BE813097A - Procede de revetement d'elements en super-alliage et elements obtenus - Google Patents

Procede de revetement d'elements en super-alliage et elements obtenus

Info

Publication number
BE813097A
BE813097A BE142684A BE142684A BE813097A BE 813097 A BE813097 A BE 813097A BE 142684 A BE142684 A BE 142684A BE 142684 A BE142684 A BE 142684A BE 813097 A BE813097 A BE 813097A
Authority
BE
Belgium
Prior art keywords
elements
super
alloy
coating
elements obtained
Prior art date
Application number
BE142684A
Other languages
English (en)
French (fr)
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 filed Critical
Publication of BE813097A publication Critical patent/BE813097A/xx

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C23—COATING 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
    • C23C—COATING 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
    • C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
    • C23C14/06—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the coating material
    • C23C14/14—Metallic material, boron or silicon
    • C23C14/16—Metallic material, boron or silicon on metallic substrates or on substrates of boron or silicon
    • C—CHEMISTRY; METALLURGY
    • C23—COATING 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
    • C23C—COATING 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
    • C23C10/00—Solid state diffusion of only metal elements or silicon into metallic material surfaces
    • C23C10/02—Pretreatment of the material to be coated
    • C—CHEMISTRY; METALLURGY
    • C23—COATING 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
    • C23C—COATING 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
    • C23C28/00—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D
    • C23C28/02—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D only coatings only including layers of metallic material
    • C23C28/021—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D only coatings only including layers of metallic material including at least one metal alloy layer
    • C—CHEMISTRY; METALLURGY
    • C23—COATING 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
    • C23C—COATING 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
    • C23C28/00—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D
    • C23C28/02—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D only coatings only including layers of metallic material
    • C23C28/023—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D only coatings only including layers of metallic material only coatings of metal elements only
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S428/00—Stock material or miscellaneous articles
    • Y10S428/922—Static electricity metal bleed-off metallic stock
    • Y10S428/923—Physical dimension
    • Y10S428/924—Composite
    • Y10S428/926—Thickness of individual layer specified
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/12—All metal or with adjacent metals
    • Y10T428/12493—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.]
    • Y10T428/12736—Al-base component
    • Y10T428/1275—Next to Group VIII or IB metal-base component
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/12—All metal or with adjacent metals
    • Y10T428/12493—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.]
    • Y10T428/12736—Al-base component
    • Y10T428/1275—Next to Group VIII or IB metal-base component
    • Y10T428/12757—Fe
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/12—All metal or with adjacent metals
    • Y10T428/12493—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.]
    • Y10T428/12771—Transition metal-base component
    • Y10T428/12861—Group VIII or IB metal-base component
    • Y10T428/12931—Co-, Fe-, or Ni-base components, alternative to each other

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Physical Vapour Deposition (AREA)
  • Other Surface Treatments For Metallic Materials (AREA)
  • Turbine Rotor Nozzle Sealing (AREA)
BE142684A 1973-04-02 1974-03-29 Procede de revetement d'elements en super-alliage et elements obtenus BE813097A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US346919A US3873347A (en) 1973-04-02 1973-04-02 Coating system for superalloys

Publications (1)

Publication Number Publication Date
BE813097A true BE813097A (fr) 1974-07-15

Family

ID=23361584

Family Applications (1)

Application Number Title Priority Date Filing Date
BE142684A BE813097A (fr) 1973-04-02 1974-03-29 Procede de revetement d'elements en super-alliage et elements obtenus

Country Status (10)

Country Link
US (2) US3873347A (no)
JP (1) JPS5029436A (no)
BE (1) BE813097A (no)
DE (1) DE2414992A1 (no)
FR (1) FR2223478B1 (no)
GB (1) GB1460317A (no)
IL (1) IL43899A0 (no)
IT (1) IT1005893B (no)
NL (1) NL7400369A (no)
NO (1) NO741155L (no)

