Rare earth metal-iron group metal target, alloy powder therefor and method of producing same
US4957549A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 20, 1988 |
| Grant date | Sep 18, 1990 |
| Priority date | — |
| Expiry date | Apr 20, 2008 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01F1/0551
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A rare earth metal-iron group metal target for a magneto-optical disk is produced by mixing powder (a) produced by the rapid quenching treatment of an alloy composed of at least one rare earth metal and at least one iron group metal in a composition range which permits the formation of an eutectic structure, with powder (b) from at least one iron group metal in an amount necessary for meeting the composition requirements of the target; and subjecting the resulting mixture to pressure sintering in vacuum or in an inert gas atmosphere at a temperature lower than a liquid phase-appearing temperature of the mixture to produce a rare earth metal-iron group metal intermetallic bonding layer between the particles.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.