H.e.f.

Centre National De La Recherche Scientifique

Centre Stephanois De Recherches Mecaniques Hydromecanique Et Frottement

Universite Jean Monet

Ecole Central De Lyon

Ecole Centrale De Lyon

Hydromecanique Et Frottement

Université Jean-monnet

Philippe Maurin-Perrier

Christophe Heau

Olivier Blandenet

Herve Chavanne

Emmanuel Masse

Michel Martin

Laurent Bombillon

Beat Schmidt

Florent Ledrappier

Jean-Paul Terrat

Laurent Houze

Denis Mazuyer

Daniel Viviani

Yves Gachon

Benoit Terme

Smail Aaziz

Eric Audouard

Christophe Donnet

Louis Mourier

Laure Poigt

Hervé Chavanne

Smaïl Aaziz

Benoît Terme

The present invention concerns a friction piece () suitable for operating in a lubricated medium at a temperature higher than 200&#xb0; C. The piece () comprises a metal surface () and an external coating () composed of tungsten carbide doped with nitrogen WC(N) with an atomic ratio of nitrogen between 5 and 12%. The invention also relates to a mechanical system () comprising such a piece (). The invention also relates to a method for implementing such a piece ().

Friction piece, mechanical system comprising such a friction piece and method of implementation

The element is formed from the winding of a fabric of small thickness ranging between 20 &#x3bc;m and 150 &#x3bc;m and mixed with a resin containing fillers. The fabric has the form of strips having a width ranging between 5 mm and 200 mm, with the strips being crossed in several layers.

Self-lubricating articulation element made from a composite material and operating under high dynamic loadings

An inside surface of an internal combustion engine liner is treated to have a surface roughness Ra smaller than 0.06 &#x3bc;m, and then receives a DLC coating. A method of producing the internal combustion engine liner includes: forming the liner from a metal material, polishing an inside surface of the liner to obtain a polished inside surface of roughness Ra smaller than 0.06 &#x3bc;m, and applying the DLC coating to the polished inside surface.

Internal combustion engine liner

This assembly includes a ball joint assembled in a casing, and receiving an axle capable of sliding and/or rotating therein. The ball joint is formed from the winding of a fabric of small thickness ranging between 20 &#x3bc;m and 150 &#x3bc;m and mixed with a resin comprising fillers. The fabric has the form of strips having a width ranging between 5 mm and 200 mm; the strips being crossed in several layers.

Self-lubricating hinge assembly made from composite material and operating under high dynamic loads

A molten-salt bath for nitriding mechanical steel parts, essentially consisting of the following (the contents being expressed in wt %): 25 to 60 wt % of alkali-metal chlorides; 10 to 40 wt % of alkali-metal carbonates; 20 to 50 wt % of alkali-metal cyanates; and a maximum of 3 wt % of cyanide ions (formed during the use of the bath), wherein the total of the contents is 100 wt %. Preferably, the bath contains: 25 to 30 wt % of sodium cyanate; 25 to 30 wt % of sodium carbonate and lithium carbonate; 40 to 50 wt % of potassium chlorides; and a maximum of 3 wt % of cyanide ions (formed during the use of the bath), the total of the contents being 100 wt %.

Molten-salt bath for nitriding mechanical parts made of steel, and implementation method

The device includes at least two coaxial waveguides each formed of a central conductor and of an external conductor to bring microwaves into a treatment chamber. The at least two electromagnetic wave injection guides are combined with a magnetic circuit elongated in one direction. The magnetic circuit surrounding the waveguides by creating a magnetic field capable of achieving an ECR condition close to the waveguides.

Device for generating plasma having a high range along an axis by electron cyclotron resonance (ECR) from a gaseous medium

The lubricated environment incorporates a friction modifier, and a coating is applied to the part. The coating is chromium nitride and the friction modifier is MoDTC. The chromium nitride presents an NaCl-type crystallization and a microhardness of 1,800+/&#x2212;200 HV.

Friction piece operating in a lubricated medium

A method for processing parts for kitchen tools in order to protect the parts from scratches, includes sequentially: a nitridation step, optionally including a nitrocarburizing step, between 592 and 750&#xb0; C. in order to promote the formation of a nitrogen austenite layer; and a processing step for promoting the conversion of at least a portion of the nitrogen austenite into a phase with reinforced hardness.

Method of treating parts for kitchen utensils

A part has a layer with a WC-C composition gradient, with the exception of a metal-containing undercoat and with the exception of an ion implantation layer and a DLC surface layer having cohesive behavior in scratch tests.

Part having a DLC coating and method for applying the DLC coating

A device for generating a cold plasma in a vacuum enclosure includes a cathode body having hollow chambers for confining the plasma. Magnets are placed around each hollow chamber for creating a magnetic field forcing electrons to rotate about the field lines. The cathode body cooperates with an element for circulating a coolant to extract the heat generated by an intense ion bombardment at each of the hollow chambers.

Device for generating cold plasma in a vacuum chamber and use of said device for thermo-chemical processing

Friction part in a lubricated medium working at contact pressures above 200 MPa and having a contact surface that is textured and subjected, before or after texturizing, to a case hardening treatment for a tribological function, wherein the surface is subjected to operations for producing a periodic network of micrometric cavities having predefined shapes and sizes and a period adapted to the width of the contact surface in order to promote passage to elastohydrodynamic lubrication regime.

Friction piece in a lubricated medium, working at contact pressures higher than 200 MPa

A method of treating a surface of at least one part by individual sources of an electron cyclotron resonance plasma is characterized by subjecting the part(s) to at least one movement of revolution with regard to at least one fixed linear row of elementary sources. The linear row or rows of elementary sources are disposed parallel to the axis or axes of revolution of the part or parts.

Method of treating a surface of at least one part by means of individual sources of an electron cyclotron resonance plasma

A cathode sputtering target includes: between 30 and 40 atomic % of a metal, between 2 and 10 atomic % of nitrogen, and between 35 and 50 atomic % of oxygen. The remainder up to 100% is constituted by at least one element selected from the group that comprises phosphorous (P), boron (B), silicon (Si), germanium (Ge), gallium (Ga), sulphur (S) and aluminium (Al). Also provides a method of manufacturing a thin film from the target, and an electrochemical device comprising the thin film.

Oxynitride sputtering target

A thin layer is deposited on a surface having a roughness profile whereof the parameters and mean period are determined for improving the tribological performance, so that the ratio A between the square of the mean period of the profile (P) in &#x3bc;m and the roughness profile (Pa) in &#x3bc;m, as defined by French standard ISO 4288, is equal to or greater than 5&#xd7;10&#x3bc;m.

Sliding mating part in lubricated regime, coated by a thin film

The invention relates to a superficial treatment method by electrolysis of ferrous surfaces to enhance friction or tread and seizing resistance features, wherein the surfaces provide the electrolysis anode, the electrolysis bath includes a sulphur species, primarily contains water and also contains a chloride salt and a nitrogen species in quantities which facilitates the sulphuration reaction of the surfaces.

Growing community of inventors

Saint Marcellin en Forez, France

Philippe Maurin-Perrier