Carbon-metal phosphate ester composite and method of making
US4454193A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 28, 1983 |
| Grant date | Jun 12, 1984 |
| Priority date | — |
| Expiry date | Feb 28, 2003 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/249999
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A carbon-metal phosphate composite comprises a carbon body having a glassy metal metaphosphate distributed therethrough and coating the surface thereof, wherein said metal metaphosphate is a product of the reaction between a metal salt and a nonionic organophosphorus ester. The composite is characterized by an improved resistance to oxidation at elevated temperatures and a decreased coefficient of friction as compared to carbon bodies. The composite is made by contacting a carbon body, having an external surface and an internal surface provided by an open network of connecting pores, with a solution comprising a nonionic organophosphorus ester and a metal salt to coat both the internal and external surface thereof, curing said coated carbon body to react said organophosphorus ester with said metal salt to provide a metal-organophosphorus salt, calcining said cured carbon body to decompose said metal-organophosphorus salt to provide a metal metaphosphate and recovering a carbon composite having said metal metaphosphate uniformly distributed therethrough and continuously coated on the surface thereof.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.