Process for the preparation of molybdenum-tungsten carbides
US4330332A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 5, 1979 |
| Grant date | May 18, 1982 |
| Priority date | — |
| Expiry date | Apr 5, 1999 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E60/50
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A process for the preparation of an extrahard material based on tungsten and molybdenum carbides and having a hexagonal crystal structure identical with that of tungsten carbide. According to this process, one heats between 1000.degree. C. and a temperature T.sub.x, which is lower than the maximum stability limit of the Mo.sub.x W.sub.l-x C phase wherein 0.01.times.1, a mixture, intimate to the molecular or atomic scale, of tungsten and molybdenum the total content of which in Fe, Ni and Co does not exceed 0.1% with carbon and/or a carbon compound. T.sub.x is defined as follows: EQU For 0.01<.times.<0.8, T.sub.x =2700-1375x.degree.C; EQU For 0.8<.times.<1, T.sub.x =3400-2250x.degree.C.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.