摘要:
A solid oxide fuel cell comprises at least one hollow manifold, an anode, an electrolyte, and a cathode. The at least one hollow manifold comprises a wall that defines a chamber therein. A plurality of openings extending through, such that the plurality of openings are in flow communication with the chamber. The anode is formed on an exterior surface of the wall. The electrolyte is deposited on the anode, and the cathode is deposited on the electrolyte.
摘要:
An erosion resistant protective structure for a turbine engine component comprises a shape memory alloy. The shape memory alloy includes nickel-titanium based alloys, indium-titanium based alloys, nickel-aluminum based alloys, nickel-gallium based alloys, copper based alloys, gold-cadmium based alloys, iron-platinum based alloys, iron-palladium based alloys, silver-cadmium based alloys, indium-cadmium based alloys, manganese-copper based alloys, ruthenium-niobium based alloys, ruthenium-tantalum based alloys, titanium based alloys, iron-based alloys, or combinations comprising at least one of the foregoing alloys. Also, disclosed herein are methods for forming the shape memory alloy onto turbine component.
摘要:
An alloy, an article comprising the alloy, and methods for manufacturing and repairing an article that employ the alloy are presented. The alloy comprises, in atom percent, at least about 50% rhodium, up to about 49% of a first material, from about 1% to about 15% of a second material, and up to about 10% of a third material. The first material comprises at least one of palladium, platinum, iridium, and combinations thereof. The second material comprises at least one of tungsten, rhenium, and combinations thereof. The third material comprises at least one of ruthenium, chromium, and combinations thereof. The alloy comprises an A1-structured phase at temperatures greater than about 1000° C., in an amount of at least about 90% by volume.
摘要:
A device for measuring at least one property of a material sample is disclosed. The device includes at least one sensor element which is formed by a direct-write technique. The device can be an instrument for measuring strain in the sample, or for measuring other properties or attributes of a sample, such as temperature. A turbine engine disk on which components of property-measuring devices have been direct-written is also described. Methods of forming sensor elements for property-measuring devices are disclosed.
摘要:
Improved compositions are described for the protection of gas turbine parts at elevated temperatures. The compositions are of the MCrAlY type, wherein M is Nickel, or Nickel in combination with cobalt and/or iron. The compositions further comprise a lanthanide, a group 4 metal selected from hafnium, zirconium, titanium, or a combination of these, and optionally, a group 14 element selected from silicon and/or germanium. The combination results in improved Al retention properties. Also disclosed herein are articles comprising the coatings.
摘要:
A device for measuring at least one property of a material sample is disclosed. The device includes at least one sensor element which is formed by a direct-write technique. The device can be an instrument for measuring strain in the sample, or for measuring other properties or attributes of a sample, such as temperature. A turbine engine disk on which components of property-measuring devices have been direct-written is also described. Methods of forming sensor elements for property-measuring devices are disclosed.
摘要:
An alloy comprising rhodium, aluminum, and chromium, wherein a microstructure of the alloy comprises a face-centered-cubic phase and a B2-structured phase and is essentially free of an L12-structured phase at temperatures greater than about 1000° C., and a gas turbine engine component comprising the alloy.
摘要:
Improved compositions are described for the protection of gas turbine parts at elevated temperatures. The compositions are of the MCrAlY type, wherein M is selected from nickel, or a combination of nickel with cobalt, iron, or combinations thereof. The compositions further comprise palladium, platinum, rhodium, or combinations thereof, hafnium, titanium, zirconium, or combinations thereof; and can further include silicon, germanium, or combinations thereof, wherein the composition results in improved Al retention properties. Also disclosed herein are articles comprising the coatings.
摘要:
A method for repairing an article comprises providing an article, providing a repair material, and joining said repair material to said article. The repair material comprises, in atom percent, at least about 50% rhodium; up to about 49% of a first material, said first material comprising at least one of palladium, platinum, iridium, and combinations thereof; from about 1% to about 15% of a second material, said second material comprising at least one of tungsten, rhenium, and combinations thereof; and up to about 10% of a third material, said third material comprising at least one of ruthenium, chromium, and combinations thereof. The repair material comprises an A1-structured phase at temperatures greater than about 1000° C., in an amount of at least about 90% by volume.
摘要:
A method for evaluating the thermal exposure of a selected metal component which has been exposed to changing temperature conditions is described. The voltage distribution on a surface of the metal component, or on a metallic layer which lies over the component, is first obtained. The voltage distribution usually results from a compositional change in the metal component. The voltage distribution is then compared to a thermal exposure-voltage model which expresses voltage distribution as a function of exposure time and exposure temperature for a reference standard corresponding to the metal component. In this manner, the thermal exposure of the selected component can be obtained. A related device for evaluating the thermal exposure of a selected metal component is also described.