100126871Abstract: Generating pulsed discharge between an end surface of an electrode 37 and an end face portion of a metallic plate 11, to attrite the electrode 37, to form in the end surface of the electrode 37 a recess 41 conforming to a shape of the end face portion of the metallic plate 11, having the electrode 37 making a relative movement in a direction perpendicular to a lateral side of the metallic plate 11, generating pulsed discharge between an internal side face of the recess 41 of the electrode 37 and a lateral face 11bl (11cl) or 11br (11cr) of the end face portion of the metallic plate 11, to form an auxiliary coat 43 or 45 on the lateral face 11bl (11cl) or 11br (11cr) of the end face portion of the metallic plate 11, and generating pulsed discharge between a bottom face of the recess 41 of the electrode 37 and a top face 11bu (11cu) of the end face portion of the metallic plate 11, to form a cladding layer 47 on the end face portion of the metallic plate 11.Type: ApplicationFiled: March 26, 2008Publication date: May 27, 2010Applicant: IHI CorporationInventors: Masayoshi Shiino, Hiroyuki Ochiai, Shoju Masaki, Mitsutoshi Watanabe, Yukihiro Shimoda
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Publication number: 20100092302Abstract: A Ni-based single crystal superalloy which has the following composition: Co: 0.0 wt % or more to 15.0 wt % or less, Cr: 4.1 to 8.0 wt %, Mo: 2.1 to 6.5 wt %, W: 0.0 to 3.9 wt %, Ta: 4.0 to 10.0 wt %, Al: 4.5 to 6.5 wt %, Ti: 0.0 to 1.0 wt %, Hf: 0.00 to 0.5 wt %, Nb: 0.0 to 3.0 wt %, Re: 3.0 to 8.0 wt % and Ru: 0.5 to 6.5 wt % with the remainder including Ni and unavoidable impurities, wherein P1?700 is satisfied in which P1 represents a parameter 1, which is obtained by a formula: P1=137×[W (wt %)]+24×[Cr (wt %)]+46×[Mo (wt %)]?18×[Re (wt %)]. The Ni-based single crystal superalloy has excellent specific creep strength.Type: ApplicationFiled: March 11, 2008Publication date: April 15, 2010Inventors: Akihiro Sato, Kazuyoshi Chikugo, Yasuhiro Aoki, Nobuhito Sekine, Mikiya Arai, Shoju Masaki
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Patent number: 6966956Abstract: A Ni-based single crystal super alloy capable of improving strength by preventing precipitation of a TCP phase at high temperatures may be obtained by a Ni-based single crystal super alloy having a composition consisting of 5.0-7.0 wt % Al, 4.0-8.0 wt % Ta, 2.9-4.5 wt % Mo, 4.0-8.0 wt % W, 3.0-6.0 wt % Re, 0.01-0.50 wt % Hf, 2.0-5.0 wt % Cr, 0.1-15.0 wt % Co and 1.0-4.0 wt % Ru in terms of its weight ratio, with the remainder consisting of Ni and unavoidable impurities. Preferably, the composition of Co in the Ni-based single crystal super alloy is limited to 0.1-9.5 wt %.Type: GrantFiled: July 26, 2004Date of Patent: November 22, 2005Assignees: National Institute for Materials Science, Ishikawajima-Harima Heavy Industries Co., Ltd.Inventors: Yutaka Koizumi, Toshiharu Kobayashi, Tadaharu Yokokawa, Hiroshi Harada, Yasuhiro Aoki, Mikiya Arai, Shoju Masaki, Ryoji Kakiuchi, Kazuyoshi Chikugo
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Publication number: 20050051242Abstract: A Ni-based single crystal super alloy capable of improving strength by preventing precipitation of a TCP phase at high temperatures may be obtained by a Ni-based single crystal super alloy having a composition consisting of 5.0-7.0 wt % Al, 4.0-8.0 wt % Ta, 2.9-4.5 wt % Mo, 4.0-8.0 wt % W, 3.0-6.0 wt % Re, 0.01-0.50 wt % Hf, 2.0-5.0 wt % Cr, 0.1-15.0 wt % Co and 1.0-4.0 wt % Ru in terms of its weight ratio, with the remainder consisting of Ni and unavoidable impurities. Preferably, the composition of Co in the Ni-based single crystal super alloy is limited to 0.1-9.5 wt %.Type: ApplicationFiled: July 26, 2004Publication date: March 10, 2005Inventors: Yutaka Koizumi, Toshiharu Kobayashi, Tadaharu Yokokawa, Hiroshi Harada, Yasuhiro Aoki, Mikiya Arai, Shoju Masaki, Ryoji Kakiuchi, Kazuyoshi Chikugo
