Abstract: To provide a new tungsten-based thermal spray coating suitable as e.g. a component for plasma etching device using halogen gas, and a material for thermal spraying for obtaining the thermal spray coating. A thermal spray coating characterized by containing tungsten as a matrix phase and oxides containing silicon and boron as a dispersed phase, and a component for plasma etching device having such a thermal spray coating. A material for thermal spraying characterized by containing from 1 to 7 wt % of silicon, from 0.5 to 3 wt % of boron and the reminder being tungsten and unavoidable impurities, and a method for producing a thermal spray coating by thermally spraying the material for thermal spraying.

Abstract: To form, on a ceramic member or a metal member, a thermal spray ceramic coating film which achieves both the quality of a ceramic coating film and gas barrier property, and with which a composite oxide having a melting point lower than the ambient temperature will not form when used as a coating film on a ceramic member or a metal member constituting a glass article manufacturing apparatus. A ceramic coating film-provided member comprising a ceramic member or a metal member and a thermal spray ceramic coating film formed on at least a part of the surface of the ceramic member or the metal member, wherein the thermal spray ceramic coating film contains Al2O3 and 12CaO.7Al2O3, and the weight ratio of CaO to Al2O3 (CaO/Al2O3) is more than 0.11 to 0.50.

Abstract: To provide a method for forming a thermal spray coating film, by forming a thermal spray coating film of an Al—Fe based intermetallic compound having a high hardness, on a metal substrate. A method for forming a thermal spray coating film, by forming a thermal spray coating film of an Al—Fe based intermetallic compound, from a mixture of an Al—Fe based intermetallic compound powder composed mainly of FeAl2 and a metal powder composed mainly of Fe, as feedstock, on the surface of a metal substrate.

Abstract: To form, on a ceramic member or a metal member, a thermal spray ceramic coating film which achieves both the quality of a ceramic coating film and gas barrier property, and with which a composite oxide having a melting point lower than the ambient temperature will not form when used as a coating film on a ceramic member or a metal member constituting a glass article manufacturing apparatus. A ceramic coating film-provided member comprising a ceramic member or a metal member and a thermal spray ceramic coating film formed on at least a part of the surface of the ceramic member or the metal member, wherein the thermal spray ceramic coating film contains Al2O3 and 12CaO.7Al2O3, and the weight ratio of CaO to Al2O3 (CaO/Al2O3) is more than 0.11 to 0.50.

Abstract: The present invention provides a metal member that is used so that there is a portion that is exposed to the atmosphere in a float bath, and with which diffusion of Fe into the float bath is inhibited and thereby preventing the defect from being generated on the surface of a plate glass. The present invention relates to a metal member with a film for a float glass manufacturing equipment that has a portion exposed to the atmosphere in a float bath in which the film has a mean thickness of from 50 to 500 ?m and contains Ni and/or Co, Cr and Al2O3 as main components; the Al2O3 content in the film is from 5 to 40% by volume; the Al2O3 is present in a thin film state in the surface direction of the metal member, inside the film; and the metal member contains Fe in an amount of from 40 to 98% by mass and has the film on the exposed portions.

Abstract: The present invention provides a new method for airtightly joining a hollow tube made of a reinforced platinum and a flange made of platinum or a platinum alloy, which prevents decreasing of mechanical strength of the hollow tube made of a reinforced platinum due to its joining with a flange. A method for airtightly joining a hollow tube made of a reinforced platinum with a flange made of platinum or a platinum alloy, which is a method for airtightly joining the outer periphery of a hollow tube made of a reinforced platinum produced by dispersing metal oxides in platinum or a platinum alloy, with a flange made of platinum or a platinum alloy, the method comprising a step of shrink-fitting a ring made of platinum or a platinum alloy to the outer periphery of the hollow tube, a step of heating the hollow tube to which the ring is shrink-fit at from 1,150 to 1,450° C. for from 1 to 10 hours, and a step of welding the flange made of platinum or a platinum alloy to the outer periphery of the ring.

