WO2009013714A1 - Matière pouvant être brasée à l'air - Google Patents

Matière pouvant être brasée à l'air Download PDF

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Publication number
WO2009013714A1
WO2009013714A1 PCT/IB2008/052954 IB2008052954W WO2009013714A1 WO 2009013714 A1 WO2009013714 A1 WO 2009013714A1 IB 2008052954 W IB2008052954 W IB 2008052954W WO 2009013714 A1 WO2009013714 A1 WO 2009013714A1
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WO
WIPO (PCT)
Prior art keywords
braze
diamond
superhard
particle
layer
Prior art date
Application number
PCT/IB2008/052954
Other languages
English (en)
Inventor
David Patrick Egan
Original Assignee
Element Six Limited
Donald, Heather June
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.)
Filing date
Publication date
Application filed by Element Six Limited, Donald, Heather June filed Critical Element Six Limited
Publication of WO2009013714A1 publication Critical patent/WO2009013714A1/fr

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
    • C04B41/45—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements
    • C04B41/52—Multiple coating or impregnating multiple coating or impregnating with the same composition or with compositions only differing in the concentration of the constituents, is classified as single coating or impregnation
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
    • C04B41/009—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone characterised by the material treated
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
    • C04B41/45—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements
    • C04B41/4584—Coating or impregnating of particulate or fibrous ceramic material
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
    • C04B41/80—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone of only ceramics
    • C04B41/81—Coating or impregnation
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
    • C04B41/80—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone of only ceramics
    • C04B41/81—Coating or impregnation
    • C04B41/89—Coating or impregnation for obtaining at least two superposed coatings having different compositions
    • C04B41/90—Coating or impregnation for obtaining at least two superposed coatings having different compositions at least one coating being a metal
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K3/00—Materials not provided for elsewhere
    • C09K3/14—Anti-slip materials; Abrasives
    • C09K3/1436—Composite particles, e.g. coated particles
    • C09K3/1445—Composite particles, e.g. coated particles the coating consisting exclusively of metals

