Process for producing mixed ultrafine powder of metals or ceramics
US4689075A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 4, 1985 |
| Grant date | Aug 25, 1987 |
| Priority date | — |
| Expiry date | Oct 4, 2005 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01P2006/80
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A process for producing a mixed ultrafine powder, which comprises reacting at least two metals or ceramics in the molten state with hydrogen, nitrogen, oxygen, a mixture of hydrogen and nitrogen or a mixture of nitrogen and oxygen. Each said gas or gaseous mixture being activated with a hot plasma, in an atmosphere of hydrogen gas, nitrogen gas, oxygen gas, a gaseous mixture of hydrogen and nitrogen, a gaseous mixture of nitrogen and oxygen, or a gaseous mixture of any of said gases with an inert gas under a pressure of 50 torr to 3 atmospheres to form ultrafine particles of said at least two metals or ceramics afloat in the atmospheric gas, and thereafter mixing the floating ultrafine particles of the metals or ceramics by a gas current.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.