WO1996020083A1 - LUBRIFIANT A BASE D'UNE MATRICE POLYMERE/METAl DE TRANSITION ET PROCEDE D'UTILISATION - Google Patents

LUBRIFIANT A BASE D'UNE MATRICE POLYMERE/METAl DE TRANSITION ET PROCEDE D'UTILISATION Download PDF

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Publication number
WO1996020083A1
WO1996020083A1 PCT/US1994/014882 US9414882W WO9620083A1 WO 1996020083 A1 WO1996020083 A1 WO 1996020083A1 US 9414882 W US9414882 W US 9414882W WO 9620083 A1 WO9620083 A1 WO 9620083A1
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Prior art keywords
composite material
transition metal
polymer matrix
disulfide
matrix composite
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PCT/US1994/014882
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English (en)
Inventor
Vincent Felice Salvia
Original Assignee
Vincent Felice Salvia
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by Vincent Felice Salvia filed Critical Vincent Felice Salvia
Priority to AU14455/95A priority Critical patent/AU1445595A/en
Priority to PCT/US1994/014882 priority patent/WO1996020083A1/fr
Publication of WO1996020083A1 publication Critical patent/WO1996020083A1/fr

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/02—Parts of sliding-contact bearings
    • F16C33/04—Brasses; Bushes; Linings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D5/00—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures
    • B05D5/08—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures to obtain an anti-friction or anti-adhesive surface
    • B05D5/083—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures to obtain an anti-friction or anti-adhesive surface involving the use of fluoropolymers
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M103/00—Lubricating compositions characterised by the base-material being an inorganic material
    • C10M103/06—Metal compounds
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M107/00—Lubricating compositions characterised by the base-material being a macromolecular compound
    • C10M107/38—Lubricating compositions characterised by the base-material being a macromolecular compound containing halogen
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M111/00—Lubrication compositions characterised by the base-material being a mixture of two or more compounds covered by more than one of the main groups C10M101/00 - C10M109/00, each of these compounds being essential
    • C10M111/04—Lubrication compositions characterised by the base-material being a mixture of two or more compounds covered by more than one of the main groups C10M101/00 - C10M109/00, each of these compounds being essential at least one of them being a macromolecular organic compound
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2201/00—Inorganic compounds or elements as ingredients in lubricant compositions
    • C10M2201/06—Metal compounds
    • C10M2201/0603—Metal compounds used as base material
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2201/00—Inorganic compounds or elements as ingredients in lubricant compositions
    • C10M2201/06—Metal compounds
    • C10M2201/061—Carbides; Hydrides; Nitrides
    • C10M2201/0613—Carbides; Hydrides; Nitrides used as base material
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    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
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    • C10M2201/00—Inorganic compounds or elements as ingredients in lubricant compositions
    • C10M2201/06—Metal compounds
    • C10M2201/062—Oxides; Hydroxides; Carbonates or bicarbonates
    • C10M2201/0623—Oxides; Hydroxides; Carbonates or bicarbonates used as base material
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    • C10M2201/065—Sulfides; Selenides; Tellurides
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    • C10M2201/065—Sulfides; Selenides; Tellurides
    • C10M2201/066—Molybdenum sulfide
    • C—CHEMISTRY; METALLURGY
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    • C10M2201/0663—Molybdenum sulfide used as base material
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    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
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    • C10M2201/08—Inorganic acids or salts thereof
    • C10M2201/0803—Inorganic acids or salts thereof used as base material
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    • C10M2201/00—Inorganic compounds or elements as ingredients in lubricant compositions
    • C10M2201/085—Phosphorus oxides, acids or salts
    • C10M2201/0853—Phosphorus oxides, acids or salts used as base material
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2201/00—Inorganic compounds or elements as ingredients in lubricant compositions
    • C10M2201/086—Chromium oxides, acids or salts
    • C10M2201/0863—Chromium oxides, acids or salts used as base material
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2201/00—Inorganic compounds or elements as ingredients in lubricant compositions
    • C10M2201/087—Boron oxides, acids or salts
    • C10M2201/0873—Boron oxides, acids or salts used as base material
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
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    • C10M2201/10—Compounds containing silicon
    • C10M2201/1006—Compounds containing silicon used as base material
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    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
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    • C10M2201/102—Silicates
    • C10M2201/1023—Silicates used as base material
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
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    • C10M2201/10—Compounds containing silicon
    • C10M2201/102—Silicates
    • C10M2201/103—Clays; Mica; Zeolites
    • C10M2201/1033—Clays; Mica; Zeolites used as base material
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
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    • C10M2201/105—Silica
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    • C10M2201/12—Glass
    • C10M2201/123—Glass used as base material
    • C—CHEMISTRY; METALLURGY
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    • C10M2211/06—Perfluorinated compounds
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    • C10M2213/0606—Perfluoro polymers used as base material
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    • C10M2213/062—Polytetrafluoroethylene [PTFE]
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    • C10M2213/062—Polytetrafluoroethylene [PTFE]
    • C10M2213/0623—Polytetrafluoroethylene [PTFE] used as base material

