GB933971A - Method of protecting the surfaces of the metals niobium and tantalum - Google Patents

Method of protecting the surfaces of the metals niobium and tantalum

Info

Publication number
GB933971A
GB933971A GB4161460A GB4161460A GB933971A GB 933971 A GB933971 A GB 933971A GB 4161460 A GB4161460 A GB 4161460A GB 4161460 A GB4161460 A GB 4161460A GB 933971 A GB933971 A GB 933971A
Authority
GB
United Kingdom
Prior art keywords
tantalum
protecting
vapour
radical
metals niobium
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
GB4161460A
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.)
BASF Schweiz AG
Original Assignee
Ciba AG
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 Ciba AG filed Critical Ciba AG
Publication of GB933971A publication Critical patent/GB933971A/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
    • C23C8/00—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
    • C23C8/06—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases
    • C23C8/08—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases only one element being applied
    • C23C8/24—Nitriding
    • 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
    • C23C8/00—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
    • C23C8/06—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Powder Metallurgy (AREA)
  • Inorganic Compounds Of Heavy Metals (AREA)
  • Chemical Vapour Deposition (AREA)

Abstract

A method for protecting the surface of tantalum or niobium metal against oxidation comprises the steps of (1) treating it at a raised temperature (e.g. 200-500 DEG C.) with a vapour of a nitrogenous hydride of the general formula <FORM:0933971/II/1> in which R1 is a hydrogen atom, an NH2 radical, an alkyl or aryl radical or a heterocyclic residue; (2) leaving it to cool in an atmosphere of the vapour; and (3) vacuum degasifying the product. Suitable compounds of the above formula are ammonia, hydrazine and n propylamine. The treatment is des
GB4161460A 1959-12-02 1960-12-02 Method of protecting the surfaces of the metals niobium and tantalum Expired GB933971A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH8137859A CH377613A (en) 1959-12-02 1959-12-02 Process for protecting the surface of niobium and tantalum

Publications (1)

Publication Number Publication Date
GB933971A true GB933971A (en) 1963-08-14

Family

ID=4538761

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4161460A Expired GB933971A (en) 1959-12-02 1960-12-02 Method of protecting the surfaces of the metals niobium and tantalum

Country Status (3)

Country Link
CH (1) CH377613A (en)
DE (1) DE1192020B (en)
GB (1) GB933971A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4508563A (en) * 1984-03-19 1985-04-02 Sprague Electric Company Reducing the oxygen content of tantalum

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4342730A1 (en) * 1993-12-15 1995-06-22 Peter Dr Peppler Thermochemical diffusion treatment of metal pt. esp. steel with de-passivation

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE668639C (en) * 1932-07-20 1938-12-07 Bernhard Berghaus Process for the annealing of metal objects
DE692080C (en) * 1935-10-11 1940-06-12 Bernhard Berghaus Process for casting metal objects in gas or vapor form

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4508563A (en) * 1984-03-19 1985-04-02 Sprague Electric Company Reducing the oxygen content of tantalum

Also Published As

Publication number Publication date
DE1192020B (en) 1965-04-29
CH377613A (en) 1964-05-15

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