Families Citing this family (72)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3979273A (en) * 1975-05-27 1976-09-07 United Technologies Corporation Method of forming aluminide coatings on nickel-, cobalt-, and iron-base alloys
USRE33876E (en) * 1975-09-11 1992-04-07 United Technologies Corporation Thermal barrier coating for nickel and cobalt base super alloys
US4117179A (en) * 1976-11-04 1978-09-26 General Electric Company Oxidation corrosion resistant superalloys and coatings
US4101713A (en) * 1977-01-14 1978-07-18 General Electric Company Flame spray oxidation and corrosion resistant superalloys
USRE30995E (en) * 1977-06-09 1982-07-13 General Electric Company High integrity CoCrAl(Y) coated nickel-base superalloys
US4101715A (en) * 1977-06-09 1978-07-18 General Electric Company High integrity CoCrAl(Y) coated nickel-base superalloys
US4246323A (en) * 1977-07-13 1981-01-20 United Technologies Corporation Plasma sprayed MCrAlY coating
USRE31339E (en) * 1977-08-03 1983-08-09 Howmet Turbine Components Corporation Process for producing elevated temperature corrosion resistant metal articles
US4145481A (en) * 1977-08-03 1979-03-20 Howmet Turbine Components Corporation Process for producing elevated temperature corrosion resistant metal articles
US4123595A (en) * 1977-09-22 1978-10-31 General Electric Company Metallic coated article
US4123594A (en) * 1977-09-22 1978-10-31 General Electric Company Metallic coated article of improved environmental resistance
DE2820289C2 (de) * 1978-05-10 1986-09-18 Leybold-Heraeus GmbH, 5000 Köln Verfahren zum Beschichten von metallischen Substraten mit Legierungsschichten bei erhöhter Substrattemperatur
US4237193A (en) * 1978-06-16 1980-12-02 General Electric Company Oxidation corrosion resistant superalloys and coatings
US4275124A (en) * 1978-10-10 1981-06-23 United Technologies Corporation Carbon bearing MCrAlY coating
US4275090A (en) * 1978-10-10 1981-06-23 United Technologies Corporation Process for carbon bearing MCrAlY coating
US4218007A (en) * 1979-02-22 1980-08-19 General Electric Company Method of diffusion bonding duplex sheet cladding to superalloy substrates
DE3067748D1 (en) * 1979-07-30 1984-06-14 Secr Defence Brit A method of forming a corrosion resistant coating on a metal article
JPS5672495A (en) * 1979-11-19 1981-06-16 Hitachi Ltd Multielementttype indicator
JPS5672167A (en) * 1979-11-19 1981-06-16 Hitachi Ltd Heat resisting alloy
US4405659A (en) * 1980-01-07 1983-09-20 United Technologies Corporation Method for producing columnar grain ceramic thermal barrier coatings
US4401697A (en) * 1980-01-07 1983-08-30 United Technologies Corporation Method for producing columnar grain ceramic thermal barrier coatings
US4405660A (en) * 1980-01-07 1983-09-20 United Technologies Corporation Method for producing metallic articles having durable ceramic thermal barrier coatings
US4414249A (en) * 1980-01-07 1983-11-08 United Technologies Corporation Method for producing metallic articles having durable ceramic thermal barrier coatings
JPS56105810A (en) * 1980-01-24 1981-08-22 Tanaka Kikinzoku Kogyo Kk Hot drawing method for wire material
US4326011A (en) * 1980-02-11 1982-04-20 United Technologies Corporation Hot corrosion resistant coatings
US4407871A (en) * 1980-03-25 1983-10-04 Ex-Cell-O Corporation Vacuum metallized dielectric substrates and method of making same
US4431711A (en) * 1980-03-25 1984-02-14 Ex-Cell-O Corporation Vacuum metallizing a dielectric substrate with indium and products thereof
US4615865A (en) * 1981-08-05 1986-10-07 United Technologies Corporation Overlay coatings with high yttrium contents
CA1209827A (en) * 1981-08-05 1986-08-19 David S. Duvall Overlay coatings with high yttrium contents
US4677034A (en) * 1982-06-11 1987-06-30 General Electric Company Coated superalloy gas turbine components
US4897315A (en) * 1985-10-15 1990-01-30 United Technologies Corporation Yttrium enriched aluminide coating for superalloys
US4639399A (en) * 1985-11-26 1987-01-27 The United States Of America As Represented By The Secretary Of The Navy Nickel oxide, ceramic insulated, high temperature coating
US4910092A (en) * 1986-09-03 1990-03-20 United Technologies Corporation Yttrium enriched aluminide coating for superalloys
JPS63193237A (ja) * 1987-02-06 1988-08-10 Toshiba Corp 半導体集積回路装置
US4933239A (en) * 1989-03-06 1990-06-12 United Technologies Corporation Aluminide coating for superalloys
DE4035790C1 (no) * 1990-11-10 1991-05-08 Mtu Muenchen Gmbh
