CA2007561A1 - Procede pour le durcissement des outils diamantes - Google Patents

Procede pour le durcissement des outils diamantes

Info

Publication number
CA2007561A1
CA2007561A1 CA2007561A CA2007561A CA2007561A1 CA 2007561 A1 CA2007561 A1 CA 2007561A1 CA 2007561 A CA2007561 A CA 2007561A CA 2007561 A CA2007561 A CA 2007561A CA 2007561 A1 CA2007561 A1 CA 2007561A1
Authority
CA
Canada
Prior art keywords
diamond
particles
toughening
nondiamond
cemented
Prior art date
Legal status (The legal status 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 status listed.)
Granted
Application number
CA2007561A
Other languages
English (en)
Other versions
CA2007561C (fr
Inventor
Robert Corbly Mccune, Jr.
William R. Drawl
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ford Motor Company of Canada Ltd
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of CA2007561A1 publication Critical patent/CA2007561A1/fr
Application granted granted Critical
Publication of CA2007561C publication Critical patent/CA2007561C/fr
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C23COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23CCOATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C16/00Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes
    • C23C16/22Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes characterised by the deposition of inorganic material, other than metallic material
    • C23C16/26Deposition of carbon only
    • C23C16/27Diamond only
    • C23C16/278Diamond only doping or introduction of a secondary phase in the diamond
    • CCHEMISTRY; METALLURGY
    • C23COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23CCOATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C14/00Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
    • C23C14/06Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the coating material
    • CCHEMISTRY; METALLURGY
    • C23COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23CCOATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C16/00Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes
    • C23C16/22Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes characterised by the deposition of inorganic material, other than metallic material
    • C23C16/26Deposition of carbon only
    • C23C16/27Diamond only
    • C23C16/271Diamond only using hot filaments
    • CCHEMISTRY; METALLURGY
    • C23COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23CCOATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C16/00Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes
    • C23C16/22Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes characterised by the deposition of inorganic material, other than metallic material
    • C23C16/26Deposition of carbon only
    • C23C16/27Diamond only
    • C23C16/274Diamond only using microwave discharges

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Chemical Vapour Deposition (AREA)
  • Crystals, And After-Treatments Of Crystals (AREA)
  • Cutting Tools, Boring Holders, And Turrets (AREA)
CA002007561A 1989-01-12 1990-01-11 Procede pour le durcissement des outils diamantes Expired - Fee Related CA2007561C (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US296,469 1989-01-12
US07/296,469 US4988421A (en) 1989-01-12 1989-01-12 Method of toughening diamond coated tools

Publications (2)

Publication Number Publication Date
CA2007561A1 true CA2007561A1 (fr) 1990-07-12
CA2007561C CA2007561C (fr) 1999-12-07

Family

ID=23142135

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002007561A Expired - Fee Related CA2007561C (fr) 1989-01-12 1990-01-11 Procede pour le durcissement des outils diamantes

Country Status (2)

Country Link
US (1) US4988421A (fr)
CA (1) CA2007561C (fr)

