Abstract: A ceramic coating according to at least one embodiment of the present disclosure includes: a bond coat layer formed on a substrate; and a ceramic layer formed on the bond coat layer. The ceramic layer has a first region in contact with an interface between the ceramic layer and the bond coat layer and a second region father away from the interface than the first region from the interface. In a cross-section along a thickness direction of the ceramic layer, the number of crack intersection points at which two or more cracks intersect per unit area in the ceramic layer is larger in the first region than in the second region.

Abstract: A turbine rotor blade includes a blade body and a tip shroud on a tip of the blade body. The tip shroud has a contact block configured to face a tip shroud of an adjacent turbine rotor blade, and the contact block includes a base material, an oxidation resistant coating on the surface of the base material, and a hard wear resistant coating on the surface of the oxidation resistant coating.

Abstract: A thermal barrier coating includes a bond coat layer deposited on a substrate, and a ceramic layer deposited on the bond coat layer. The ceramic layer includes a first layer having a porosity of 10% or more and 15% or less, and a second layer having a porosity of 0.5% or more and 9.0% or less and deposited on the first layer.

Abstract: The present invention provides a thermal barrier coated component, monitoring or evaluation of the soundness of which is able to be adequately carried out on the basis of the thermal boundary conditions that are detected by a sensor. A thermal barrier coated component according to the present invention comprises: a base material; a first bond coat layer that is a metal bonding layer formed on the base material; a sensor unit that comprises a sensor and a conductive wire, which are formed on the first bond coat layer; a second bond coat layer that is formed on the first bond coat layer so as to cover at least the sensor unit, while having a surface roughness higher than that of the first bond coat layer; and a top coat layer that is formed on the second bond coat layer.

Abstract: A ceramic coating according to at least one embodiment of the present disclosure includes: a bond coat layer formed on a substrate; and a ceramic layer formed on the bond coat layer. The ceramic layer has a first region in contact with an interface between the ceramic layer and the bond coat layer and a second region father away from the interface than the first region from the interface. In a cross-section along a thickness direction of the ceramic layer, the number of crack intersection points at which two or more cracks intersect per unit area in the ceramic layer is larger in the first region than in the second region.

Abstract: The present invention provides a thermal barrier coated component, monitoring or evaluation of the soundness of which is able to be adequately carried out on the basis of the thermal boundary conditions that are detected by a sensor. A thermal barrier coated component according to the present invention comprises: a base material; a first bond coat layer that is a metal bonding layer formed on the base material; a sensor unit that comprises a sensor and a conductive wire, which are formed on the first bond coat layer; a second bond coat layer that is formed on the first bond coat layer so as to cover at least the sensor unit, while having a surface roughness higher than that of the first bond coat layer; and a top coat layer that is formed on the second bond coat layer.

Abstract: A method of manufacturing a fabricated object includes forming the fabricated object by laminating metal powder, the fabricated object including an opening portion that communicates with a hollow internal space, mounting a plug in the opening portion, and welding the plug mounted in the opening portion to the fabricated object.

Abstract: An object of the present invention is to provide a turbine rotor blade or the like capable of improving the durability of a contact surface and the reliability of the blade. The turbine rotor blade includes a blade body and a tip shroud that is provided to a tip of the blade body. The tip shroud has a contact block facing an adjacent tip shroud, and the contact block includes a base material, an oxidation resistant coating laid on the surface of the base material, and a hard wear resistant coating that is laid on the surface of the oxidation resistant coating.

Abstract: A method of forming a sprayed coating includes preparing a spray target member having a surface on which openings of first ends of holes are formed, preparing a plurality of masking pins each of which comprises metal, and inserting each of the masking pins into a corresponding one of the holes so that each of the masking pins partially protrudes from the surface. The method also includes applying an adhesive agent for fixing the masking pins to the respective holes, to at least one of the holes or the masking pins, forming a ceramic layer by spraying on the surface of the spraying target member, the ceramic layer comprising a ceramic material, while the masking pins are fixed to the respective holes via the adhesive agent, and removing the masking pins from the holes after the spraying step.

Abstract: A method of manufacturing a fabricated object according to at least one embodiment includes a step of forming the fabricated object by laminating metal powder, the fabricated object including an opening portion that communicates with a hollow internal space, a step of mounting a plug in the opening portion, and a step of welding the plug mounted in the opening portion to the fabricated object.

