GB936174A - Metal coating of refractory oxide particles - Google Patents
Metal coating of refractory oxide particlesInfo
- Publication number
- GB936174A GB936174A GB10026/62A GB1002662A GB936174A GB 936174 A GB936174 A GB 936174A GB 10026/62 A GB10026/62 A GB 10026/62A GB 1002662 A GB1002662 A GB 1002662A GB 936174 A GB936174 A GB 936174A
- Authority
- GB
- United Kingdom
- Prior art keywords
- particles
- coating
- metal compound
- metal
- fluidized
- 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
-
- 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
- B22F9/00—Making metallic powder or suspensions thereof
- B22F9/16—Making metallic powder or suspensions thereof using chemical processes
- B22F9/18—Making metallic powder or suspensions thereof using chemical processes with reduction of metal compounds
- B22F9/28—Making metallic powder or suspensions thereof using chemical processes with reduction of metal compounds starting from gaseous metal compounds
-
- 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
- B22F1/18—Non-metallic particles coated with metal
-
- 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
- C23C16/00—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes
- C23C16/44—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes characterised by the method of coating
- C23C16/442—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes characterised by the method of coating using fluidised bed process
-
- 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
- B22F2999/00—Aspects linked to processes or compositions used in powder metallurgy
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Inorganic Compounds Of Heavy Metals (AREA)
- Inorganic Fibers (AREA)
Abstract
A process for coating particles of refractory oxides, particularly beryllia and alumina or blends thereof with metal by forming a fluidized suspension of the oxide particles with hydrogen, heating the fluidized particles and introducing a current of decomposable gaseous metal compound into the fluidized suspension, the temperature of the fluidized particles being at least that temperature at which the metal compound decomposes under the reducing conditions obtaining, whereby the metal compound decomposes on contact with said heated particles to deposit metal in situ on the particles and substantially completely coats the particles in said metal. The gaseous metal compound may be tungsten hexafluoride, WF6, or it may be molybdenum hexafluoride or tantalum pentafluoride. The oxide particles may be in the form of powder or fibres; when the particles are in powder form a suitable size is - 100 to + 325 mesh and when in fibre form the cross-sectional diameter should be 100-1000 microns. Coating thicknesses may be from 1-20 microns and the proportion of H2/WF6 in the gaseous flow on a volume basis, is about 10 or more. The Specification also refers to the coating of BeO and Al2O3 by chromium. A coating temperature of 600 DEG C. is quoted.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10461861A | 1961-04-21 | 1961-04-21 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB936174A true GB936174A (en) | 1963-09-04 |
Family
ID=22301438
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB10026/62A Expired GB936174A (en) | 1961-04-21 | 1962-03-15 | Metal coating of refractory oxide particles |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB936174A (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3343979A (en) * | 1965-10-22 | 1967-09-26 | Jr Charles E Hamrin | Method for depositing a tungsten-rhenium metal alloy on a substrate |
US4360565A (en) * | 1977-09-28 | 1982-11-23 | Phillips Petroleum Company | Iron-containing refractory balls for retorting oil shale |
US4371481A (en) | 1979-02-06 | 1983-02-01 | Phillips Petroleum Company | Iron-containing refractory balls for retorting oil shale |
US4402886A (en) | 1980-11-24 | 1983-09-06 | Phillips Petroleum Company | Tron-containing refractory balls for retorting oil shale |
US4421701A (en) | 1980-11-24 | 1983-12-20 | Phillips Petroleum Company | Process for preparing iron-containing refractory balls for retorting oil shale |
US4438161A (en) | 1980-11-24 | 1984-03-20 | Phillips Petroleum Company | Iron-containing refractory balls for retorting oil shale |
-
1962
- 1962-03-15 GB GB10026/62A patent/GB936174A/en not_active Expired
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3343979A (en) * | 1965-10-22 | 1967-09-26 | Jr Charles E Hamrin | Method for depositing a tungsten-rhenium metal alloy on a substrate |
US4360565A (en) * | 1977-09-28 | 1982-11-23 | Phillips Petroleum Company | Iron-containing refractory balls for retorting oil shale |
US4371481A (en) | 1979-02-06 | 1983-02-01 | Phillips Petroleum Company | Iron-containing refractory balls for retorting oil shale |
US4402886A (en) | 1980-11-24 | 1983-09-06 | Phillips Petroleum Company | Tron-containing refractory balls for retorting oil shale |
US4421701A (en) | 1980-11-24 | 1983-12-20 | Phillips Petroleum Company | Process for preparing iron-containing refractory balls for retorting oil shale |
US4438161A (en) | 1980-11-24 | 1984-03-20 | Phillips Petroleum Company | Iron-containing refractory balls for retorting oil shale |
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