Families Citing this family (89)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5271971A (en) * 1987-03-30 1993-12-21 Crystallume Microwave plasma CVD method for coating a substrate with high thermal-conductivity diamond material
US5273825A (en) * 1987-03-30 1993-12-28 Crystallume Article comprising regions of high thermal conductivity diamond on substrates
US5270114A (en) * 1987-03-30 1993-12-14 Crystallume High thermal conductivity diamond/non-diamond composite materials
US5284709A (en) * 1987-03-30 1994-02-08 Crystallume Diamond materials with enhanced heat conductivity
US5413772A (en) * 1987-03-30 1995-05-09 Crystallume Diamond film and solid particle composite structure and methods for fabricating same
US5227196A (en) * 1989-02-16 1993-07-13 Semiconductor Energy Laboratory Co., Ltd. Method of forming a carbon film on a substrate made of an oxide material
JP2837700B2 (ja) * 1989-08-23 1998-12-16 ティーディーケイ株式会社 ダイヤモンド様薄膜を形成する方法
DE3935865C1 (fr) * 1989-10-27 1990-10-04 Philips Patentverwaltung Gmbh, 2000 Hamburg, De
US5039755A (en) * 1990-05-29 1991-08-13 Shell Oil Company Selective hydrogenation of conjugated diolefin polymers
SE9002136D0 (sv) * 1990-06-15 1990-06-15 Sandvik Ab Cement carbide body for rock drilling, mineral cutting and highway engineering
US5260106A (en) * 1990-08-03 1993-11-09 Fujitsu Limited Method for forming diamond films by plasma jet CVD
US5492770A (en) * 1990-08-03 1996-02-20 Fujitsu Limited Method and apparatus for vapor deposition of diamond film
CA2044543C (fr) * 1990-08-10 1999-12-14 Louis Kimball Bigelow Pellicule multicouche ultra-dure
US5164220A (en) * 1990-10-29 1992-11-17 Diamond Technologies Company Method for treating diamonds to produce bondable diamonds for depositing same on a substrate
US5246746A (en) * 1991-04-26 1993-09-21 Michalske Terry A Method for forming hermetic coatings for optical fibers
US5169676A (en) * 1991-05-16 1992-12-08 The United States Of America As Represented By The Secretary Of The Navy Control of crystallite size in diamond film chemical vapor deposition
US5800879A (en) * 1991-05-16 1998-09-01 Us Navy Deposition of high quality diamond film on refractory nitride
US5147687A (en) * 1991-05-22 1992-09-15 Diamonex, Inc. Hot filament CVD of thick, adherent and coherent polycrystalline diamond films
US5411758A (en) * 1991-10-09 1995-05-02 Norton Company Method of making synthetic diamond wear component
ZA928617B (en) * 1991-11-15 1993-05-11 Gillette Co Shaving system.
US5669144A (en) * 1991-11-15 1997-09-23 The Gillette Company Razor blade technology
US5260141A (en) * 1991-11-29 1993-11-09 Regents Of The University Of Minnesota Diamond coated products
US5665430A (en) * 1992-09-30 1997-09-09 The United States Of America As Represented By The Secretary Of The Navy Chemical vapor deposition method for depositing diamond using a high temperature vacuum substrate mount
WO1994013852A1 (fr) * 1992-12-08 1994-06-23 Osaka Diamond Industrial Co., Ltd. Materiau recouvert d'un film ultra-dure et son procede de production
US5249554A (en) * 1993-01-08 1993-10-05 Ford Motor Company Powertrain component with adherent film having a graded composition
US5635254A (en) * 1993-01-12 1997-06-03 Martin Marietta Energy Systems, Inc. Plasma spraying method for forming diamond and diamond-like coatings
US5639551A (en) * 1993-02-10 1997-06-17 California Institute Of Technology Low pressure growth of cubic boron nitride films
KR100374975B1 (ko) * 1993-10-29 2003-07-22 어낵시스 발처스 악티엔게젤샤프트 코팅된물체와그의제조방법및사용법
FR2712285B1 (fr) * 1993-11-12 1995-12-22 Lorraine Carbone Traitement de surface de matériau carbone pour rendre adhérent un dépôt ultérieur de diamant et pièces revêtues de diamant obtenues.
US5447208A (en) * 1993-11-22 1995-09-05 Baker Hughes Incorporated Superhard cutting element having reduced surface roughness and method of modifying