Definitions

  • the present invention relates to air brazeable material.
  • the present invention relates to air braze material including a braze alloy and air brazeable coated and/or encapsulated superhard material.
  • WO2004074534 (Hendrik, Baker Hughes Inc., 2004) describes a method of forming and applying a diamond coating or other superhard coating to a tool, most preferably a downhole tool, such as a drill bit.
  • a superhard powder is placed into slurry and then formed, preferably using a tape casting method, into a green tape that is capable of being handled and applied to a substrate.
  • the tape is then applied to a desired surface on a part or tool, being affixed initially thereto by a suitable braze.
  • the tape is then cured to the surface using a thermal cycle that transforms the tape into a solid diamond composite coating.
  • diamond tape is combined with ceramic tape having electronic circuitry components integrated therein.
  • EP1645365 (Sung, Sung, 2006) describes a diamond tool with diamond bonded chemically by a braze that contains either Cr, Mn, SI or Al or mixtures or alloys thereof.
  • the diamond tool is made by infiltrating the braze into a matrix metal that contains diamond in either form of grits or polycrystalline bodies.
  • US2004107581 (Reade, 2004) relates to a diamond tipped indenting tool for marking the surface of metal parts.
  • the indenting tool comprises a shank having a tip end and a diamond affixed to the tip end by a braze material.
  • the braze material preferably comprises a braze alloy which wets both the diamond and the material forming the shank.
  • the diamond forms the point of the tool and is preferably a high quality single crystal diamond.
  • CN1528565 (Hongjun et al., Nanjing Aeronautical and Aeros, 2004) is a method to make single-layer braze-welding diamond abrasive-consolidated tool with optimized relief, including the synthetical testing method of braze-welding diamond abrasive as well as interface physico-chemical structure and nature, the experimental optimizing method of diamond abrasive braze welding technique, the high temperature braze welding technique, the tool relief optimizing method and the diamond abrasive arrangement optimizing method. It has two advantages of high combined control strength and optimum relief, having shown unique and super-excellent processing performance in processing high-efficiency heavy loads of high hard crisp material.
  • US2004245022 (Izaguirre et al., 2004) provides a bit body formed of a mixture of matrix material and superabrasive powder and including pockets lined with superabrasive-free matrix material, and a method for forming the same.
  • the pockets are shaped to receive cutting elements therein.
  • the superabrasive-free matrix material enhances braze strength when a cutting element is brazed to surfaces of the pocket.
  • the method for forming the drill bit body includes providing a mold and displacements. The displacements are coated with a mixture of superabrasive free matrix-material and an organic binder.
  • the mold is packed with a mixture of matrix material and superabrasive powder and the arrangement heated to form a solid drill bit body.
  • the superabrasive material may be diamond, polycrystalline cubic boron nitride, SiC or TiB2 in exemplary embodiments.
  • US2002077054 (Sung, 2002) provides a superabrasive tools and methods for making the same.
  • superabrasive particles are chemically bonded to a matrix support material according to a predetermined pattern by a braze alloy that contains Cr, Mn, Si, or Al or mixtures thereof.
  • JP2000288942 (Naoki, Noritake Diamond Ind, 2000) describes the following problem: To improve the retaining force of an abrasive grain by arranging an abrasive grain having a recessed part or through-hole formed simply or in combination on the surface on a base metal, and filling a brazing material containing an active metal to the recessed part or through-hole of the abrasive grain to graze the abrasive grain on the metal base.
  • SOLUTION A groove 3 is formed on the surface of a diamond abrasive grain 1 , and a through-hole 2 is formed in the inner part thereof.
  • the groove 3 and through-hole 2 are preliminarily formed on the diamond abrasive grain 1 in this way, whereby the brazing material 14 is filled in the groove 3 and through- hole 2 in the brazing of the diamond abrasive grain 1 to the base metal periphery 11a to increase the contact area of the diamond abrasive grain 1 with the brazing material 4, so that the abrasive grain retaining force can be enhanced
  • a wire saw has a small diameter metal wire and a layer of abrasive grains firmly affixed to the wire surface by a brazed or soldered active metal bond.
  • the grains are present in a single layer.
  • the grains are disposed on the surface of the wire in a preselected surface distribution.
  • the wire saw can be made by a completely continuous process involving coating the wire with a paste of metal bond powder components combined with a fugitive liquid binder component. Abrasive grains are deposited into a layer of the paste. Thereafter, the bond composition is fused at a elevated temperature to braze the grains to the wire.
  • the abrasive grains can include superabrasive materials, such as diamond and cubic boron nitride. Accordingly, the novel wire saw is suitable for cutting ultra thin wafers ceramic wafers with minimum waste of the work piece.
