Composite metal material and method for producing the same
US8273290B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Oct 16, 2008 |
| Grant date | Sep 25, 2012 |
| Priority date | — |
| Expiry date | Sep 14, 2029 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC22C2026/006
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A method for producing a composite metal material includes preparing a solution containing a surfactant having both hydrophilicity and hydrophobicity, dispersing a nanosized to micro-sized fine carbonaceous substance into a state of being monodispersed in the solution, bringing the solution having the dispersed fine carbonaceous substance into contact with surface of a metal powder particle, drying the metal powder particle to make the fine carbonaceous substance in the monodispersed state adhere to the surface of the metal powder particle via a component of the solution, and thermally decomposing and removing the solution component adhering to the surface of the metal powder particle by heat-treating the metal powder particle either in a hydrogen-containing reducing atmosphere or in a vacuum atmosphere to partially expose the surface of the metal powder particle out of the adhering fine carbonaceous substance, and thus progress diffusion and sintering among the metal powder particles through exposed parts.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.