GB1043578A - Process for coating refractory metal articles - Google Patents

Process for coating refractory metal articles

Info

Publication number
GB1043578A
GB1043578A GB16124/64A GB1612464A GB1043578A GB 1043578 A GB1043578 A GB 1043578A GB 16124/64 A GB16124/64 A GB 16124/64A GB 1612464 A GB1612464 A GB 1612464A GB 1043578 A GB1043578 A GB 1043578A
Authority
GB
United Kingdom
Prior art keywords
alloys
bath
metals
article
hours
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.)
Expired
Application number
GB16124/64A
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.)
EIDP Inc
Original Assignee
EI Du Pont de Nemours and Co
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 EI Du Pont de Nemours and Co filed Critical EI Du Pont de Nemours and Co
Publication of GB1043578A publication Critical patent/GB1043578A/en
Expired legal-status Critical Current

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
    • C23C10/00—Solid state diffusion of only metal elements or silicon into metallic material surfaces
    • C23C10/18—Solid state diffusion of only metal elements or silicon into metallic material surfaces using liquids, e.g. salt baths, liquid suspensions
    • C23C10/26—Solid state diffusion of only metal elements or silicon into metallic material surfaces using liquids, e.g. salt baths, liquid suspensions more than one element being diffused
    • 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
    • C23C10/18—Solid state diffusion of only metal elements or silicon into metallic material surfaces using liquids, e.g. salt baths, liquid suspensions
    • C23C10/20—Solid state diffusion of only metal elements or silicon into metallic material surfaces using liquids, e.g. salt baths, liquid suspensions only one element being diffused
    • C23C10/24—Salt bath containing the element to be diffused

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • Chemically Coating (AREA)

Abstract

An article of Nb, Ta or alloys of or containing at least 50% of these metals, is provided with an oxidation resistant coating of Ti or Cr or alloys thereof by heating the article for 1 to 5 hours at 800 to 1000 DEG C. in a molten bath comprising an alkali or alkaline earth metal halide, e.g. NaCl, TiCl2 and Ti metal and/or CrCl2 and Cr metal, with or without one or more of the metals Al, V and Zr. The process is preferably carried out in an inert gas atmosphere with the bath being agitated, e.g. by blowing argon therethrough. The dichloride is preferably present on the bath to the extent of 5 to 20 mol per cent. The metals may be added to the bath as powdered alloys. Examples of alloys to be coated are Nb-base alloys with (a) 1%Zr, (b) 10% Ti and 5% Zr, (c) 10% Ti and 10% Mo, and a Ta-base alloy with 10% W. Alloy compositions of the resulting coating are specified, being within the range: 5-10% Nb, 5-40% Cr, balance Ti. A layer of silicon may be applied over the Ti-Cr coated article by heating it, e.g. at 1000 DEG C for 4 hours, in a fluidized bed consisting of powdered silicon, pure silica and iodine vapour carried in a flow of argon.
GB16124/64A 1963-05-07 1964-04-17 Process for coating refractory metal articles Expired GB1043578A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US278706A US3263325A (en) 1963-05-07 1963-05-07 Method of coating and bonding refractory-base-metal articles

Publications (1)

Publication Number Publication Date
GB1043578A true GB1043578A (en) 1966-09-21

Family

ID=23066026

Family Applications (1)

Application Number Title Priority Date Filing Date
GB16124/64A Expired GB1043578A (en) 1963-05-07 1964-04-17 Process for coating refractory metal articles

Country Status (2)

Country Link
US (1) US3263325A (en)
GB (1) GB1043578A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3123871A1 (en) * 1980-06-17 1982-03-11 Hitachi Metals, Ltd., Tokyo METHOD FOR TREATING SURFACES

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3415672A (en) * 1964-11-12 1968-12-10 Gen Electric Method of co-depositing titanium and aluminum on surfaces of nickel, iron and cobalt
US3753668A (en) * 1970-04-16 1973-08-21 Api Corp Diffusion coated metallic substrate
US3866307A (en) * 1973-09-07 1975-02-18 Western Electric Co Method for soldering, fusing or brazing
USRE30399E (en) * 1977-08-19 1980-09-09 Western Electric Co., Inc. Method for soldering, fusing or brazing
JPS5464049A (en) * 1977-10-31 1979-05-23 Mitsubishi Electric Corp Bonding of metals or alloys
DE3025033A1 (en) * 1980-07-02 1982-01-21 Degussa Ag, 6000 Frankfurt METHOD FOR PRODUCING VANADINE CARBIDE LAYERS ON IRON
US4766677A (en) * 1986-05-27 1988-08-30 Detrex Chemical Industries, Inc. Method and apparatus for vapor phase soldering

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3129502A (en) * 1954-04-21 1964-04-21 Chrysler Corp Process for joining metallic parts
US3055098A (en) * 1956-10-22 1962-09-25 Westinghouse Electric Corp Brazing dissimilar metals

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3123871A1 (en) * 1980-06-17 1982-03-11 Hitachi Metals, Ltd., Tokyo METHOD FOR TREATING SURFACES

Also Published As

Publication number Publication date
US3263325A (en) 1966-08-02

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