  • the present invention is directed at a rotary dressing tool having a rigid, discshaped core (10) and an abrasive rim (4) around at least one surface of the periphery of the core, the core (10) and the abrasive rim (4) being oriented in a direction orthogonal to the axis of rotation of the tool, wherein the abrasive rim (4) comprises a plurality of abrasive inserts mechanically fastened to the periphery of the core, and the abrasive inserts comprise an abrasive component bonded to a backing element (13) by means of an active braze (15), and the abrasive component (15) is selected from the group consisting of diamond grains (8) arranged in a single layer and diamond film inserts (14), and combinations thereof.
  • the diamond particles are coated with a material selected from the group consisting of tungsten, molybdenum, chromium, nickel, iron, cobalt, palladium, tungsten carbide, molybdenum carbide, chromium carbide and iron carbide.
  • the carbide particles are selected from the group consisting of tungsten carbide, molybdenum carbide and chromium carbide.
  • a process for fabricating a composite material such as that having high thermal conductivity and having specific application as a heat sink or heat spreader for high density integrated circuits.
  • the composite material produced by this process has a thermal conductivity between that of diamond and copper, and basically consists of coated diamond particles dispersed in a high conductivity metal, such as copper.
  • the composite material can be fabricated in small or relatively large sizes using inexpensive materials.
  • a diamond article for example, a sheet-form diamond tool insert brazable in air.
  • the diamond sheet has a dual layer coating, a WTi bonding layer and a protective braze compatible overcoat, such as a Ag overcoat.
  • the interface between the WTi layer and the diamond substrate includes sufficient metal carbide component to provide adhesion.
  • the dual-coated diamond insert may be air brazed to a tool substrate in a manufacturing environment using a standard braze without a vacuum furnace or special atmosphere.
  • a method for manufacturing the diamond insert is a!so disclosed.
  • the diamond insert is coated and heat treated in an oxygen- and nitrogen-free atmosphere to create metal carbide at the diamond- coating interface.
  • EP0716159 (lacovangelo, GE, 1996)
  • Tool inserts are produced that can be brazed in air at temperatures as low as 700 DEG C.
  • the tool compact such as a polycrystalline diamond compact or a cubic boron nitride compact, has a multilayer coating comprising a metal bonding layer and a protective layer. Once coated with the bonding layer and the protective layer, the tool insert can be air brazed to a tool support in a manufacturing environment using a standard braze without a vacuum furnace or special atmosphere. A method for manufacturing the tool insert is also disclosed.
  • a diamond article for example, a sheet-form diamond tool insert brazable in air.
  • the diamond sheet has a dual layer coating, a chromium bonding layer and a protective braze compatible overcoat, such as a Ni overcoat.
  • the interface between the Cr layer and the diamond substrate includes sufficient metal carbide component to provide adhesion.
  • the dual-coated diamond insert may be air brazed to a tool substrate in a manufacturing environment using a standard braze without a vacuum furnace or special atmosphere.
  • a method for manufacturing the diamond insert comprises the steps of depositing a chromium metal layer on a diamond substrate, depositing a substantially non-oxidizable protective layer on the metal layer and heating the dual-coated diamond article at a temperature for a sufficient time.
  • the diamond insert is coated and heat treated in an oxygen- and nitrogen-free atmosphere to create metal carbide at the diamond-coating interface.
  • a diamond article for example, a sheet-form diamond tool insert brazable in air.
  • the diamond sheet has a dual layer coating, a WTi bonding layer and a protective braze compatible overcoat, such as a Ag overcoat.
  • the interface between the WTi layer and the diamond substrate includes sufficient metal carbide component to provide adhesion.
  • the dual-coated diamond insert may be air brazed to a tool substrate in a manufacturing environment using a standard braze without a vacuum furnace or special atmosphere.
  • a method for manufacturing the diamond insert is also disclosed. The diamond insert is coated and heat treated in an oxygen- and nitrogen-free atmosphere to create metal carbide at the diamond- coating interface.
  • a method of making a diamond cutting and abrading tool includes the following steps: (A) Mixing a carbide former with a braze which alloys with the carbide forming substance and a temporary binder to provide a coating material; (B) Applying said coating material to a tool substrate (16); (C) Applying at least a monolayer of diamond particles (14) thereover; and (D) Heating the product of step (C) at a temperature sufficient to initially form a metal carbide coating (10a) on the diamond and thereafter to braze the carbide coated diamond to the tool substrate.
  • a tool comprising a fully dense sheet of diamond brazed to a substrate.
  • the diamond sheet is manufactured by a chemical vapor deposition process and has a thickness of at least about 0.1 mm.
  • the braze material is preferably a carbide-former.
  • a multilayer brazeable metallization structure for diamond components and method for producing it are described.
