Process for manufacturing high strength Al.sub.2 O.sub.3 -ZRO.sub.3 alloy grains
US3977132A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 7, 1974 |
| Grant date | Aug 31, 1976 |
| Priority date | — |
| Expiry date | Oct 7, 1994 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K3/1409
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
High strength abrasive products are prepared according to the following steps; (a) pouring a molten abrasive composition which takes a needle-like crystal structure upon freezing thereof into a mold set comprising two molds, one surface of said molds having hemisphere-like projections of the same size disposed regularly and closely to each other, the two molds being brought into contact with each other or to within 5 mm apart from each other in such a way that the projections of one mold surface fit into the cavities between the projections of the other, (b) subjecting the molten abrasive composition to cooling for freezing, (c) removing the frozen mass from the molds and (d) crushing the mass into abrasive grains.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.