Definitions

  • This invention specifically relates to the unique and unanticipated improvement of characteristics realized through a transition metal/polymer matrix composite consisting of transition metal dichalcogenides (TMDs) (particularly tungsten disulfide, molybdenum disulfide) and polymers (particularly polytetrafuoro ⁇ ethylene (PTFE) , regarding their combined beneficial effects upon the lubrication and wear resistance of substrata to which they are applied.
  • TMDs transition metal dichalcogenides
  • PTFE polytetrafuoro ⁇ ethylene
  • Friction is a significant problem in all mechanical systems and can result in wear, noise, the generation of excess heat and excessive energy consumption.
  • the reduction of friction is an ever growing concern in the transportation based industries because of the presently escalating costs of fuel and the rising consumer demand for reliable, long lasting vehicles.
  • Engines and drive trains include a large number of moving parts and even a small reduction in friction will have a great economic impact upon land, air and sea based transportation.
  • friction is a major problem in all industries which manufacture or utilize systems and equipment having moving parts.
  • Petroleum based lubricants either in a liquid or solid form, such as oils, greases and the solid form PTFE of are very important in reducing friction in a variety of mechanical systems; however, petroleum based lubricants, relative to TMDs, have low load carrying abilities which limits their effectiveness and their usefulness in high load bearing applications. In some instances systems include precision parts or working environments that would be contaminated by breakdown and outgassing of liquid lubricants.
  • Dry lubricants have been developed in response to the various shortcomings of liquid lubricants. Dry lubricants generally comprise materials which are fairly inert and which have a lamellar structure which causes them to be lubricous. Among some of the widely utilized dry lubricants are graphite, talc, molybdenum disulfide, tungsten disulfide, niobium disulfide, and boron nitride. Other dry lubricant materials such as ditellurides and diselenides of various group V and VI metals are also employed. In some instances, particles of a lubricous polymer, such as PTFE or other such fluorocarbon polymers, are utilized as dry lubricants.
  • a lubricous polymer such as PTFE or other such fluorocarbon polymers
  • Dry lubricant materials are generally employed in a loose powdered form, or they may be used in combination with a liquid lubricant. Loosely applied lubricant coatings wear away and must be continually renewed. Further, loose particles of lubricant can contaminate a variety of systems.
  • lubricant as used to describe the lubricant is meant to define a lubricant film which is tightly bonded and integral with the workpiece surface, and is in contrast to lubricant films which are merely disposed upon the surface.
  • articles are coated with fluorocarbon polymers so as to provide a highly lubricous surface; however, these coatings are generally soft and have a tendency to migrate off a substrate surface when exposed to pressures.
  • Permanent lubricant materials can confer a significant advantage in terms of improved operating efficiencies and increased lifetime to engines, transmissions and other components of automobiles, airplanes and other motor vehicles.
  • the present invention is directed toward producing a lubricious wear and corrosion resistant compound adapted to refrain from migrating away from highly loaded contact areas.
  • Use of the present invention enables the production of vehicles as well as processing equipment, tools, and manufacturing equipment which are longer lasting, more energy efficient and more reliable.
  • the present invention provides a durable, wear resistant lubricious coating which can be caused to bond to a desired surface and reduce friction, wear and energy consumption.
  • the specific components are TMD's (particularly tungsten disulfide and molybdenum disulfide) and polymers (particularly polytetrafluoro- ethylene) (PTFE) .
  • TMD's organic chemistry
  • TMD's inorganic chemistry
  • This invention brings together the unique properties of organic chemistry (PTFE) and inorganic chemistry (TMD's) which creates a synergistic interaction optimizing the friction reducing properties of PTFE with similar friction reducing properties of select TMD's and the TMD's additional wear-resistance and natural tendency for forming a tenacious physical bond at a molecular level.
  • the invention comprises a mixture of PTFE and TMDs (particularly tungsten disulfide and molybdenum disulfide) which can be applied to a substrate through a variety of mechanisms and manners to form a lubricious and wear-resistant layer ranging from .5 micron to 60 microns thick.
  • the compound may include various proportions of PTFE and TMD's to provide a lubricant having various coefficient of friction and material load carrying characteristic properties tailored to specific applications.