  • the brazeable metallization finds particular application for the attachment of diamond components such as heat spreaders in electronic packages that incorporate high power semiconductor devices.
  • a diamond component is provided with a multilayer coating of metals including a first layer of chromium for adhesion, a second barrier layer of a refractory metal for a barrier that may be alloyed with chromium, and a top layer of copper, silver or gold for wetting. This top layer is thick (greater than 5 microns), without sacrificing resistance to delamination, particularly at brazing conditions.
  • a braze material comprising:
  • a coated superhard particle comprising a superhard particle; a primary layer of a carbided carbide forming element, for example TiC and a secondary layer of a high melting point metal selected from W, Mo, Cr, Ni, Ta, Au, Pt, Pd, Nb or any combination / alloy thereof.
  • a primary layer of a carbided carbide forming element for example TiC
  • a secondary layer of a high melting point metal selected from W, Mo, Cr, Ni, Ta, Au, Pt, Pd, Nb or any combination / alloy thereof.
  • the coated superhard particle may also include an overcoat of Ag, Ni, Cu, Au, Pd, Pt, Rh, Os, Ir, Re, any combination / alloy thereof and alloys such as bronze (Cu/Sn), silver/bronze and silver/tin.
  • the particle is preferably disposed/dispersed within the braze metal system.
  • the braze material as hereinbefore described may be a stock keeping unit, per se.
  • the braze material as hereinbefore described preferably exists in mixture before application to a substrate.
  • a braze metal system includes a braze alloy and where needed, any compatible fluxes and/or additives. Where the system is in paste form, it may also include binders and solvents.
  • the braze alloy is selected from the following:
  • Silver Brazing Alloys Silver-flo Cadmium Free Range (Registered
  • the braze material is fashioned into:
  • the superhard material is selected from diamond, cubic boron nitride, wurtzitic boron nitride, a carbide, oxide or suicide, Si 3 N 4 , SiC, AI 2 O 3 , AIC, SiO 2 and/or clusters of any of the above. Most preferably the superhard material is diamond.
  • the diamond may be natural or synthetic. Synthetic diamond may be synthesized by chemical vapour deposition, High Pressure High Temperature (HPHT), explosion or shock wave techniques.
  • a layer of braze metal system encapsulated on the particle wherein the encapsulated superhard particle includes a plurality of encapsulation layers and/or the encapsulation layer(s) include(s) a discrete or continuous gradient.
  • the coating may be that described in the first aspect of the present invention or alternatively it may be any coating, an example of which includes that described in PCT/IB2005/000056 (TiC with W).
  • the layer of braze metal system may also be applied directly to an uncoated superhard particle. Encapsulation may be achieved by any known method in the art including by a fluidised bed, pan rotating, shovel rotor or any combination thereof.
  • Encapsulated particles such as abrasive grit
  • abrasive grit are particles that have been encapsulated within an envelope comprising a mass of particulate materials, such as metal, metaf alloy, ceramic and/or cermet powders or combinations thereof, by any process involving the use of a distinct binder to hold the particulate material together.
  • the binder is an organic material. The binder may be subsequently removed and the particulate material can be partially or fully sintered.
  • Coated particles can be described as having a core comprising at least one said particle which is fully or partially surrounded by a layer or layers of material either physically or chemically bonded to the surface of the particle.
  • the coating differs to encapsulation in that the process for producing the coating does not rely on a binder material holding particulate material together immediately after deposition.
  • the coating may either completely or partially cover the surface of the core particle(s).
  • Processes for producing coatings include: chemical vapour deposition (CVD), physical vapour deposition (PVD), other equivalent hot or cold processes, plating, sol-gel or ceramic coatings produced using polymer pre-cursors.
  • a method of brazing superhard particulate material to a surface comprising the step of contacting the surface with braze material according to the present invention and applying sufficient heat to braze the superhard particulate material to the surface.
  • a braze material comprising:
  • braze material • an encapsulated superhard particle and/or coated superhard particle wherein the braze material is fashioned to a strip, a paste or a powder.
  • braze material according to the first aspect to the present invention in any one or more of the following application areas:
  • Example 1 TiC/W/Ag coated diamond in a braze strip and brazed in air to a carbide cylinder
  • Example 2 TiC/W/Ag coated diamond, encapsulated with a braze alloy and brazed in air to a carbide cylinder
  • 1 ,000 cts of diamond grit 20/25 US mesh size (0.81 mm) was coated as per example 1.
  • the coated diamond was then encapsulated using a fluidised bed and rotating pan system with a first encapsulation layer of braze alloy (Johnson Matthey's Argobraze 632 (RTM)) and then a second encapsulation layer of a higher melting point Fe metal.
  • the first encapsulation layer was built up to a diameter of 1 mm and the second encapsulation layer to a diameter of 1.5 mm.
