摘要:
Combinatorial high throughput screening is used to rapidly investigate and screen a multiplicity of complex thermal barrier coating candidates. In the screening method, a solution of thermal barrier coating precursors is formed and injected into a plasma jet of an air plasma spray (APS). The plasma jet is directed toward a substrate to deposit a gradient film formed from the precursors onto the substrate. An APS torch system comprises an APS torch, solution precursor vessels connected to the torch through a mixing zone and injector, a substrate oriented with respect to the torch to receive a plasma spray film formed from solution precursors from the vessels and a controller. The controller is connected to the solution precursor vessels and the torch or substrate to control mixing of the solution precursors and to control orientation of the torch or substrate to deposit a gradient film onto the substrate from the plasma spray. A CHTS array comprises a substrate and a gradient film of candidate TBC materials deposited over the substrate.
摘要:
In some embodiments, the present invention addresses the challenges of fabricating nanorod arrays comprising a heterogeneous composition and/or arrangement of the nanorods. In some embodiments, the present invention is directed to multicomponent nanorod arrays comprising nanorods of at least two different chemical compositions, and to methods of making same. In some or other embodiments, the nanorods are spatially positioned within the array in a pre-defined manner.
摘要:
The present invention relates to gated nanorod field emission devices, wherein such devices have relatively small emitter tip-to-gate distances, thereby providing a relatively high emitter tip density and low turn on voltage. Such methods employ a combination of traditional device processing techniques (lithography, etching, etc.) with electrochemical deposition of nanorods. These methods are relatively simple, cost-effective, and efficient; and they provide field emission devices that are suitable for use in x-ray imaging applications, lighting applications, flat panel field emission display (FED) applications, etc.
摘要:
A method of making a nanostructure array including disposing a masking material on a nanoporous template such that a first number of the plurality of nanopores are fully coated while a second number of the plurality of nanopores are not-fully coated by the masking material is provided. The method includes forming the nanostructures within the plurality of nanopores that are not-fully coated by the masking material. A nanostructure array fabricated in accordance to above said method and devices based on the nanostructure array is also provided.
摘要:
A water-cooled stator bar clip for electrical generators and a method for applying a corrosion-resistant protective coating, preferably Sc, Ti, Cr, Zr, Nb, Mo, Hf, Ta, W, Ni, and Al, and their alloys or oxides to existing stator bar end fittings in order to significantly reduce the possibility of leaks through the brazed connections of the copper stator bar end connections. The coatings can be applied locally using various known physical vapor deposition (“PVD”), chemical vapor deposition (“CVD”) or other direct coating techniques known in the art. For example, the coatings can be applied using ion plasma deposition, sputtering or wire arc techniques (all PVD processes) or by using electroplating, high velocity oxygen free (“HVOF”) deposition, DC arc or electroless plating. Preferably, the coatings are applied either to new stator bar clips or to existing clips in the field.
摘要:
An apparatus for cathodic arc coating. The apparatus includes: a vacuum chamber which includes: an anode; a power supply; and a cathode target assembly connected to the power supply. The cathode target assembly includes a cathode target having an interference fit stud with a threadless distal end. In the preferred embodiment, the distal end of the threadless cathode target also includes a pre-determined surface texture and a cooling block in contact with the cathode target.
摘要:
An apparatus for cathodic arc coating. The apparatus includes: a vacuum chamber which includes an anode; a power supply; and a cathode target assembly connected to the power supply. The cathode target assembly includes a cathode target and a target holder. In the preferred embodiment, a conductive interlayer is located between the cathode target and the target holder, and a cooling block is in contact with the cathode target.
摘要:
An apparatus for cathodic arc coating. The apparatus includes: a vacuum chamber which includes: an anode; a power supply; and a cathode target assembly connected to the power supply. The cathode target assembly includes a cathode target having an interference fit stud with a threadless distal end. In the preferred embodiment, the distal end of the threadless cathode target also includes a pre-determined surface texture and a cooling block in contact with the cathode target.
摘要:
A device for controlling the flow of electric current is provided. The device comprises a first conductor as thin film form; a second conductor switchably coupled to the first conductor to alternate between an electrically connected state with the first conductor and an electrically disconnected state with the first conductor. At least one conductor further comprises an electrical contact, the electrical contact comprising a solid matrix comprising a plurality of pores; and a filler material disposed within at least a portion of the plurality of pores. The filler material has a melting point of less than about 575 K. A method to make an electrical contact is provided. The method includes the steps of: providing a substrate; providing a plurality of pores on the substrate; and disposing a filler material within at least a portion of the plurality of pores. The filler material has a melting point of less than about 575 K.
摘要:
A device for controlling the flow of electric current is provided. The device comprises a first conductor as thin film form; a second conductor switchably coupled to the first conductor to alternate between an electrically connected state with the first conductor and an electrically disconnected state with the first conductor. At least one conductor further comprises an electrical contact, the electrical contact comprising a solid matrix comprising a plurality of pores; and a filler material disposed within at least a portion of the plurality of pores. The filler material has a melting point of less than about 575 K. A method to make an electrical contact is provided. The method includes the steps of: providing a substrate; providing a plurality of pores on the substrate; and disposing a filler material within at least a portion of the plurality of pores. The filler material has a melting point of less than about 575 K.