FR2320362A2 - Formation of surface diffusion alloys on workpieces - by treatment in reaction mass while coated with metallic fibre felt - Google Patents

Formation of surface diffusion alloys on workpieces - by treatment in reaction mass while coated with metallic fibre felt

Info

Publication number
FR2320362A2
FR2320362A2 FR7524846A FR7524846A FR2320362A2 FR 2320362 A2 FR2320362 A2 FR 2320362A2 FR 7524846 A FR7524846 A FR 7524846A FR 7524846 A FR7524846 A FR 7524846A FR 2320362 A2 FR2320362 A2 FR 2320362A2
Authority
FR
France
Prior art keywords
felt
formation
reaction mass
oxide
workpieces
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
FR7524846A
Other languages
French (fr)
Other versions
FR2320362B2 (en
Inventor
Philippe Galmiche
Andre Hivert
Andre Walder
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.)
Office National dEtudes et de Recherches Aerospatiales ONERA
Original Assignee
Office National dEtudes et de Recherches Aerospatiales ONERA
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 Office National dEtudes et de Recherches Aerospatiales ONERA filed Critical Office National dEtudes et de Recherches Aerospatiales ONERA
Priority to FR7524846A priority Critical patent/FR2320362A2/en
Priority to GB8369/76A priority patent/GB1545584A/en
Priority to DE2609016A priority patent/DE2609016C3/en
Priority to CA247,396A priority patent/CA1072405A/en
Priority to US05/664,392 priority patent/US4096296A/en
Publication of FR2320362A2 publication Critical patent/FR2320362A2/en
Application granted granted Critical
Publication of FR2320362B2 publication Critical patent/FR2320362B2/fr
Granted 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
    • C23C10/28—Solid state diffusion of only metal elements or silicon into metallic material surfaces using solids, e.g. powders, pastes
    • C23C10/34—Embedding in a powder mixture, i.e. pack cementation
    • C23C10/58—Embedding in a powder mixture, i.e. pack cementation more than one element being diffused in more than one step

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Solid-Phase Diffusion Into Metallic Material Surfaces (AREA)
  • Other Surface Treatments For Metallic Materials (AREA)

Abstract

A process is described for the formation of surface diffusion alloys on metallic workpieces, esp. heat resisting materials operating in hot corrosive gases, e.g. turbine guide vanes having holes, in which the workpiece is kept from contact with the active mass by a permeable shield surrounding it. The shield is formed of a thin layer of a heat resisting felt formed from metallic, pref. tubular fibres. The felt is pretreated to form an alloy with 10-60 (pref. 25-50) % Cr and then selectively oxidised to form a Cr oxide layer on the fibres representing at least 5% of the felt wt. Felt-covered parts are embedded in a reaction mass, contg. the metal(s) for the surface alloy and in presence of an element reducing Cr oxide, belonging to the group, lanthanides, Al, Y, Ti, which can form halogenides in the H and halogen atmos. to reduce the Cr oxide, transforming it into a chemically inert protective layer.
FR7524846A 1975-03-07 1975-08-08 Formation of surface diffusion alloys on workpieces - by treatment in reaction mass while coated with metallic fibre felt Granted FR2320362A2 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
FR7524846A FR2320362A2 (en) 1975-08-08 1975-08-08 Formation of surface diffusion alloys on workpieces - by treatment in reaction mass while coated with metallic fibre felt
GB8369/76A GB1545584A (en) 1975-03-07 1976-03-02 Processes and systems for the formation of surface diffusion alloys on perforate metal workpieces
DE2609016A DE2609016C3 (en) 1975-03-07 1976-03-04 Method and device for the thermochemical formation of surface diffusion alloys on heat-resistant metallic workpieces
CA247,396A CA1072405A (en) 1975-03-07 1976-03-05 Methods of forming superficial diffusion alloys
US05/664,392 US4096296A (en) 1975-03-07 1976-03-05 Process for forming surface diffusion alloy layers on refractory metallic articles

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7524846A FR2320362A2 (en) 1975-08-08 1975-08-08 Formation of surface diffusion alloys on workpieces - by treatment in reaction mass while coated with metallic fibre felt

Publications (2)

Publication Number Publication Date
FR2320362A2 true FR2320362A2 (en) 1977-03-04
FR2320362B2 FR2320362B2 (en) 1979-04-20

Family

ID=9158949

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7524846A Granted FR2320362A2 (en) 1975-03-07 1975-08-08 Formation of surface diffusion alloys on workpieces - by treatment in reaction mass while coated with metallic fibre felt

Country Status (1)

Country Link
FR (1) FR2320362A2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020030880A1 (en) * 2018-08-07 2020-02-13 Commissariat A L'energie Atomique Et Aux Energies Alternatives Coating for refractory alloy part

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
NEANT *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020030880A1 (en) * 2018-08-07 2020-02-13 Commissariat A L'energie Atomique Et Aux Energies Alternatives Coating for refractory alloy part
FR3084891A1 (en) * 2018-08-07 2020-02-14 Commissariat A L'energie Atomique Et Aux Energies Alternatives COATING FOR REFRACTORY ALLOY PIECE
US11542586B2 (en) 2018-08-07 2023-01-03 Commissariat A L'energie Atomique Et Aux Energies Alternatives Coating for refractory alloy part

Also Published As

Publication number Publication date
FR2320362B2 (en) 1979-04-20

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