摘要:
An inductance-stable ultra high temperature circuit coupling transformer (50) used to transmit and receive alternating current power and/or data signals (29″, 33″). Primary (30″) and secondary (34″) windings are formed on nanostructured laminated (31′) primary and secondary steel cores (32″) having a Curie temperature exceeding an ultra high operating temperature. The operating range can extend from ambient to 250° C. or to in excess of 550° C. or up to 700° C. with a change in inductance of less than 10% in various embodiments.
摘要:
A thermal barrier tile (34) with a braze layer (46) co-sintered to a ceramic layer (48) is brazed to a substrate (26) of a component for fabrication or repair of a thermal barrier coating (28) for example on a gas turbine ring segment (22, 24). The tile may be fabricated by disposing a first layer of a metal brazing material in a die case (40); disposing a second layer of a ceramic powder on the metal brazing material; and co-sintering the two layers with spark plasma sintering to form the co-sintered ceramic/metal tile. A material property of an existing thermal barrier coating to be repaired may be determined (90), and the co-sintering may be controlled (93) responsive to the property to produce tiles compatible with the existing thermal barrier coating in a material property such as thermal conductivity.
摘要:
A metallic coating or alloy is provided. The metallic coating includes iron, cobalt, chromium, and aluminum. Tantalum may also be included. A new addition in nickel based coating with stabilized gamma/gamma′ phases at high temperatures lead to a reduction of local stresses. A component including the metallic coating or alloy is also provided.
摘要:
A manufacturing method for manufacturing a slice for making or repairing a heat protective coating of a hot gas path component of a gas turbine is provided. The manufacturing method includes debinding a prepreg made of at least two sheets containing powder bound by a binder and Spark Plasma Sintering the at least two debound sheets.
摘要:
A thermally protective coating (21), such as may be used over a nickel-based superalloy substrate (24). The protective coating (21) includes a CoNiCrAlY or a NiCoCrAlY material and addition of given amounts of one or more secondary elements. The secondary element(s) facilitate and/or join in one or more precipitation mechanisms (γ′, B2) that retain an aluminum reservoir in the protective coating (21), reducing aluminum diffusion into the substrate (24). This aluminum reservoir maintains a protective alumina scale (38) on the coating (21), thus improving coating life and allowing higher operating temperatures.
摘要:
Bi-casting a platform (50) onto an end portion (42) of a turbine airfoil (31) after forming a coating of a fugitive material (56) on the end portion. After bi-casting the platform, the coating is dissolved and removed to relieve differential thermal shrinkage stress between the airfoil and platform. The thickness of the coating is varied around the end portion in proportion to varying amounts of local differential process shrinkage. The coating may be sprayed (76A, 76B) onto the end portion in opposite directions parallel to a chord line (41) of the airfoil or parallel to a mid-platform length (80) of the platform to form respective layers tapering in thickness from the leading (32) and trailing (34) edges along the suction side (36) of the airfoil.
摘要:
An integrated, self-powered, sensing and transmitting module (300) that can be placed within an operating environment, such as by being affixed to a gas turbine engine component, in order to sense the local operating environment and to deliver real-time operating environment data to a location outside of the environment. Such a module may integrate a power element (302); a sensing element 9304); and a transmitting element (308) on a single substrate (320) within a single housing (310). Both sensors and circuitry components are formed directly on or in the substrate in novel configurations to decrease the size and weight of the module.
摘要:
A system of layers in a protective coating (20) for a substrate (22), including at least an outer thermal barrier layer (32) and a tungsten bronze structure ceramic underlayer (30) that reduces spalling of the outer layer. The range of materials for the underlayer includes ceramics of the form Ba6−3mRe8+2mTi18O54, where 0
摘要:
A system of layers in a protective coating (20) for a substrate (22), including at least an outer thermal barrier layer (32) and a tungsten bronze structure ceramic underlayer (30) that reduces spalling of the outer layer. The range of materials for the underlayer includes ceramics of the form Ba6−3mRe8+2mTi18O54, where 0
摘要:
A circuit assembly (34) affixed to a moving part (20) of a turbine for receiving information about a condition of the part and transmitting this information external to the engine. The circuit assembly includes a high-temperature resistant package (34A) that attaches to the part. A high temperature resistant PC board (42) supports both active and passive components of the circuit, wherein a first group of the passive components are fabricated with zero temperature coefficient of resistance and a second group of the passive components are fabricated with a positive temperature coefficient of resistance. The active components are fabricated with high temperature metallization. Connectors (40) attached to the PC board pass through a wall of the package (34A) for communication with sensors (30) on the part and with an antenna (26) for transmitting data about the condition of the part to outside the turbine.