Abstract: The present invention provides a new method for airtightly joining a hollow tube made of a reinforced platinum and a flange made of platinum or a platinum alloy, which prevents decreasing of mechanical strength of the hollow tube made of a reinforced platinum due to its joining with a flange. A method for airtightly joining a hollow tube made of a reinforced platinum with a flange made of platinum or a platinum alloy, which is a method for airtightly joining the outer periphery of a hollow tube made of a reinforced platinum produced by dispersing metal oxides in platinum or a platinum alloy, with a flange made of platinum or a platinum alloy, the method comprising a step of shrink-fitting a ring made of platinum or a platinum alloy to the outer periphery of the hollow tube, a step of heating the hollow tube to which the ring is shrink-fit at from 1,150 to 1,450° C. for from 1 to 10 hours, and a step of welding the flange made of platinum or a platinum alloy to the outer periphery of the ring.

Abstract: The present invention provides a new method for airtightly joining a hollow tube made of a reinforced platinum and a flange made of platinum or a platinum alloy, which prevents decreasing of mechanical strength of the hollow tube made of a reinforced platinum due to its joining with a flange. A method for airtightly joining a hollow tube made of a reinforced platinum with a flange made of platinum or a platinum alloy, which is a method for airtightly joining the outer periphery of a hollow tube made of a reinforced platinum produced by dispersing metal oxides in platinum or a platinum alloy, with a flange made of platinum or a platinum alloy, the method comprising a step of shrink-fitting a ring made of platinum or a platinum alloy to the outer periphery of the hollow tube, a step of heating the hollow tube to which the ring is shrink-fit at from 1,150 to 1,450° C. for from 1 to 10 hours, and a step of welding the flange made of platinum or a platinum alloy to the outer periphery of the ring.

Abstract: The present invention provides a A metal conduit for molten glass and a vacuum degassing apparatus are disclosed, which are capable of coping with extension and contraction, and vibration. By disposing at least one convex portion 20 so to have a height of 4 mm or above in a radial direction and continuously extend in a peripheral direction, it is possible to absorb thermal expansion and contraction without changing the entire length of the metal conduit 10 and to suppress from the metal conduit 10 from vibrated even when molten glass 121 is conveyed by the metal conduit. By employing the metal conduit 10 stated earlier in an upstream conveying pipe 130A, an uprising pipe 122U, a vacuum degassing vessel 120, a downfalling pipe 122L, a downstream conveying pipe 130B or the like in a vacuum degassing apparatus 30, it is possible to cope with thermal expansion and contraction, and vibration caused when conveying molten glass 121.

Abstract: A conduit for molten glass, a molten glass degassing method and a sub-atmospheric apparatus are provided, which are able to produce homogenous and good quality glass at low cost. A conduit for molten glass, which is capable of flowing molten glass in a horizontal direction, and to which vertical pipes are connectable, is disposed in a substantially horizontal direction. The conduit for molten glass can increase the area of a free surface of the molten glass by setting a width W at a larger value than a height H in cross-section and having an outline in cross-section comprising a convex curve. When the conduit for molten glass thus configured is used as a sub-atmospheric apparatus, it is possible to degas the molten glass effectively. Additionally, it is possible to have a sufficient strength since the convex curve forming the cross-section is elliptical. Further, it is possible to reduce costs by decreasing the amount of metal required for forming the cross-section.

Abstract: The present invention provides a platinum or a platinum alloy structure suitable as a conduit tube for molten glass, and a molten-glass-producing apparatus employing the structure as a conduit tube for molten glass. A platinum or platinum alloy structure to be used under high-temperature environment, comprising a hollow tube body and a flange provided on the outer periphery of the hollow tube body so as to extend radially therefrom, wherein the flange is provided with a stress-strain-absorbing structure.