  • Example 4 TiC/W/Ag coated diamond, encapsulated with a first hard layer of W powder and second layer of braze alloy and brazed in air to a carbide cylinder
  • 2,000 cts of diamond grit 40/45 US mesh size (0.4 mm) was coated as per example 1.
  • the coated diamond was then encapsulated using a fluidised bed and rotating pan process with a first encapsulation layer of W metal powder and a second encapsulation layer of a braze alloy (Bronze powder 80/20).
  • the first encapsulation layer was built up to a diameter of 0.8 mm and the second encapsulation layer to a diameter of 1.0 mm.
  • the encapsulated grit was then placed on the surface of a tungsten carbide cylinder and heated using a high frequency induction heater to firstly burn off any binder or solvents and secondly to braze the diamond to the surface of the carbide cylinder.
  • a uniform distribution of the coated diamond with a wear protection zone of W around the diamond was produced by the first encapsulation layer and held in place by the second encapsulation layer by infiltrating the W and bonding the diamond to the carbide cylinder.
  • 2,000 cts of diamond grit 40/45 US mesh size (0.4 mm) was coated as per example 1.
  • the coated diamond was then encapsulated using a fluidised bed and rotating pan system with a layer of braze alloy (Johnson Matthey's Argobraze 632 (RTM)).
  • the encapsulated particles were built up to a diameter of 0.9 mm.
  • the encapsulated grit was then manufactured into a strip using a tape casting method. In this technique, the coated diamond was mixed with Fe, solvent and an organic binder. The diamond concentration was 100.
  • By applying the tape casting method a 300 mm X 70 mm X 1 mm strip was produced. This strip was then cut into a 1cm diameter disks.
  • a flux was placed onto a carbide cylinder onto which the 1cm diameter disk was then placed. Additional flux was placed on the disk and the arrangement was heated slowly using an induction coil to initially burn off binder and then braze the diamond to the surface of the carbide cylinder. This resulted in an even distribution of the diamond on the surface of the carbide separated by the iron of the strip. The first encapsulation layer infiltrated the iron strip in the vicinity of the diamond and bonded the diamond to the carbide cylinder.
  • 2,000 cts of diamond grit 40/45 US mesh size (0.4 mm) was coated as per example 1.
  • the coated diamond was then mixed with a braze system consisting of Johnson Matthey's Argobraze 56 (RTM) braze paste.
  • the diamond concentration was 100.
  • the braze paste / diamond mixture was then placed on a steel plate. The arrangement was heated slowly using an induction coil to initially burn off binder and then braze the diamond to the surface of the steel plate.
  • Example 7 TiC/W/Ag coated diamond, encapsulated with Fe & manufactured into paste and brazed in air to a steel plate
  • Example 8 TiC/W/Ag coated diamond, encapsulated with hard W layer & manufactured into paste and brazed in air to a steel plate
  • 2,000 cts of diamond grit 50/60 US mesh size (0.28 mm) was coated as per example 1.
  • the coated diamond was then encapsulated using a fluidised bed and rotating pan system with a layer of W metal powder.
  • the encapsulated particles were built up to a diameter of 0.5 mm.
  • the coated diamond was then mixed with a braze system consisting of Johnson Matthey's Argobraze 56 (RTM) braze paste.
  • the diamond concentration was 100.
  • the braze paste / diamond mixture was then placed on a steel plate. The arrangement was heated slowly using an induction coil to initially burn off binder and then braze the diamond to the surface of the steel plate.
  • a uniform distribution of the coated diamond with a wear protection zone of W around the diamond was produced by the first encapsulation layer and held in place by the second encapsulation layer by infiltrating the W and bonding the diamond to the carbide cyiinder.
  • Example 9 Uncoated diamond encapsulated with hard W layer & encapsulated with active braze (TiCuSiI) & brazed in vacuum furnace
  • 2,000 cts of diamond grit 50/60 US mesh size (0.28 mm) was encapsulated using a fluidised bed process with a first encapsulation layer of W metal powder and a second encapsulation layer consisting of TiCuSiI active braze powder.
  • the first encapsulation layer was built up to a diameter of 0.5 mm and the second encapsulation layer to a diameter of 0.7 mm.
  • the encapsulated grit was then placed on the surface of a steel plate and heated under high vacuum to braze the diamond to the surface of the steel plate.
  • 2,000 cts of diamond grit 50/60 US mesh size (0.28 mm) was first coated with a primary coating consisting of a 0.6 urn TiC layer applied by chemical vapour deposition (CVD) and a secondary coating consisting of a 0.4 urn W layer applied by PVD.
  • the coated diamond was then encapsulated using a fluidised bed and rotating pan system with a layer of Fe powder. The encapsulated particles were built up to a diameter of 0.5 mm.
  • the coated/encapsulated diamond was then manufactured into a strip using a tape casting method. In this technique, the coated/encapsulated diamond was mixed with a braze system consisting of Johnson Matthey's Argobraze 632 (RTM) braze powder. The diamond concentration was 100.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Structural Engineering (AREA)
  • Composite Materials (AREA)
  • Polishing Bodies And Polishing Tools (AREA)

