Preparation of magnetostrictive material
US5529745A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 18, 1995 |
| Grant date | Jun 25, 1996 |
| Priority date | — |
| Expiry date | Apr 18, 2015 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10N35/85
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
By compacting in a magnetic field a mixture containing powder raw material A having a composition represented by (Tb.sub.x Dy.sub.1-x)T.sub.y wherein T is at least one metal of Fe, Co, and Ni and 0.30<x.ltoreq.x 0.50 and 1.70.ltoreq.y.ltoreq.2.00, powder raw material B having a composition represented by (Dy.sub.1-t Tb.sub.t).sub.z T.sub.1-z wherein 0.ltoreq.t.ltoreq.0.30 and 0.40.ltoreq.z.ltoreq.0.80 and optionally, powder raw material C consisting essentially of element T, and sintering the compact, there is prepared a magnetostrictive material having a composition represented by (Tb.sub.v Dy.sub.1-v)T.sub.w wherein 0.27.ltoreq.v<0.50 and 1.70.ltoreq.w.ltoreq.2.00, with grains oriented along [111] axis. The material having minimal crystalline magnetic anisotropy at room temperature and large magnetostrains is obtained at low cost by powder metallurgy.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.