Abstract: The present invention provides a new method for airtightly joining a hollow tube made of a reinforced platinum and a flange made of platinum or a platinum alloy, which prevents decreasing of mechanical strength of the hollow tube made of a reinforced platinum due to its joining with a flange. A method for airtightly joining a hollow tube made of a reinforced platinum with a flange made of platinum or a platinum alloy, which is a method for airtightly joining the outer periphery of a hollow tube made of a reinforced platinum produced by dispersing metal oxides in platinum or a platinum alloy, with a flange made of platinum or a platinum alloy, the method comprising a step of shrink-fitting a ring made of platinum or a platinum alloy to the outer periphery of the hollow tube, a step of heating the hollow tube to which the ring is shrink-fit at from 1,150 to 1,450° C. for from 1 to 10 hours, and a step of welding the flange made of platinum or a platinum alloy to the outer periphery of the ring.

Abstract: The present invention provides a metal conduit for molten glass and a vacuum degassing apparatus, which are capable of coping with extension and contraction, and vibration. By disposing at least one concave portion 20 so to have a height of 4 mm or above in a radial direction and continuously extend in a peripheral direction, it is possible to absorb thermal expansion and contraction without changing the entire length of the metal conduit 10 and to suppress from the metal conduit 10 from vibrated even when molten glass 121 is conveyed by the metal conduit. By employing the metal conduit 10 stated earlier in an upstream conveying pipe 130A, an uprising pipe 122U, a vacuum degassing vessel 120, a downfalling pipe 122L, a downstream conveying pipe 130B or the like in a vacuum degassing apparatus 30, it is possible to cope with thermal expansion and contraction, and vibration caused when conveying molten glass 121.

Abstract: A conduit for molten glass, a molten glass degassing method and a sub-atmospheric apparatus are provided, which are able to produce homogenous and good quality glass at low cost. A conduit for molten glass 20, which is capable of flowing molten glass 21 in a horizontal direction, and to which vertical pipes 22 are connectable, is disposed in a substantially horizontal direction. The conduit for molten glass 20 can increase the area of a free surface 26 of the molten glass by setting a width W at a larger value than a height H in cross-section and having an outline in cross-section comprising a convex curve. When the conduit for molten glass 20 thus configured is used as a sub-atmospheric apparatus 10, it is possible to degas the molten glass effectively. Additionally, it is possible to have a sufficient strength since the convex curve forming the cross-section is elliptical. Further, it is possible to reduce costs by decreasing the amount of metal required for forming the cross-section.

Abstract: The injection sleeve comprises: a cylindrical cermet sintered body comprising a hard ceramic phase whose major components are at least one selected from the group consisting of a complex boride of Ni and Mo, a complex boride of Ni and W and a complex boride of Ni, Mo and W and a metal matrix phase consisting of a solid solution whose major components are Ni and Mo. The cylindrical cermet sintered body contains the hard ceramic phase in an amount of not less than 50% by weight and not more than 90% by weight.

Abstract: A complex boride cermet having high strength and high toughness, which comprises a hard phase composed mainly of a boride of (Mo.sub.1-x W.sub.x).sub.2 NiB.sub.2 formed by substituting a part of Mo of Mo.sub.2 NiB.sub.2 by W, and a matrix alloy phase composed mainly of Ni and containing Mo, and a complex boride cermet comprising a hard phase composed mainly of Mo.sub.2 NiB.sub.2 or (Mo.sub.1-x W.sub.x).sub.2 NiB.sub.2 and a matrix of an alloy phase composed mainly of Ni and containing Mo, which is characterized in that carbon or/and nitrogen, and optionally at least one metal selected from the metals of Groups 4B and 5B and Cr, are incorporated to further improve the strength and toughness. Such complex boride cermet has high strength and high toughness and maintains such properties even at elevated temperatures of from 600.degree. to 900.degree. C.

Abstract: A ZrB.sub.2 -containing sintered cermet comprising zirconium diboride partially substituted by at least one member selected from the group consisting of chromium boride, molybdenum boride and tungsten boride, and a binding component containing at least one member selected from the group consisting of metals of Group VIII of the periodic table.