Abstract

L'invention concerne une matière de brasage comprenant un système de métaux de brasage ; et une particule extra-dure enrobée comprenant une particule extra-dure ; une première couche d'un élément formant un carbure ; une deuxième couche d'un métal de point de fusion élevé sélectionné parmi W, Mo, Cr, Ni, Ta, Au, Pt, Pd, Nb ou n'importe quel alliage/combinaison de ceux-ci ; et un enrobage supérieur de Ag, Ni, Cu, Au, Pd, Pt, Rh, Os, Ir, Re, n'importe quel alliage/combinaison de ceux-ci et d'alliages dont le bronze (Cu/Sn), des alliages d'argent/bronze et des alliages d'argent/étain. L'invention concerne en outre une particule extra-dure encapsulée comprenant une particule extra-dure et facultativement un revêtement appliqué sur la particule extra-dure et une couche de système de métaux de brasage encapsulant la particule, caractérisée en ce que la particule extra-dure encapsulée comprend une pluralité de couches d'encapsulation et/ou en ce que la ou les couches d'encapsulation comprennent un gradient discret ou continu.
PCT/IB2008/052954 2007-07-23 2008-07-23 Matière pouvant être brasée à l'air WO2009013714A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ZA2007/06075 2007-07-23
ZA200706075 2007-07-23

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WO2009013714A1 true WO2009013714A1 (fr) 2009-01-29

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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012143503A1 (fr) * 2011-04-21 2012-10-26 H.C. Starck Gmbh Granulés pour fabriquer des éléments composites par moulage par injection
RU2547974C2 (ru) * 2013-07-16 2015-04-10 Денис Анатольевич Романов СПОСОБ ЭЛЕКТРОВЗРЫВНОГО НАПЫЛЕНИЯ КОМПОЗИЦИОННЫХ ИЗНОСОСТОЙКИХ ПОКРЫТИЙ СИСТЕМЫ TiB2-MO НА ПОВЕРХНОСТИ ТРЕНИЯ
GB2534659A (en) * 2014-12-01 2016-08-03 Element Six Tech Ltd Bonding scheme for diamond components which has low thermal barrier resistance in high power density applications
CN107326364A (zh) * 2017-06-02 2017-11-07 泉州众志金刚石工具有限公司 一种Cu‑Sn‑Ti的金刚石钎焊涂层及其制备方法
RU2686093C1 (ru) * 2018-06-29 2019-04-24 Денис Анатольевич Романов Способ нанесения биоинертных покрытий на основе ниобия на титановые имплантаты
RU2686092C1 (ru) * 2018-06-29 2019-04-24 Денис Анатольевич Романов Способ нанесения биоинертных покрытий на основе циркония на титановые имплантаты
CN112033734A (zh) * 2020-09-16 2020-12-04 贵州工程应用技术学院 一种高精度在役混凝土强度快速检测设备
RU210834U1 (ru) * 2021-12-27 2022-05-06 Федеральное государственное бюджетное образовательное учреждение высшего образования "Сибирский государственный индустриальный университет", ФГБОУ ВО "СибГИУ" Высоковольтный разъединитель

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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WO2005078045A1 (fr) * 2004-01-15 2005-08-25 Element Six Limited Procede de production de revetements abrasifs
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WO2012143503A1 (fr) * 2011-04-21 2012-10-26 H.C. Starck Gmbh Granulés pour fabriquer des éléments composites par moulage par injection
RU2547974C2 (ru) * 2013-07-16 2015-04-10 Денис Анатольевич Романов СПОСОБ ЭЛЕКТРОВЗРЫВНОГО НАПЫЛЕНИЯ КОМПОЗИЦИОННЫХ ИЗНОСОСТОЙКИХ ПОКРЫТИЙ СИСТЕМЫ TiB2-MO НА ПОВЕРХНОСТИ ТРЕНИЯ
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CN107326364A (zh) * 2017-06-02 2017-11-07 泉州众志金刚石工具有限公司 一种Cu‑Sn‑Ti的金刚石钎焊涂层及其制备方法
CN107326364B (zh) * 2017-06-02 2023-08-11 泉州众志金刚石工具有限公司 一种Cu-Sn-Ti的金刚石钎焊涂层及其制备方法
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RU2686092C1 (ru) * 2018-06-29 2019-04-24 Денис Анатольевич Романов Способ нанесения биоинертных покрытий на основе циркония на титановые имплантаты
CN112033734A (zh) * 2020-09-16 2020-12-04 贵州工程应用技术学院 一种高精度在役混凝土强度快速检测设备
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RU210834U1 (ru) * 2021-12-27 2022-05-06 Федеральное государственное бюджетное образовательное учреждение высшего образования "Сибирский государственный индустриальный университет", ФГБОУ ВО "СибГИУ" Высоковольтный разъединитель

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