  • a mixture of the composite would be prepared for general use—using equal amounts of each component—or "use specific" in which the mixture is formulated to meet specific use requirements, i.e., under lower load needs use a higher percentage of PTFE and where higher load needs exist use a higher percentage of select TMD materials.
  • the present invention presents several methods of applying the invention as a permanent, wear-resistant, lubricous coating to a substrate which exists in either a dry or liquid environment.
  • the step of cleaning the workpiece may comprise the steps of providing a liquid based cleaning bath and immersing the workpiece in the cleaning bath.
  • the step of cleaning the workpiece is abrasively cleaned.
  • a protective coating may need to be applied to the workpiece concomitant with the step of cleaning to insure the workpiece remains free of contaminants. Impingement bonding this matrix composite material formed of a mixture of PTFE and select TMDs onto a workpiece allows for a deposition which does not require binders, adhesives or excessive temperatures.
  • the method includes the steps of: 1) providing at least one workpiece, 2) cleaning the surface of the workpiece to remove substantially all contaminants therefrom impingement bonding the invention as described onto at least a portion of the workpiece, and 3) a mechanical impingement process whereby the workpiece in placed in a rotating container which contains the formulated invention mixture.
  • the mechanical impingement process can be enhanced through the introduction of a material carrying the compound and associated burnishing media.
  • the invention may be disposed in a stream of carrier gas which is directed onto the workpiece with force sufficient to cause the lubricant to bond to the surface of the workpiece. Sufficient force is provided by pressurizing the gas stream to approximately 30-200 psi.
  • the TMD's selected bind with the PTFE and the new compound forms a tenacious physical bond at the molecular level when such conditions exist. Without the unique combination of this compound the MoS2 and PTFE components would not bind to the substrate surface.
  • Liquid application of the invention requires first converting the selected dry powder PTFE and TMD selected compound materials into a stabilized colloidal suspension. This is done by those knowledgeable in the art of this process. The invention is readily converted into this format using existing technology that is known to those skilled in the art of creating particle suspension in colloidal solution.
  • the invention may be introduced into an end product where reduced friction and wear-resistance is desirable.
  • the invention in solution may be added directly or, if desired, may be premixed into another carrier media such as an oil or other type of lubricant or general liquid media.
  • the invention may added to such things as engine crankcases, manual transmissions, rear end differentials, bearing applications or any application desired.
  • the invention will transmigrate from its suspended colloidal form to become bonded to the working surface of the substrates in comes in contact with. Once bonded it will maintain its friction and wear-resistance protection and work in conjunction with any material which may remain is solution.
  • transition metal/polymer matrix composite which is a durable, wear-resistant lubricous material.
  • the material is a composite of PTFE and select TMD's (particularly tungsten disulfide and molybdenum disulfide) .
  • TMD's particularly tungsten disulfide and molybdenum disulfide
  • PTFE Polytetrafuoroethylene
  • PTFE is an organic homopolymer from tetrafluoroethylene monomer. It is a linear carbon chain encapsulated within a shroud of flourine atoms. The alignment of the atoms is such that a balance exists between the internal electropositivity and an external electronegativity which yields no net charge difference and contributes to its inert chemical nature. With this molecular structure PTFE exhibits a low coefficient of friction resulting from the weak bond forces between the external positioned flourine atoms and substrates in which they come in contact with.
  • PTFE has a specific gravity of 2.13-2.22, a dynamic coefficient of friction of 0.1 and is a relatively soft material having a hardness rating of 50-65 on the Shore D scale.
  • PTFE is available from the Du Pont Company, Little Falls Centre I, Willmington, DE 19880-0810 U.S.A.
  • the select TMDs used are tungsten disulfide and molybdenum disulfide. These materials are diatomic cross-linked molecular structures which form a lubricous layer. Both materials are naturally inert.
  • the absolute density of tungsten disulfide (WS2) is 7.4 grams per cubic centimeter.
  • Tungsten disulfide is commercially available from sources such as GTE Sylvania of Towanda, Pennsylvania, U.S.A.
  • the molecular weight of molybdenum disulfide (MoS2) is 160.06 with a nominal density of 4.96 grams per cubic centimeter.
  • Repurified MoS2 is available from sources such as Climax Molybdenum Corporation, a division of Amex, Inc.
  • the crystal structure of both materials is that of a laminar, layer-lattice type, in which a planar layer of tungsten atoms are interspersed between two layers of sulfur atoms.
  • the load carrying capabilities of these TMDs has been measured as high as 300,000 psi.
