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公开(公告)号：JPH0455364A
公开(公告)日：1992-02-24
申请号：JP16421090
申请日：1990-06-25
Applicant: TOSHIBA CORP
Inventor： SUZUKI TAKAO , ITO MASAYUKI , NAKABASHI MASAKO
Abstract: PURPOSE:To heat-treat only a part requiring heat treatment in a short time and to obtain a zirconia-based sintered body having superior mechanical strength by irradiating a molded body or a coating layer of zirconia-based powder with laser beams. CONSTITUTION:A mold body or a coating layer of zirconia-based powder is irradiated with laser beams and a zirconia-based sintered body contg. >=5 vol.% at least one of cubic and tetragonal phases as crystal phases is obtd. CO2, YAG or He-Ne laser beams may be used as the laser beams but CO2 laser beams powerful as a heating source are especially effective. Any of single and multiple modes may be used as the beam mode and an oscillation beaming method or a linear beaming method enabling relatively easy rapid heating in a short time is especially effective as the beaming method.
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公开(公告)号：JPH03183754A
公开(公告)日：1991-08-09
申请号：JP16271690
申请日：1990-06-22
Applicant: TOSHIBA CORP
Inventor： ITO MASAYUKI , SUZUKI TAKAO , OKUDE SHINICHIRO , NAKABASHI MASAKO , TAKEDA HIROMITSU
Abstract: PURPOSE:To obtain high strength at high temp. and to stably use a composite over a long period by providing refractory metal fiber coated with Nb layer and Nb-Al alloy layer into a matrix composed of super alloy of Fe base, Ni base, etc. CONSTITUTION:A beat resisting composite is formed by providing refractory metal fiber into a matrix composed of Fe-base, Ni-base, or Co-base super alloy. Refractory metal fiber composed of tungsten alloy, etc., and coated with Nb layer consisting of Nb or Nb alloy and further coated with Nb-Al alloy layer on the above Nb layer are used as the above refractory metal fiber. In this heat resisting composite, thermal deformation can be prevented even if repeated thermal load between high temp. and ordinary temp. is applied. Since the surface of the Nb layer is coated with the Nb-Al alloy layer, mutual diffusion between the super alloy as matrix and the refractory metal fiber at high temp. can be prevented and, as a result, deterioration in a reinforcement consisting of the above refractory metal fiber can be prevented.
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公开(公告)号：JPH03183538A
公开(公告)日：1991-08-09
申请号：JP15980190
申请日：1990-06-20
Applicant: TOSHIBA CORP
Inventor： ITO MASAYUKI , SUZUKI TAKAO , NAKABASHI MASAKO , TAKEDA HIROMITSU , OKUDE SHINICHIRO
Abstract: PURPOSE:To enable sufficient strength to be obtained even when subjected to high temperature and also enable it to be used stably for a long period by making fire-proof metallic fibers disposed in a basic body comprising a super alloy of a nickel or a cobalt have a specific coated layer of a niobium or a niobic alloy. CONSTITUTION:The title compound has a two layered construction of basic bodies 6 consisting of a nickel or a cobalt, fireproof metallic fibers 3 disposed within the basic bodies and niobic layers 4 consisting of niobium or niobic alloy, and hard metallic layers 5 comprising the hard metal of an iron group covering the niobic layers, and is equipped with coating layers coating the fireproof metallic fibers. As fire-proof metallic fibers, it is preferred to employ W wire, Mo wire and Ta wire, and W wire containing at least a kind of ThO2, K, Si and Al. A fireproof composite serves to cover the surface of the fireproof metallic fibers 3 disposed within the basic bodies 6 comprising a hard metal of an Ni or a Co with super alloy layers comprising the niobic layers 4 and iron-based super alloy 5 and also serves to prevent various elements from dispersing from the super alloy of the Ni or Co as a matrix 6 to the fire-proof metallic fibers.