US5514242A (en) * 1993-12-30 1996-05-07 Saint Gobain/Norton Industrial Ceramics Corporation Method of forming a heat-sinked electronic component
US6087025A (en) * 1994-03-29 2000-07-11 Southwest Research Institute Application of diamond-like carbon coatings to cutting surfaces of metal cutting tools
US5725573A (en) * 1994-03-29 1998-03-10 Southwest Research Institute Medical implants made of metal alloys bearing cohesive diamond like carbon coatings
US5507987A (en) * 1994-04-28 1996-04-16 Saint Gobain/Norton Industrial Ceramics Corp. Method of making a free-standing diamond film with reduced bowing
US5560839A (en) * 1994-06-27 1996-10-01 Valenite Inc. Methods of preparing cemented metal carbide substrates for deposition of adherent diamond coatings and products made therefrom
US5587124A (en) * 1994-07-05 1996-12-24 Meroth; John Method of making synthetic diamond film with reduced bowing
US5984905A (en) 1994-07-11 1999-11-16 Southwest Research Institute Non-irritating antimicrobial coating for medical implants and a process for preparing same
US5453303A (en) * 1994-07-22 1995-09-26 The United States Of America As Represented By The United States Department Of Energy Low substrate temperature deposition of diamond coatings derived from glassy carbon
US5510193A (en) * 1994-10-13 1996-04-23 General Electric Company Supported polycrystalline diamond compact having a cubic boron nitride interlayer for improved physical properties
US5976206A (en) * 1995-05-19 1999-11-02 Saint-Gobain/Norton Industrial Ceramics Corporation Method of making white diamond film
US5891522A (en) * 1995-05-24 1999-04-06 Saint-Gobain Industrial Ceramics, Inc. Composite article with adherent CVD diamond coating and method of making
JP3675577B2 (ja) * 1995-07-05 2005-07-27 日本特殊陶業株式会社 ダイヤモンド被覆物品の製造方法
US5820985A (en) * 1995-12-07 1998-10-13 Baker Hughes Incorporated PDC cutters with improved toughness
US5620745A (en) * 1995-12-19 1997-04-15 Saint Gobain/Norton Industrial Ceramics Corp. Method for coating a substrate with diamond film
AU2074097A (en) * 1996-03-04 1997-09-22 Polar Materials, Inc. Method for bulk coating using a plasma process
US5780119A (en) * 1996-03-20 1998-07-14 Southwest Research Institute Treatments to reduce friction and wear on metal alloy components
AT411070B (de) * 1996-03-25 2003-09-25 Electrovac Verfahren zur herstellung eines substrates mit einer polykristallinen diamantschicht
US5989397A (en) * 1996-11-12 1999-11-23 The United States Of America As Represented By The Secretary Of The Air Force Gradient multilayer film generation process control
JP3555844B2 (ja) * 1999-04-09 2004-08-18 三宅 正二郎 摺動部材およびその製造方法
US6410086B1 (en) 1999-11-26 2002-06-25 Cerel (Ceramic Technologies) Ltd. Method for forming high performance surface coatings and compositions of same
US6814130B2 (en) * 2000-10-13 2004-11-09 Chien-Min Sung Methods of making diamond tools using reverse casting of chemical vapor deposition
US7011134B2 (en) * 2000-10-13 2006-03-14 Chien-Min Sung Casting method for producing surface acoustic wave devices
US7132309B2 (en) 2003-04-22 2006-11-07 Chien-Min Sung Semiconductor-on-diamond devices and methods of forming
EP1571365B1 (fr) * 2001-12-25 2008-01-02 Jtekt Corporation Disque d'embrayage, embrayage à friction et dispositif d'embrayage
JP2003269555A (ja) * 2002-03-19 2003-09-25 Tsubakimoto Chain Co 耐摩耗性テンショナ
JP3961879B2 (ja) * 2002-05-24 2007-08-22 株式会社豊田中央研究所 摩擦クラッチ及び駆動力伝達装置
JP2004084899A (ja) * 2002-08-29 2004-03-18 Toyoda Mach Works Ltd 駆動力伝達装置
JP2004138128A (ja) 2002-10-16 2004-05-13 Nissan Motor Co Ltd 自動車エンジン用摺動部材
US6969198B2 (en) * 2002-11-06 2005-11-29 Nissan Motor Co., Ltd. Low-friction sliding mechanism
US20040187979A1 (en) * 2003-03-31 2004-09-30 Material Technologies, Inc. Cutting tool body having tungsten disulfide coating and method for accomplishing same