  • WS2 and MoS2 are classified as transition metal dichalcogenides (TMD) which includes the disulfides, diselenides and ditellurides of Ti, Zr, Hf, V, Nb, Cr, Mo and W. These compounds form triagonal prisms with six chalcogen atoms to form the hexagonal type crystal.
  • TMD transition metal dichalcogenides
  • the beneficial lubricating characteristics of WS2 and MoS2 are related to the layered crystal structures (the large spacing and the weak Van der Waals bonding) between the sandwiched layers.
  • the carbon atoms are arranged in a linear manner with the flourine atoms totally encapsulating them.
  • the external charge of the PTFE molecule carries a uniform negative charge which causes low interfacial forces as a result of electrorepulsion.
  • a lubricating effect occurs because of the ease of shearing between layers of PTFE and between the PTFE and the substrate onto which it is deposited.
  • This invention creates an improvement over the known benefits and unique characteristics of select TMD's and PTFE, individually, while addressing a limitation in the in the deposition and retention of PTFE on a surface without binders, adhesives and increased temperature.
  • PTFE as a single dry film lubricant, will not adhere to a substrate and will "migrate” away from even moderately loaded contact areas and lose its effectiveness under extreme pressure working surfaces.
  • the present invention causes the PTFE to be molecularly interlocked within the select TMDs on a substrate surface at the point of contact.
  • the PTFE and TMD molecules are "interlocked” or “driven into” each other during the deposition process. This phenomenon, called intercalation, prevents migration off of the working surface area by the PTFE.
  • PTFE is a relatively soft material and is unsuited for many tribological applications. Converting PTFE into equivalent load carrying properties yields a maximum of only 120 psi measured at 1200 feet and a velocity of 10 feet per minute. At slightly higher ranges PTFE's load carrying properties reduce to only 2.5 psi at 1000 feet per minute for distance of 2500 feet. Independent laboratory tests demonstrated that the selected TMDs are far superior in the areas of friction and wear under moderate load conditions.
  • the select TMD's WS2 and MoS2 are cystalline structures. When bonded onto a bearing surface these materials will still not cover the surface 100%. Resultant microscopic "pin holes" will expose enough surface so that oxidation may occur as water molecules bond to the exposed surface.
  • the PTFE component of this invention will provide increased effectiveness during the intercalation process and reduce, and conceivably eliminate, the amount of exposed surface which will create an improved or fully corrosion resistant lubricious surface.
  • TMDs particularly WS2 and MoS2
  • WS2 and MoS2 provides a thin film coating, however, it is difficult to obtain a layer greater than .5 to 3 microns.
  • PTFE tungsten carbide
  • This invention allows the lubrication and wear resistant properties of PTFE and TMDs, particularly WS2 and MoS2, to be efficiently realized, providing optimal tribological properties not before experienced. It uniquely combines the beneficial characteristics which exist within the organic and inorganic materials at the molecular and atomic level to create a superior wear resistant, lubricious and corrosion resistant material.
  • the material in addition, can be readily applied at room temperature without the use of binders or adhesives, or if desired, in a colloidal solution which will allow transfer of the material to the desired substrate during the normal lubrication cycles of engine, gear, or other mechanical, manual or electronic devices.
  • the invention identifies that it is possible to calibrate a mixture of PTFE and select TMDs to address the specific needs of each and every application. This includes the ability to build a heavier concentration of material when specifications require it using an equal mix of the PTFE and selected TMDs, or to create a thinner coating as required by using a lower ratio of PTFE to the select TMDs used.
  • the range of mix ratios of PTFE and select TMDs, particularly WS2 and MoS2, in the present invention slides along a scale from 00.1:99.9 to 99.9:00.1, depending upon the specific characteristics desired and the environment in which the material is to function.
  • the nominal formulation which is effective for a typical use is equal amounts of the TMDs (particularly tungsten disulfide, molybdenum disulfide) and a polymer (particularly polytetrafluoroethylene) .
  • the mix ratio is skewed to a higher percentage of PTFE when load carrying and wear resistance needs are lower.
  • the mix ratio is skewed to a higher percentage of select TMDs.
  • Such broad load, friction and wear resistance ranges have application in aerospace, pharmaceutical, automotive, paper, packaging, food and virtually any other manufacturing or non-service oriented industry.
  • the effectiveness of this invention results from the unique interaction of transition metal dichalcogenides (particularly tungsten disulfide and molybdenum disulfide) and polymers (particularly PTFE) .