GB9116332D0 (en) 1991-07-29 1991-09-11 Diffusion Alloys Ltd Refurbishing of corroded superalloy or heat resistant steel parts and parts so refurbished
US5236745A (en) * 1991-09-13 1993-08-17 General Electric Company Method for increasing the cyclic spallation life of a thermal barrier coating
JP2949605B2 (ja) * 1991-09-20 1999-09-20 株式会社日立製作所 合金被覆ガスタービン翼及びその製造方法
WO1993013245A1 (en) * 1991-12-24 1993-07-08 Detroit Diesel Corporation Thermal barrier coating and method of depositing the same on combustion chamber component surfaces
US5500252A (en) * 1992-09-05 1996-03-19 Rolls-Royce Plc High temperature corrosion resistant composite coatings
US5366765A (en) * 1993-05-17 1994-11-22 United Technologies Corporation Aqueous slurry coating system for aluminide coatings
DE4344061C1 (de) * 1993-12-23 1995-03-30 Mtu Muenchen Gmbh Bauteil mit Schutzanordnung gegen Alitieren oder Chromieren beim Gasdiffusionsbeschichten und Verfahren zu seiner Herstellung
US6129991A (en) * 1994-10-28 2000-10-10 Howmet Research Corporation Aluminide/MCrAlY coating system for superalloys
US6103386A (en) * 1994-11-18 2000-08-15 Allied Signal Inc Thermal barrier coating with alumina bond inhibitor
US5562998A (en) * 1994-11-18 1996-10-08 Alliedsignal Inc. Durable thermal barrier coating
US5512382A (en) * 1995-05-08 1996-04-30 Alliedsignal Inc. Porous thermal barrier coating
US5987882A (en) * 1996-04-19 1999-11-23 Engelhard Corporation System for reduction of harmful exhaust emissions from diesel engines
US6422008B2 (en) 1996-04-19 2002-07-23 Engelhard Corporation System for reduction of harmful exhaust emissions from diesel engines
US6224963B1 (en) 1997-05-14 2001-05-01 Alliedsignal Inc. Laser segmented thick thermal barrier coatings for turbine shrouds
US6472018B1 (en) 2000-02-23 2002-10-29 Howmet Research Corporation Thermal barrier coating method
US6482537B1 (en) 2000-03-24 2002-11-19 Honeywell International, Inc. Lower conductivity barrier coating
US6585864B1 (en) 2000-06-08 2003-07-01 Surface Engineered Products Corporation Coating system for high temperature stainless steel
US6635362B2 (en) 2001-02-16 2003-10-21 Xiaoci Maggie Zheng High temperature coatings for gas turbines
US6655369B2 (en) 2001-08-01 2003-12-02 Diesel Engine Transformations Llc Catalytic combustion surfaces and method for creating catalytic combustion surfaces
JP2003147464A (ja) 2001-11-02 2003-05-21 Tocalo Co Ltd 高温強度部材
US6634860B2 (en) * 2001-12-20 2003-10-21 General Electric Company Foil formed structure for turbine airfoil tip
US20030200835A1 (en) * 2002-04-02 2003-10-30 Snecma Services Diffusion-brazing filler powder for parts made of an alloy based on nickel, cobalt or iron
DE102004034410A1 (de) * 2004-07-16 2006-02-02 Mtu Aero Engines Gmbh Schutzschicht zum Aufbringen auf ein Substrat und Verfahren zur Herstellung einer Schutzschicht
DE102006031388A1 (de) * 2006-07-07 2008-01-17 Mtu Aero Engines Gmbh Verfahren für die Reparatur und/oder den Austausch von Einzelelementen eines Bauteils einer Gasturbine
US20090035485A1 (en) * 2007-08-02 2009-02-05 United Technologies Corporation Method for forming active-element aluminide diffusion coatings
US8043718B2 (en) * 2007-09-14 2011-10-25 Siemens Energy, Inc. Combustion turbine component having rare earth NiCrAl coating and associated methods
US8039117B2 (en) * 2007-09-14 2011-10-18 Siemens Energy, Inc. Combustion turbine component having rare earth NiCoCrAl coating and associated methods
US7867626B2 (en) * 2007-09-14 2011-01-11 Siemens Energy, Inc. Combustion turbine component having rare earth FeCrAI coating and associated methods
US8043717B2 (en) * 2007-09-14 2011-10-25 Siemens Energy, Inc. Combustion turbine component having rare earth CoNiCrAl coating and associated methods
EP2098606A1 (en) * 2008-03-04 2009-09-09 Siemens Aktiengesellschaft A MCrAlY alloy, methods to produce a MCrAlY layer and a honeycomb seal
US8029596B2 (en) * 2008-08-19 2011-10-04 Siemens Energy, Inc. Method of making rare-earth strengthened components
US20100068405A1 (en) * 2008-09-15 2010-03-18 Shinde Sachin R Method of forming metallic carbide based wear resistant coating on a combustion turbine component
EP2174740A1 (en) * 2008-10-08 2010-04-14 Siemens Aktiengesellschaft Honeycomb seal and method to produce it
CN108642535B (zh) * 2018-05-31 2019-09-06 上海工程技术大学 一种二氧化铈改性铝化物梯度涂层体系的制备方法
FR3084891B1 (fr) * 2018-08-07 2022-06-24 Commissariat Energie Atomique Revetement pour piece en alliage refractaire
CN110918976B (zh) * 2019-10-30 2022-03-08 哈尔滨工业大学 一种NiAl基合金构件的成形方法

