摘要:
A method of imparting one or more of a variety of functional characteristic to a portion of an engine (e.g., a turbine or diesel engine) by depositing particles from different particle feedstocks so as to form a high temperature resistant coating on a surface of the engine portion, where the particle feedstocks are varied in-situ while the particle are being deposited and at least one functional characteristic corresponds to, or results from, using different particle feedstocks.
摘要:
Methodologies for non-destructively inspecting and characterizing micro-structural features in a thermal barrier coating (TBC) on a component, wherein the micro-structural features define pores and cracks, if any, in the TBC. The micro-structural features having characteristics at least in part based on a type of process used for developing the TBC and affected by operational thermal loads to which a TBC is exposed. In one embodiment, the method allows detecting micro-structural features in a TBC, wherein the detecting of the micro-structural features is based on energy transmitted through the TBC, such as may be performed with a micro-feature detection system 20. The transmitted energy is processed to generate data representative of the micro-structural features, such as may be generated by a controller 26. The data representative of the micro-structural features is processed (e.g., by a processor 30) to determine at least one of the following: volumetric porosity information for the TBC and variation in the characteristics of the micro-structural features over a thickness of the TBC. Based on the results of the data processing, information is generated regarding at least one of the following: a present condition of the thermal barrier coating and a future likely condition of the thermal barrier coating. In another embodiment, one can estimate a level of thermal load to which the thermal barrier coating has been exposed.
摘要:
A metallic coating is provided. The nickel based metallic coating includes tantalum, cobalt, chromium, and aluminum. The nickel based metallic coating does not include silicon and/or hafnium and/or zirconium. A tantalum addition in nickel based coating stabilized the phases gamma/gamma1 at high temperatures leading to a reduction of local stresses.
摘要:
A method for forming a textured bond coat surface (48) for a thermal barrier coating system (44) of a gas turbine component (34). The method includes selectively melting portions of a layer of alloy particles (16) with a patterned energy beam (20) to form successive layers of alloy material (16′, 16″) until a desired surface geometric feature (26) is achieved. The energy beam pattern may be indexed between layers to form a protruding undercut (28) in the geometric feature. The patterned energy beam may be formed by directing laser energy from a diode laser (30) through a cartridge filter (32). Particles of a flux material (18) may be melted along with the alloy particles to form a protective layer of slag (22) over the melted and cooling alloy material.
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 telemetry system for use in a combustion turbine engine (10) that includes a first sensor (306) in connection with a turbine blade (301) or vane (22). A first telemetry transmitter circuit (312) is affixed to the turbine blade and routes electronic data signals, indicative of a condition of the blade, from the sensor to a rotating data antenna (314) that is affixed to the turbine blade or is on a same substrate as that of the circuit. A stationary data antenna (333) may be affixed to a stationary component (323) proximate and in spaced relation to the rotating data antenna for receiving electronic data signals from the rotating data antenna. A second sensor (335) transmits electronic data signals indicative of the stationary component to a second telemetry circuit (332), which routes the signals to the stationary antenna. The stationary antenna transmits the electronic data signals to a receiver (338).
摘要:
In a telemetry system for use in an engine, a circuit structure (34) affixed to a moving part (20) of the engine is disposed for amplifying information sensed about a condition of the part and transmitting the sensed information to a receiver external to the engine. The circuit structure is adapted for the high temperature environment of the engine and includes a differential amplifier (102, 111) having an input for receiving a signal from a sensor (101, 110) disposed on the part. A voltage controlled oscillator (104, 115) with an input coupled to the output of the amplifier produces an oscillatory signal having a frequency representative of the sensed condition. A buffer (105, 116) with an input coupled to the output of the oscillator buffers the oscillatory signal, which is then coupled to an antenna (26) for transmitting the information to the receiver.
摘要:
A component including a surface subject to wear by an electrically conductive wear counterface (50). The component comprises a substrate (10); one or more material layers (32) overlying the substrate (10); a wear surface layer (16) overlying the one or more material layers (32); a first pair of spaced apart and electrically open wear sensor conductors (12/14) disposed in the substrate (10), in the one or more material layers (32), or in the wear surface layer (16); a first wear warning electrical circuit (68/69/70/74) for communicating with the first pair of conductors (12/14) for providing a first wear warning; and wherein when the wear counterface (50) has worn overlying layers, the wear counterface (50) interconnects the first pair of conductors (12/14) to activate the first wear warning circuit (68/69/70/74).
摘要:
A metallic bondcoat with phases of γ and γ′ is provided. The metallic coating or alloy is nickel based. The metallic coating or alloy has γ and γ′ phases and optionally has β-phase. The new addition in nickel based coating stabilizes the phases γ and γ′ at high temperatures leading to a reduction of local stresses.
摘要:
A telemetry system for use in a combustion turbine engine (10) having a compressor (12), a combustor and a turbine (16) that includes a sensor (50, 74) in connection with a turbine blade (18) or vane (22). A telemetry transmitter circuit (210) may be affixed to the turbine blade (18) with a first connecting material (52, 152) deposited on the turbine blade (18) for routing electronic data signals from the sensor (50, 74) to the telemetry transmitter circuit (210), the electronic data signals indicative of a condition of the turbine blade (18). An induction power system for powering the telemetry transmitter circuit (210) may include a rotating data antenna (202) affixed to the turbine blade (18) with a second connecting material (140) deposited on the turbine blade (18) for routing electronic data signals from the telemetry transmitter circuit (210) to the rotating data antenna (202). A stationary data antenna (184) may be affixed to a static seal segment 180 adjacent the turbine blade (18) for receiving electronic data signals from the rotating data antenna (202).