JP3891433B2 (ja) * 2003-04-15 2007-03-14 日産自動車株式会社 燃料噴射弁
EP1479946B1 (fr) * 2003-05-23 2012-12-19 Nissan Motor Co., Ltd. Piston pour un moteur à combustion interne
EP1482190B1 (fr) * 2003-05-27 2012-12-05 Nissan Motor Company Limited Elément de roulement
US7048081B2 (en) * 2003-05-28 2006-05-23 Baker Hughes Incorporated Superabrasive cutting element having an asperital cutting face and drill bit so equipped
JP2005008851A (ja) * 2003-05-29 2005-01-13 Nissan Motor Co Ltd 硬質炭素薄膜付き機械加工工具用切削油及び硬質炭素薄膜付き機械加工工具
JP2004360649A (ja) 2003-06-06 2004-12-24 Nissan Motor Co Ltd エンジン用ピストンピン
JP4863152B2 (ja) * 2003-07-31 2012-01-25 日産自動車株式会社 歯車
US8206035B2 (en) * 2003-08-06 2012-06-26 Nissan Motor Co., Ltd. Low-friction sliding mechanism, low-friction agent composition and method of friction reduction
JP4973971B2 (ja) * 2003-08-08 2012-07-11 日産自動車株式会社 摺動部材
JP2005054617A (ja) * 2003-08-08 2005-03-03 Nissan Motor Co Ltd 動弁機構
DE602004008547T2 (de) 2003-08-13 2008-05-21 Nissan Motor Co., Ltd., Yokohama Struktur zur Verbindung von einem Kolben mit einer Kurbelwelle
JP4117553B2 (ja) * 2003-08-13 2008-07-16 日産自動車株式会社 チェーン駆動装置
JP4539205B2 (ja) 2003-08-21 2010-09-08 日産自動車株式会社 冷媒圧縮機
US7771821B2 (en) * 2003-08-21 2010-08-10 Nissan Motor Co., Ltd. Low-friction sliding member and low-friction sliding mechanism using same
EP1508611B1 (fr) * 2003-08-22 2019-04-17 Nissan Motor Co., Ltd. Boîte de vitesse comprenant une composition d`huile de transmission
DE602005005634T2 (de) * 2004-01-15 2009-05-14 Element Six Ltd. Beschichtete schleifmittel
US7846767B1 (en) 2007-09-06 2010-12-07 Chien-Min Sung Semiconductor-on-diamond devices and associated methods
EP2077344B1 (fr) * 2007-12-21 2010-11-03 Condias Gmbh Procédé destiné au dépot d'une couche de diamant sur un substrat de graphite
JP6285858B2 (ja) * 2011-05-27 2018-02-28 ナノメック、インコーポレイテッド 微細構造鋸歯状刃を有するコーティング層
DE102012215191A1 (de) * 2012-03-14 2013-09-19 Friedrich-Alexander-Universität Erlangen-Nürnberg Werkzeug für Ultraschallschweißvorrichtung
US9359213B2 (en) * 2012-06-11 2016-06-07 The Board Of Regents Of The Nevada System Of Higher Education On Behalf Of The University Of Nevada, Las Vegas Plasma treatment to strengthen diamonds
US20130336873A1 (en) * 2012-06-16 2013-12-19 Hitoshi Ishiwata Diamond growth using diamondoids
US10307891B2 (en) 2015-08-12 2019-06-04 Us Synthetic Corporation Attack inserts with differing surface finishes, assemblies, systems including same, and related methods
CN106926148B (zh) * 2017-02-08 2020-07-14 上海交通大学 利用化学气相沉积制备单层金刚石磨料工具的方法
US10900291B2 (en) 2017-09-18 2021-01-26 Us Synthetic Corporation Polycrystalline diamond elements and systems and methods for fabricating the same
JP7162799B2 (ja) * 2018-03-08 2022-10-31 日本アイ・ティ・エフ株式会社 複合被膜および複合被膜の形成方法
CN112142440A (zh) * 2020-09-15 2020-12-29 江汉大学 一种金刚石膜散热片及其制备方法
CN113858036B (zh) * 2021-08-23 2023-04-25 四川纳涂科技有限公司 一种金刚石涂层的硬质合金研磨棒及其制备方法
CN115233164A (zh) * 2022-07-22 2022-10-25 安徽工业大学 一种金刚石增强复合材料的电弧离子镀方法

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4336118A (en) * 1980-03-21 1982-06-22 Battelle Memorial Institute Methods for making deposited films with improved microstructures
US4419202A (en) * 1980-12-22 1983-12-06 The Secretary Of State For Defence In Her Britannic Majesty's Government Of The United Kingdom Of Great Britain And Northern Ireland Metal coatings
US4716083A (en) * 1983-09-23 1987-12-29 Ovonic Synthetic Materials Company Disordered coating
SE442305B (sv) * 1984-06-27 1985-12-16 Santrade Ltd Forfarande for kemisk gasutfellning (cvd) for framstellning av en diamantbelagd sammansatt kropp samt anvendning av kroppen

Also Published As

Publication number Publication date
CA2007561C (fr) 1999-12-07
US4988421A (en) 1991-01-29

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