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公开(公告)号：JPH03112061A
公开(公告)日：1991-05-13
申请号：JP24931289
申请日：1989-09-27
Applicant: TOSHIBA CORP
Inventor： TATEISHI HIROSHI , IMAI KIYOSHI , ITO MASAYUKI
IPC: H01M8/02
Abstract: PURPOSE:To increase gas sealing capability and corrosion resistance in an edge sealing part by employing a stainless steel edge sealing plate on which a corrosion resistant treatment layer comprising iron-aluminium intermetallic compound is formed. CONSTITUTION:A gas supply cover 12 with an edge sealing plate 13 is installed on an electrolyte plate 11 to which a stainless steel lower plate 15 is closely attached to form a gas filling part 18. The edge sealing plate 13 made of stainless steel is held in an aluminium chloride gas at high temperature to form a corrosion resistant treatment layer comprising iron-aluminium intermetallic compound on the surface of the edge sealing plate 13. By the use of this plate 13, gas sealing capability and corrosion resistance in the edge sealing part are increased.
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公开(公告)号：JPH02125853A
公开(公告)日：1990-05-14
申请号：JP27892988
申请日：1988-11-04
Applicant: TOSHIBA CORP
Inventor： NAKABASHI MASAKO , SUZUKI TAKAO , ITO MASAYUKI , TAKEDA HIROMITSU
Abstract: PURPOSE:To easily and uniformly form a coating layer of refractory metal on the surfaces of W fibers by exposing W fibers to a molten Cu alloy containing retractory metal to deposit the refractory metal on the surfaces of the W fibers and then removing the Cu alloy and the undeposited refractory metal. CONSTITUTION:W fibers are exposed to a molten Cu alloy containing refractory metal, such as Nb and Ta, to coagulate and deposit the refractory metal on the surfaces of the W fibers. After cooling, the Cu alloy and the undeposited refractory metal are removed from the W fibers by using nitric acid, etc., by which the W fibers whose surfaces are covered with the coating layer of the refractory metal, respectively, are obtained. By embedding the above W fibers into a base material composed of super alloy, a W fiber-reinforced supper alloy body can be formed.
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Patent Agency Ranking
公开(公告)号：JPH01252740A
公开(公告)日：1989-10-09
申请号：JP7624288
申请日：1988-03-31
Applicant: TOSHIBA CORP
Inventor： ITO MASAYUKI , SUZUKI TAKAO , NAKABASHI MASAKO , TAKEDA HIROMITSU
Abstract: PURPOSE:To prevent the mutual diffusion between the refractory-metal fiber and a super alloy at high temp. and to obtain a heat-resisting composite body having sufficient strength at high temp. by coating a reinforcement to be provided into an Fe-base alloy body and consisting of refractory-metal fiber with a protective film consisting of non-oxide ceramics. CONSTITUTION:A reinforcement consisting of refractory-metal fiber is coated with a protective film consisting of non-oxide ceramics. By coating the above protective film with a matrix of super alloy consisting of Fe super alloy by means of plasma spraying in low-pressure atmosphere, the reinforcement can be easily buried in the super alloy matrix without exposing the refractory-metal fiber to high temp. Further, the mutual diffusion between the refractory-metal fiber and the super alloy at high temp. is prevented in the resulting composite body because of the coating with the protective film of non-oxide ceramics and, as a result, sufficient strength at high temp. can be provided.
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公开(公告)号：JPH01241389A
公开(公告)日：1989-09-26
申请号：JP6815388
申请日：1988-03-24
Applicant: TOSHIBA CORP
Inventor： SUZUKI TAKAO , ITO MASAYUKI , NAKABASHI MASAKO , TAKEDA HIROMITSU
IPC: B23K26/352 , B23K26/21 , C04B37/00 , C04B41/91
Abstract: PURPOSE:To increase energy absorptivity and to improve laser beam machining efficiency by heat-treating and coloring and then, machining ceramics at the time of cutting, welding and machining such as surface modification of the ceramics by laser beam irradiation. CONSTITUTION:At the time of coloring up to the relatively inside of material by an oxide, the ceramics are subjected to heat treatment in a reducing atmosphere and colored. In addition, in machining such as surface modification by a laser beam to melt and solidify a relatively surface layer of the material by laser beam irradiation, the high energy laser beam is projected on the ceramics to color it. By this method, the absorptivity can be increased on the laser beam energy.