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Lubricants (AREA)

Abstract

L'invention concerne un matériau composite à base d'une matrice polymère/métal de transition qui possède des caractéristiques de durabilité, de réduction des frictions et de résistance à la corrosion et à l'usure, et pouvant être utilisé sous forme de poudre ou de liquide ou pouvant être lié à une surface désirée à température ambiante. Les composants spécifiques sont les dichalcogénures de métaux de transition (TMD) tels que les disulfures de tungstène et de molybdène, et un polymère tel que le polytétrafluoroéthylène (PTFE). Cette invention permet d'associer la chimie organique (PTFE) et la chimie inorganique (TMD) et crée une interaction synergique qui optimalise les propriétés de réduction de friction du PTFE avec les propriétés semblables de réduction de friction des TMD choisis et, la résistance supplémentaire à l'usure des TMD et la tendance naturelle à former une liaison physique tenace au niveau de la molécule. L'invention comprend un mélange de PTFE et de TMD (en particulier le disulfure de tungstène et le disulfure de molybdène) qui peuvent être appliqués sur un substrat en utilisant divers mécanismes et façons de former une couche lubrifiante et résistante à l'usure allant de 0,5 micron à 60 microns d'épaisseur.
PCT/US1994/014882 1994-12-28 1994-12-28 LUBRIFIANT A BASE D'UNE MATRICE POLYMERE/METAl DE TRANSITION ET PROCEDE D'UTILISATION WO1996020083A1 (fr)

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AU14455/95A AU1445595A (en) 1994-12-28 1994-12-28 Transition metal/polymer matrix lubricant and method of use
PCT/US1994/014882 WO1996020083A1 (fr) 1994-12-28 1994-12-28 LUBRIFIANT A BASE D'UNE MATRICE POLYMERE/METAl DE TRANSITION ET PROCEDE D'UTILISATION

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FR2892174A1 (fr) * 2005-10-14 2007-04-20 Vallourec Mannesmann Oil Gas F Element filete tubulaire muni d'un revetement protecteur sec
WO2008125740A1 (fr) * 2007-04-13 2008-10-23 Vallourec Mannesmann Oil & Gas France Element filete tubulaire muni d'un revetement protecteur sec
WO2012008890A1 (fr) * 2010-07-16 2012-01-19 Applied Nano Surfaces Sweden Ab Procédé permettant d'obtenir une surface à faible coefficient de frottement
EP4060093A1 (fr) 2021-03-17 2022-09-21 Rosenberger Hochfrequenztechnik GmbH & Co. KG Surfaces tribologiquement améliorées pour contacts électriques

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FR2892174A1 (fr) * 2005-10-14 2007-04-20 Vallourec Mannesmann Oil Gas F Element filete tubulaire muni d'un revetement protecteur sec
WO2007042231A3 (fr) * 2005-10-14 2007-06-14 Vallourec Mannesmann Oil & Gas Element filete tubulaire dote d'un revetement protecteur sec
EA013760B1 (ru) * 2005-10-14 2010-06-30 Валлурек Маннесманн Ойл Энд Гэс Франс Трубчатый резьбовый элемент, снабженный сухим защитным покрытием
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WO2012008890A1 (fr) * 2010-07-16 2012-01-19 Applied Nano Surfaces Sweden Ab Procédé permettant d'obtenir une surface à faible coefficient de frottement
CN103097578A (zh) * 2010-07-16 2013-05-08 瑞典应用纳米表面公司 用于提供低摩擦表面的方法
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EP4060093A1 (fr) 2021-03-17 2022-09-21 Rosenberger Hochfrequenztechnik GmbH & Co. KG Surfaces tribologiquement améliorées pour contacts électriques
WO2022195038A1 (fr) 2021-03-17 2022-09-22 Rosenberger Hochfrequenztechnik Gmbh & Co. Kg Surfaces améliorées de manière tribologique pour contacts électriques

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