Abstract:
A turbine stator for an aircraft turbine engine is disclosed. The turbine stator includes a stator wall supporting a high pressure air injector fixed on the downstream side, and an annular abradable element support. The lower radial end of the element support is fixed to the high pressure air injector and the upper radial end of the element support is fixed to the stator wall, such that they jointly delimit a cavity under pressure. The turbine stator also includes at least one vibration damping device located in the cavity under pressure. The vibration damping device is in contact with each of the two elements taken among the stator wall and the annular support.
Abstract:
The invention relates to a process and an apparatus for electrolytically depositing, in a moving mode, a continuous film of nickel on metal wire for electrical use. The process comprises using an activation bath and a nickel-plating bath in which the current density is reduced in the upstream portion of the nickel plating bath and/or the downstream portion of the activation bath and the acidity of the nickel-plating bath is so regulated as to develop the nickel in the form of strongly adhering globules of small diameter, which completely cover the wire. The reduction in the above mentioned current density and control in respect of the current density profile along the bath may be achieved by acting on the position of the electrodes in the bath and/or by interposing screens between the electrodes and the wire.
Abstract:
A fan rotor is provided. Each blade of the fan rotor is held by a bolt. Each blade includes a blade root engaged in a groove of the rim and held by a bolt. The bolt includes a concave plate with its curve directed upstream.
Abstract:
A shadow mask method to fabricate electrodes with nanometer scale separation utilizes nanotubes (NTs). Metal wires with gaps are made by incorporating multi-wall carbon nanotubes (MWNTs) or single-wall carbon nanotubes (SWNTs) (or bundles thereof) into a tri-layer electron beam lithography process. The simple, highly controllable, and scaleable method can be used to make gaps with widths between 1 and 100 nm. Electronic transport measurements performed on individual SWNTs bridge nanogaps smaller than 30 nm. Metallic SWNTs exhibit quantum dot behavior with an 80 meV charging energy and a 20 meV energy level splitting. Semiconducting SWNTs show an anomalous field effect transistor behavior.
Abstract:
The invention relates to a method of continuously coating electrically conductive substrates using high-speed electrolysis in which the substrate is immersed successively in an electrolytic activating bath and an electrolytic coating bath. The two baths are of the same composition and the substrate is constantly maintained in one bath. The method is applicable especially to the nickel plating of fine aluminum wires intended for the production of flexible cable for aeronautical applications. These wires may be treated in layers and at high speed.
Abstract:
To form lead or lead alloy terminals on cables comprising an insulative sheath and an aluminum core, the appropriate length of the core is bared and a metal part is fixed to the bared core. The terminal is then cast over this metal part. The metal part is compatible externally with the lead or the lead alloy forming the terminal and is compatible internally with the aluminum core. No high-resistivity substance is formed between any component layers of the resulting assembly.
Abstract:
A method is disclosed for checking and obtaining in a moving mode the continuity of a metal covering on a metal wire of different nature belonging to the group of a wire being treated by a current strength and issuing from a covering bath and wire, the treatment of which is achieved and coming from a storage wheel. The method comprises continuously bringing the coated wire in contact with a volume of electrolyte solution chemically and physically inert with respect to the wire, and in which the sensitive part of a reference electrode is immersed, sliding the wire issuing from the volume against an electrical contact, measuring the electrical potential variations between the electrode and the contact, and when the potential current oscillates, noting the poorly covered wire and increasing the current strength on the wire being treated.
Abstract:
A process for the continuous, electrolytic plating of a long span of metal with a layer of metal, having a high line speed and low period of immersion in the electrolyte, and a device therefor. The span of metal is passed through a shaving drawplate, then through a metal plating solution to which an electric voltage is applied through a fluid electric connector comprising a solution of metal chloride, a fluoride and boric acid.The process is used to plate a metal with an adhesive metal layer, which provides both ductility to facilitate extrusion and low, non-evolving contact resistance.
Abstract:
A method is disclosed for coating aluminum electrical conductors with an oxide of a controlled thickness to minimize the subsequent in situ deposition of an insulating layer of an electrically resistive oxide at the junction of the aluminum conductor and another electrical conductor.
Abstract:
A piston made of aluminum alloy with its surface treated by anodization in a phosphoric medium, onto which a layer of an anti-friction metal is deposited by electrolysis, so that the piston does not seize on contact with a cylinder with its internal wall made of aluminum alloy.