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Publication number: 20030108424Abstract: There is disclosed a turbine blade comprising a turbine blade main body 10 with a blade-shaped section and a thermal barrier coat 20 as an insulating layer. The turbine blade main body 10 includes an internal air gap 12 disposed inside so that a coolant gas passes and a plurality of coolant gas ports 13 connected to the internal air gap and disposed in the outer peripheral surface. The thermal barrier coat 20 is coated with the outer peripheral surface of the turbine blade main body. The thermal barrier coat fills in at least some of the coolant gas ports. Thereby, a temperature of a high-temperature gas is raised and the turbine blade can be run.Type: ApplicationFiled: May 17, 2002Publication date: June 12, 2003Applicant: Ishikawajima-Harima HeavyInventor: Shoju Masaki
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Publication number: 20030075247Abstract: The object of the present invention is to provide an Ni-based single crystal super alloy capable of improving strength by preventing precipitation of a TCP phase at high temperatures. This object is achieved by an Ni-based single crystal super alloy having a composition consisting of 5.0-7.0 wt % Al, 4.0-8.0 wt % Ta, 2.9-4.5 wt % Mo, 4.0-8.0 wt % W, 3.0-6.0 wt % Re, 0.01-0.50 wt % Hf, 2.0-5.0 wt % Cr, 0.1-15.0 wt % Co and 1.0-4.0 wt % Ru in terms of its weight ratio, with the remainder consisting of Ni and unavoidable impurities.Type: ApplicationFiled: May 30, 2002Publication date: April 24, 2003Inventors: Yutaka Koizumi, Toshiharu Kobayashi, Tadaharu Yokokawa, Hiroshi Harada, Yasuhiro Aoki, Mikiya Arai, Shoju Masaki, Ryoji Kakiuchi, Kazuyoshi Chikugo
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Patent number: 6368663Abstract: There is disclosed a hybrid treatment into which CVI treatment and PIP treatment are combined. A dense matrix is formed around a ceramic fiber by the CVI treatment, and a gap in the matrix is infiltrated/filled well with the matrix by the PIP treatment, so that hermetic properties are enhanced. Moreover, when a volume ratio of the matrix by the CVI treatment in the total matrix is set to about 5% or more, about 80% or less, fine cracks are present in the matrix by the PIP treatment, so that a binding force of the ceramic fiber is weakened, and Young's modulus can be reduced. As a result, a thermal stress is alleviated and a resistance to thermal shock is enhanced.Type: GrantFiled: June 29, 1999Date of Patent: April 9, 2002Assignee: Ishikawajima-Harima Heavy Industries Co., LtdInventors: Takeshi Nakamura, Hiroshige Murata, Shoju Masaki
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Patent number: 5879803Abstract: There is provided Ceramic matrix composites comprising fibers, BN coating applied to the fibers, the BN coating being composed of BN and one of Y.sub.2 O.sub.3, Sc.sub.2 O.sub.3, ZrO.sub.2 and lanthanoid family oxide or combinations thereof, and matrices interposed between the fibers. There is also provided Ceramic matrix composites comprising, fibers, BN coating applied to the fibers, the BN coating is composed of BN and coated with one of Y.sub.2 O.sub.3, Sc.sub.2 O.sub.3, ZrO.sub.2 and lanthanoid family oxide or combinations thereof, and matrices interposed between the fibers. The ceramic matrix composites in accordance with the present invention is capable of being used at 1000 degrees centigrade or greater in air.Type: GrantFiled: June 27, 1997Date of Patent: March 9, 1999Assignee: Ishikawajima-Harima Heavy Industries Co., Ltd.Inventors: Shoju Masaki, Takeshi Nakamura, Kaoru Miyahara, Hiroshige Murata