摘要:
A fuel cell and a method for manufacturing a fuel cell are presented. The method comprises providing at least one substrate (202) and disposing a plurality of fuel cell component layers (204) on the substrate (202) by at least one physical vapor deposition (PVD) process. Each layer of the plurality comprises an edge bordering the layer (304). The fuel cell unit comprises at least one substrate (202); a plurality of fuel cell component layers (204) disposed on the substrate (202), wherein each layer (204) of the plurality comprises an edge bordering the layer (304); and at least one dense layer of material disposed over at least a portion of the edge of at least one fuel cell component layer. The at least one dense layer seals at least the aforementioned portion of the edge.
摘要:
The disclosure provides for an article (10) including a substrate (12), an environmental barrier coating (EBC) (16), a bondcoat (14), and a boron source (20). The substrate (12) includes a silicon-including material. The EBC (16) is disposed over the substrate (12), and the bondcoat (14) is disposed between the substrate (12) and the EBC (16). The bondcoat (14) includes silicon. The boron source (20) is disposed within the article (10) to provide an effective amount of boron to form an oxide (18) including silicon and at least 0.1 weight percent boron during exposure of the bondcoat (14) to an oxidizing environment at a temperature greater than 900 degrees Celsius. The oxide (18) may be a borosilicate glass that is substantially devitrification resistant to prevent spallation of the EBC (16) and thereby enhance the temperature capability of the article (10).
摘要:
Methods of fabricating coated components (100) using multiple types of fillers are provided. One method comprises forming one or more grooves (132) in an outer surface (112) of a substrate (110). Each groove has a base (134) and extends at least partially along the outer surface. A sacrificial filler (32) is deposited within the groove(s), a second filler (33) is deposited over the sacrificial filler (32), and a coating (150) is disposed over at least a portion of the outer surface and over the second filler. The method further includes removing the sacrificial filler and at least partially removing the second filler from the groove(s), to define one or more channels (130) for cooling the component.
摘要:
A high temperature component having an actuator body 201 including an actuatable portion comprising a shape memory alloy containing one more of Ni, Al, Nb, Ti and Ta and a platinum-group metal. The shape memory alloy has an altered geometry at a predetermined temperature. The actuator body 201 is also capable of operation in and is resistant to high temperature oxidizing atmospheres. A method for forming an actuator and a method for high temperature control are also disclosed.
摘要:
Disclosed herein is a turbine component comprising a substrate; and a protective structure formed on the substrate, wherein the protective structure comprises an α-β titanium alloy, a β-titanium alloy or a near-β titanium alloy. Disclosed herein too is a process for providing a protective structure to a turbine component, comprising affixing a protective structure on a turbine component; wherein the protective structure comprises an α-β titanium alloy, a near-β titanium alloy or a β-titanium alloy.
摘要:
Methods (200,300,400,500) of manufacturing turbine shrouds (10) with an abradable coating (14) that balance the apparently contradictory requirements of high flowpath solidity, low blade tip wear, and good durability in service. The methods include obtaining a shroud substrate (12). The methods may include obtaining a coating system on the shroud substrate. The methods include forming an abradable coating (14) on a surface of the coating system so as to form a substantially smooth flowpath surface. Forming the abradable coating includes forming a relatively dense scaffold (16) and relatively porous filler regions (18) in-between the relatively dense abradable scaffold. The methods may also include machining the abradable so as to achieve a substantially smooth flowpath surface comprising a relatively porous abradable phase surrounded by a relatively dense, high-durability corrale phase.
摘要:
Methods (200,300,400,500) of manufacturing turbine shrouds (10) with an abradable coating (14) that balance the apparently contradictory requirements of high flowpath solidity, low blade tip wear, and good durability in service. The methods include obtaining a shroud substrate (12). The methods may include obtaining a coating system on the shroud substrate. The methods include forming an abradable coating (14) on a surface of the coating system so as to form a substantially smooth flowpath surface. Forming the abradable coating includes forming a relatively dense scaffold (16) and relatively porous filler regions (18) in-between the relatively dense abradable scaffold. The methods may also include machining the abradable so as to achieve a substantially smooth flowpath surface comprising a relatively porous abradable phase surrounded by a relatively dense, high-durability corrale phase.
摘要:
A manufacturing method is provided. The manufacturing method includes forming one or more grooves (132) in a component that comprises a substrate (110) with an outer surface (112). The substrate has at least one interior space. Each groove extends at least partially along the substrate and has a base and a top. The manufacturing method further includes processing an intermediate surface (112) of the component to plastically deform the surface adjacent at least one edge of a respective groove (132), such that the distance across the top of the groove is reduced. Another manufacturing method is provided and includes processing an intermediate surface of the component to facet the intermediate surface in the vicinity of the groove.
摘要:
The present invention provides a method of making a flanged metal article. The method comprises (a) applying a first braze compound to a first portion of a metal article; (b) winding the first portion of a metal article with a length of a constraining metal member; and (c) heating an assembly of the metal article, the constraining metal member, and the first braze compound to a temperature above the solidus temperature of the first braze compound, typically a temperature in a range from about 300°C to about 2500°C, to provide a flanged metal article, wherein the metal article has a coefficient of thermal expansion CTE 1, the constraining metal member has a coefficient of thermal expansion CTE 2, and CTE 1 is greater than CTE 2. The invention further provides a metal flange, which minimizes thermal expansion mismatch between a high expansion metal and a low expansion brittle material.