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公开(公告)号：JPH01177326A
公开(公告)日：1989-07-13
申请号：JP73488
申请日：1988-01-07
Applicant: TOSHIBA CORP
Inventor： ITO MASAYUKI , SUZUKI TAKAO , NAKABASHI MASAKO , TAKEDA HIROMITSU
Abstract: PURPOSE:To prevent mutual diffusion at high temp. and to enable stable use over a long period by burying a refractory-metal fiber consisting of an Nb- coated W wire in which Pe is added in a super heat-resisting alloy. CONSTITUTION:A heat-resisting composite material is formed by providing a structure in which a Pe-added W wire whose surface is coated with Nb is buried in a super heat-resisting alloy. As the super heat-resisting alloy, a Co-base alloy having a composition consisting of, by weight ratio, 10-35% Cr, 5-20% Al, 0.3-1.5% Y, 0-20% Ni, 0-30% Fe, and the balance Co or other Ni-base or Fe-base heat-resisting alloys can be used. By this method, a heat-resisting composite material reduced in deterioration in strength at >=about 1,100 deg.C and excellent in high-temp. characteristics can be formed. Sine deformation due to repeated thermal load can be prevented in this material, this material is suitably used as a material for large-sized energy conversion equipment such as gas turbine.
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公开(公告)号：JPS647482A
公开(公告)日：1989-01-11
申请号：JP16310487
申请日：1987-06-30
Applicant: TOSHIBA CORP
Inventor： TAKEDA HIROMITSU , ITO MASAYUKI , TAKAHASHI YOSHIKAZU , YOSHINO HISASHI
Abstract: PURPOSE:To facilitate connecting work by attaching end surfaces of a composite oxide superconductor through mixed powder of oxide superconductor powder and normal conductor powder, heating them at the fusing point temperature or higher of either of the powders of the oxide superconductor and normal conductor, and cooling the connected part while giving a temperature gradient in one direction. CONSTITUTION:End surfaces of a composite oxide superconductor are attached to each other through mixed powder of oxide superconductor powder and normal conductor powder and heat-treated. This makes positioning easy at the time of connecting, and it becomes possible to perform connection of a normal conductor and an oxide superconductor in the composite oxide superconductor at the same time. In addition, since they are cooled to be hardened while a temperature gradient is applied in one direction, crystals of the oxide superconductor grow like fibers in the connecting direction at the connecting part, so connection can be preformed preferably without deteriorating characteristics of the oxide superconductor.
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公开(公告)号：JPS647415A
公开(公告)日：1989-01-11
申请号：JP16311987
申请日：1987-06-30
Applicant: TOSHIBA CORP
Inventor： SHIROKANE MAKOTO , SUZUKI TAKAO , ITO MASAYUKI , NIBU HIROMI
Abstract: PURPOSE:To provide a superconductive wire of oxide type in multi-layer structure easily by forming superconductor layers of oxide type and normal electroconductive layers alternately by thermal spraying over the outer surface of a base consisting of normal electroconductive substance. CONSTITUTION:Superconductor layer 2a of oxide type is formed by thermal spraying over the surface of a base 1 in the form of a tubing made of normally electroconductive material. At this normally electroconductive material used to the base 1 can be named Cu, Ag, Nb, Pd, and stainless steel. For thermal spraying can be adopted such ordinary methods as gas thermal spraying process, plasma spraying process, etc., among which low pressure atmosphere plasma spraying method may be preferred. A normally electroconductive layer 3a is formed by a similar spraying method on the surface of superconductor layer 2a of oxide type. Provision of superconductor layers of oxide type 2a and normally electroconductive layers 3a is repeated more than one cycle. Thus a superconductive wire of oxide type in multi-layer structure is accomplished, in which superconductor layers 2a of oxide type and normally electroconductive layers 3a are laid alternately.
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