NIOSHTIC-2 Publications Search

High coercive force rare earth metal-cobalt magnets containing copper and magnesium.

Authors
Walkiewicz JW
Source
US Pat 4,174,966 1979 Nov; :1-4
NIOSHTIC No.
10011945
Abstract
A high-coercivity alloy composition for permanent magnets is described, containing re 34-37, cu 2-7, mg 0.05-.40, and CO 55.6- 63.9 Wt pct, other than sm, where re is misch metal or a rare-earth element. Alloys containing both cu and mg had substantially higher coercivity. For example, an alloy containing misch metal 36, cu 6.0, Mg 0.21 Wt pct and the remainer CO had intrinsic coercivity 27.6 Koe, normal coercivity 6.05 Koe, remanence 6.26 Kg, and energy product 9.5 Mg-oe, respectively, versus values of 0.7 Koe, 0.67 Koe, 6.24 Kg, and 2.0 Mg-oe respectively, for an alloy containing 4.0 Wt pct cu and no mg.
Keywords
Rare-earth-metals
CAS No.
7440-50-8; 7439-95-4; 7440-48-4
Publication Date
19791120
Document Type
PA; Patent
Fiscal Year
1980
Identifying No.
PAT 4,174,966
NIOSH Division
RERC;
Source Name
United States Patent 4,174,966
Page last reviewed: May 20, 2022
Content source: National Institute for Occupational Safety and Health Education and Information Division