Abstract: A unidirectionally solidified article repair method according to one embodiment includes a step of forming a groove part overlapping only on one of a plurality of crystal grain boundaries in a base material made of a unidirectionally solidified alloy in which the plurality of crystal grain boundaries are aligned in one direction, and a step of forming a welded part having a metal composition similar to that of the base material by a metal used in welding with the base material in the groove part.

Abstract: A ceramic matrix composite member including a ceramic matrix composite reinforced by ceramic fiber, includes a body portion and a joint portion joined integrally to the body portion, the joint portion occupying a part of a surface of the ceramic matrix composite member, wherein the body portion includes at least one hole extending toward an inside of the body portion from a boundary surface between the body portion and the joint portion, and the at least one hole is filled with a matrix of the ceramic matrix composite, wherein the body portion includes a first region where a density of the ceramic fiber is relatively high and a second region where the density of the ceramic fiber is lower than that in the first region, and wherein the at least one hole exists so as to cut off a part of bundles of the ceramic fiber in the second region.

Abstract: A method for repairing a target member including a ceramic matrix composite reinforced by ceramic fiber includes: a removal step of removing at least a part of a surface of the target member; an arrangement step of arranging a green body for repair which includes the ceramic fiber on a portion where the surface is removed in the removal step; an impregnation step of impregnating at least the portion of the target member where the green body for repair is disposed with slurry; and a sintering step of sintering the target member on which the green body for repair is disposed, after the impregnation step.

Abstract: The task is to provide a thermal barrier coating film (13) which exhibits high durability even in a gas turbine that is used under a molten salt environment, such as a heavy oil fired gas turbine, and which can be efficiently formed at low cost without requiring complicated processes, and a thermal barrier coating film (13) configures a turbine member includes a ceramic material thermally sprayed and formed on a base material (10) made of a heat resistant alloy, in which ytterbia partially stabilized zirconia is used as the ceramic material of the film (13), and the porosity of the film (13) is 5% or more and less than 8%.

Abstract: A thermal barrier coating film includes a bond coat layer that is a metallic bond layer formed on a base material; a topcoat layer that is a ceramic-containing layer formed on the bond coat layer; and at least one of a protective layer and a protective substance. The protective layer is formed on the topcoat layer and mainly contains SrSO4. The protective substance is provided in a plurality of void spaces included in the topcoat layer and mainly contains SrSO4.

Abstract: A thermal barrier coating includes a bond coat layer deposited on a substrate, and a ceramic layer deposited on the bond coat layer. The ceramic layer includes a first layer having a porosity of 10% or more and 15% or less, and a second layer having a porosity of 0.5% or more and 9.0% or less and deposited on the first layer.

Abstract: A thermal barrier coating includes a highly porous layer and a dense layer. The highly porous layer is formed on a heat-resistant base, is made of ceramic, has pores, has a layer thickness of equal to or larger than 0.3 mm and equal to or smaller than 1.0 mm, and has a pore ratio of equal to or higher than 1 vol % and equal to or lower than 30 vol %. The dense layer is formed on the highly porous layer, is made of ceramic, has a pore ratio of equal to or lower than 0.9 vol % that is equal to or lower than the pore ratio of the highly porous layer, and has a layer thickness of equal to or smaller than 0.05 mm.

Abstract: A unidirectionally solidified article repair method according to one embodiment includes a step of forming a groove part overlapping only on one of a plurality of crystal grain boundaries in a base material made of a unidirectionally solidified alloy in which the plurality of crystal grain boundaries are aligned in one direction, and a step of forming a welded part having a metal composition similar to that of the base material by a metal used in welding with the base material in the groove part.

Abstract: A method of repairing a ceramic coating according to an embodiment includes forming a second ceramic layer by thermally spraying ceramic spray particles to a repair section of the ceramic coating in which a first ceramic layer is formed, and melting a part of an interface, on a surface side of the ceramic coating, between the first ceramic layer and the second ceramic layer by heating the part.

Abstract: A ceramic coating includes: a ceramic layer; a molten-and-solidified layer formed on a surface of the ceramic layer; and a packed layer including ceramic packed in a crack which extends in a thickness direction of the molten-and-solidified layer.