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3594219A (en) * 1969-02-24 1971-07-20 United Aircraft Corp Process of forming aluminide coatings on nickel and cobalt base superalloys
US3640815A (en) * 1969-09-08 1972-02-08 Howmet Corp Method for surface treatment of nickel and cobalt base alloys
US3649225A (en) * 1969-11-17 1972-03-14 United Aircraft Corp Composite coating for the superalloys
US3754903A (en) * 1970-09-15 1973-08-28 United Aircraft Corp High temperature oxidation resistant coating alloy
US3676085A (en) * 1971-02-18 1972-07-11 United Aircraft Corp Cobalt base coating for the superalloys
US3741791A (en) * 1971-08-05 1973-06-26 United Aircraft Corp Slurry coating superalloys with fecraiy coatings
US3869779A (en) * 1972-10-16 1975-03-11 Nasa Duplex aluminized coatings

Also Published As

Publication number Publication date
FR2223478A1 (no) 1974-10-25
DE2414992A1 (de) 1974-10-03
JPS5029436A (no) 1975-03-25
NL7400369A (no) 1974-10-04
US4080486A (en) 1978-03-21
US3873347A (en) 1975-03-25
IT1005893B (it) 1976-09-30
IL43899A0 (en) 1974-03-14
FR2223478B1 (no) 1978-11-17
NO741155L (no) 1974-10-03
GB1460317A (en) 1977-01-06

Similar Documents

Publication Publication Date Title
BE813097A (fr) Procede de revetement d'elements en super-alliage et elements obtenus
FR2309663A1 (fr) Procede d'ignifugeage d'articles d'ameublement
BE824480A (fr) Procede pour empecher l'emulsionnement de melanges de butyraldehydes et de cobalt
BE813176A (fr) Procede d'affinage de metaux
BE819073A (fr) Procede de moulage de feuilles d'alliage superplastique
FR2304601A1 (fr) Procede d'ammonoxydation
FR2289478A1 (fr) Procede de preparation d'hydroxypivaldehyde
BE810438A (fr) Procede d'elimination de so2
BE840594A (fr) Procede d'enduction de surfaces
FR2299769A1 (fr) Procede d'application
BE819683A (fr) Procede d'ensouplage et d'ourdissage
FR2287435A1 (fr) Procede de preparation de cyclohexane-diones-1,3 et d'alkyl-6-dihydro-3,4-pyranones-2
FR2280677A1 (fr) Compositions de revetement reticulables et procede d'obtention
FR2288742A1 (fr) Procede de preparation d'isochromannes
BE817761A (fr) Procede de preparation d'o-benzyltoluenes
BE827294A (fr) Procede d'hydrogenation de diacethoxybutene
BE815826A (fr) Procede d'affinage de metaux ferreux
BE822245A (fr) Procede d'encapsulement
FR2272322A1 (fr) Procede d'enrobage.
BE811703A (fr) Procede de preparation d'isocyanato-triazines
RO63558A2 (ro) Procedeu pentru prepararea n-fenil-n'-1,2,3,-tiadiazol-5-il-tioureei
FR2300398A1 (fr) Procede d'aplatissement de la courbe d
BE840527A (fr) Procede pour la preparation d'aminoacides
BE822218A (fr) Procede de preparation de 2
FR2321974A1 (fr) Procede d'ecriquage