GB768055A - Coating carbonaceous or carbon-coated articles with silicon nitride - Google Patents
Coating carbonaceous or carbon-coated articles with silicon nitrideInfo
- Publication number
- GB768055A GB768055A GB1735/55A GB173555A GB768055A GB 768055 A GB768055 A GB 768055A GB 1735/55 A GB1735/55 A GB 1735/55A GB 173555 A GB173555 A GB 173555A GB 768055 A GB768055 A GB 768055A
- Authority
- GB
- United Kingdom
- Prior art keywords
- silicon
- mixture
- article
- coated
- silicon nitride
- 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
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/45—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements
- C04B41/50—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials
- C04B41/5053—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials non-oxide ceramics
- C04B41/5062—Borides, Nitrides or Silicides
- C04B41/5066—Silicon nitride
Abstract
Carbonaceous or carbon coated articles, e.g. of graphite, are coated with silicon nitride by treating the article, e.g. by dipping or spraying, with an aqueous slurry or suspension of a mixture of finely divided silicon, e.g. capable of passing 0.104 mms. mesh openings, and a metallic oxide capable of being reduced by the silicon, e.g. 0.5-10 per cent of alumina. The treated article, which may be dried, is thereafter heated between 1000 DEG and 1600 DEG C. in a nitrogenous atmosphere. The mixture may contain a water soluble binding agent such as glucose. Alternatively the articles may be coated by placing the article in a closed vessel filled with nitrogen containing a mixture of powdered silicon, e.g. of mesh size 0.833-0.147 mms. and 0.5 to 25 per cent of alumina and heating between 1000 DEG and 1600 DEG C. to volatilize the silicon and form the coating.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US768055XA | 1954-01-21 | 1954-01-21 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB768055A true GB768055A (en) | 1957-02-13 |
Family
ID=22134288
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1735/55A Expired GB768055A (en) | 1954-01-21 | 1955-01-20 | Coating carbonaceous or carbon-coated articles with silicon nitride |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB768055A (en) |
-
1955
- 1955-01-20 GB GB1735/55A patent/GB768055A/en not_active Expired
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