GB765793A - Method of forming mixed superficial diffusion alloys, including chromium, on metallic objects - Google Patents
Method of forming mixed superficial diffusion alloys, including chromium, on metallic objectsInfo
- Publication number
- GB765793A GB765793A GB12189/55A GB1218955A GB765793A GB 765793 A GB765793 A GB 765793A GB 12189/55 A GB12189/55 A GB 12189/55A GB 1218955 A GB1218955 A GB 1218955A GB 765793 A GB765793 A GB 765793A
- Authority
- GB
- United Kingdom
- Prior art keywords
- halide
- chromium
- addition
- metal
- reaction
- 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
- 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
- C23C10/14—Solid state diffusion of only metal elements or silicon into metallic material surfaces using gases more than one element being diffused in 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)
- Manufacture And Refinement Of Metals (AREA)
Abstract
In a method of producing on a metallic object mixed superficial diffusion alloys of the metal of said object with at least two addition metals, one of which is chromium, using a halide vapour producing system including at least one cementing composition capable, merely under the effect of heat, of giving off halide vapours, said object and said halide vapour producing system are placed in a container, with the cementing composition out of contact with said object, and the temperature is raised to effect halide disengagement, the halide vapour producing system being such that when heated it gives off vapours of a chromium halide and a halide of at least one other addition metal and being divided into at least two distinct portions located in two different zones of said container, one of which zones is disposed above the object. The halides of the addition metals, other than chromium, may be formed by (a) the reaction of a chromium halide with the addition metal when the latter is in the divided condition, (b) the reaction of the addition metal with a halogen acid (preferably HF) formed when chromium is diffused into the objects, (c) the reaction of alumina or zirconia in the cementing composition with chromium fluoride, (d) the reaction of an ammonium halide with the addition metal. Alternatively, the halides may be formed in a preceding operation and introduced as such into the cementing composition. The object to be treated may be of a ferrous metal and the addition metals comprise Al, Co, Cr, Mo, Ni, Si, Ti, W and Zr.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR765793X | 1950-12-13 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB765793A true GB765793A (en) | 1957-01-16 |
Family
ID=9182947
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB12189/55A Expired GB765793A (en) | 1950-12-13 | 1951-12-03 | Method of forming mixed superficial diffusion alloys, including chromium, on metallic objects |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB765793A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3252823A (en) * | 1961-10-17 | 1966-05-24 | Du Pont | Process for aluminum reduction of metal halides in preparing alloys and coatings |
| US4698244A (en) * | 1985-10-31 | 1987-10-06 | Air Products And Chemicals, Inc. | Deposition of titanium aluminides |
| GB2256876A (en) * | 1991-06-18 | 1992-12-23 | Mtu Muenchen Gmbh | Aluminium gas diffusion coating using heated aluminium particles |
-
1951
- 1951-12-03 GB GB12189/55A patent/GB765793A/en not_active Expired
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3252823A (en) * | 1961-10-17 | 1966-05-24 | Du Pont | Process for aluminum reduction of metal halides in preparing alloys and coatings |
| US4698244A (en) * | 1985-10-31 | 1987-10-06 | Air Products And Chemicals, Inc. | Deposition of titanium aluminides |
| GB2256876A (en) * | 1991-06-18 | 1992-12-23 | Mtu Muenchen Gmbh | Aluminium gas diffusion coating using heated aluminium particles |
| GB2256876B (en) * | 1991-06-18 | 1995-03-22 | Mtu Muenchen Gmbh | Method of gas diffusion coating |
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