Process for producing refractory carbide grade powder
US4070184A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 24, 1976 |
| Grant date | Jan 24, 1978 |
| Priority date | — |
| Expiry date | Sep 24, 1996 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC22C1/051
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A process for producing a refractory carbide grade powder having improved particle size distribution and pressing characteristics. The process comprises forming an aqueous slurry of a standard refractory metal carbide powder and the desired matrix, attritor milling for 1 to 10 hours, removing the milled slurry from the mill, forming an aqueous slurry having a desired solid concentration, adding a water-soluble relatively long chain polyglycol as a pressing aid and spray drying the slurry to form spherical particles suitable for pressing and sintering. During sintering less grain growth of the refractory metal carbide grade powders occurs than with conventional grade powders sintered under essentially the same temperature conditions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.