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 methodsInfo
- 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
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 And Refinement Of Metals (AREA)
- Manufacture Of Metal Powder And Suspensions Thereof (AREA)
- Inorganic Compounds Of Heavy 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.
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)
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 |
-
1958
- 1958-04-02 GB GB10637/58A patent/GB884995A/en not_active Expired
Cited By (1)
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 |
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