GB884995A - Improvements in methods for the obtainment of articles of chromium or containing chromium and in articles obtained by these methods - Google Patents

Improvements in methods for the obtainment of articles of chromium or containing chromium and in articles obtained by these methods

Info

Publication number
GB884995A
GB884995A GB10637/58A GB1063758A GB884995A GB 884995 A GB884995 A GB 884995A GB 10637/58 A GB10637/58 A GB 10637/58A GB 1063758 A GB1063758 A GB 1063758A GB 884995 A GB884995 A GB 884995A
Authority
GB
United Kingdom
Prior art keywords
chromium
methods
articles
powder
halide
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
GB10637/58A
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
Publication of GB884995A publication Critical patent/GB884995A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C1/00—Making non-ferrous alloys
    • C22C1/04—Making non-ferrous alloys by powder metallurgy
    • C22C1/045—Alloys based on refractory metals
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
    • B22F1/14—Treatment of metallic powder
    • B22F1/145—Chemical treatment, e.g. passivation or decarburisation
    • 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
    • C23C10/06—Solid state diffusion of only metal elements or silicon into metallic material surfaces using gases
    • C23C10/08—Solid state diffusion of only metal elements or silicon into metallic material surfaces using gases only one element being diffused
    • C23C10/10—Chromising

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Manufacture Of Metal Powder And Suspensions Thereof (AREA)
  • Inorganic Compounds Of Heavy Metals (AREA)
  • Manufacture And Refinement Of Metals (AREA)

Abstract

A method of purifying chromium comprises heating a mass of chromium or chromium alloy powder of average grain size 1/10 m.m. at a temperature of at least 600 DEG C. in a mixture of vapours of at least one halide of at least one metal in said mass for such time that no substantial sintering takes place and in such manner that oxygen, water vapour, ammonia, and nitrogen are excluded. The chromium or chromium alloy powder may be placed in a container with a halogen or a halide of one of the metals present and heated in a stream of pure hydrogen. The powder may also contain a metallic oxide the heat of formation of which is higher than that of chromium oxide, e.g. magnesia. It is stated that the purified powder is very ductile and may be easily compressed.
GB10637/58A 1957-04-02 1958-04-02 Improvements in methods for the obtainment of articles of chromium or containing chromium and in articles obtained by these methods Expired GB884995A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR884995X 1957-04-02

Publications (1)

Publication Number Publication Date
GB884995A true GB884995A (en) 1961-12-20

Family

ID=9375212

Family Applications (1)

Application Number Title Priority Date Filing Date
GB10637/58A Expired GB884995A (en) 1957-04-02 1958-04-02 Improvements in methods for the obtainment of articles of chromium or containing chromium and in articles obtained by these methods

Country Status (1)

Country Link
GB (1) GB884995A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2765892A1 (en) * 1997-07-12 1999-01-15 Mtu Muenchen Gmbh PROCESS FOR COATING BY GAS PHASE DIFFUSION OF PARTS MADE OF HEAT-RESISTANT MATERIAL WITH A COATING MATERIAL

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2765892A1 (en) * 1997-07-12 1999-01-15 Mtu Muenchen Gmbh PROCESS FOR COATING BY GAS PHASE DIFFUSION OF PARTS MADE OF HEAT-RESISTANT MATERIAL WITH A COATING MATERIAL

Similar Documents

Publication Publication Date Title
US3061462A (en) Metallic diffusion processes
Benz et al. Some Phase Equilibria in the Uranium-Nitrogen System1
GB896766A (en) Improvements in and relating to nitriding aluminum
GB884995A (en) Improvements in methods for the obtainment of articles of chromium or containing chromium and in articles obtained by these methods
GB783952A (en) Improvements in the manufacture of sintered metal articles
GB363954A (en) Improvements in and relating to methods of coating metals
GB354785A (en) Improvements in the manufacture of refractory metals such as tungsten
GB1103609A (en) Improvements in or relating to methods of manufacturing aluminium nitride
GB735472A (en) Improvements in or relating to the manufacture of titanium powder and massive bodies of titanium
GB985174A (en) Preparation of cermets
SU116612A1 (en) The method of manufacturing powder alloyed alloys
GB863051A (en) Thermal treatment of articles composed of an aluminum base alloy
US3057474A (en) Container for high purity metals
ES418431A1 (en) Chemical processing plant or equipment in which the surfaces of iron-containing components thereof have been protected against carburization
ES361376A1 (en) Method of carbiding tantalum or tantalum alloy and filament
GB1273191A (en) Method of cleaning and optionally annealing coiled metal foil
SU375322A1 (en) METHOD OF CEMENTATION OF PRODUCTS IN BOILER LAYER
GB770401A (en) Process and furnace for heat-treating metals in a space containing a non-oxidizing protective gas atmosphere
ES281981A1 (en) Procedure for manufacturing metallic oxides (Machine-translation by Google Translate, not legally binding)
GB915090A (en) Improvements in or relating to metallic diffusion processes
GB190413579A (en) Improvements relating to the Deposition of Metals or Metallic Compounds upon Metals or Metallic Articles
GB783954A (en) Improvements in or relating to methods of producing diffusion alloy coatings on metals
GB922955A (en) Prcoess for the manufacture of pulverized iron
GB955708A (en) Improvements in or relating to the preparation of uranium monocarbide powder
GB877675A (en) Improvements in and relating to methods of nitriding articles made from a metal alloy