High Coercive Force Rare Earth Metal-Cobalt Magnets Containing Copper and Magnesium

Details

• Personal Author:
  Walkiewicz, John W.
• Description:
  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. [Description provided by NIOSH]
• Subjects:
  Metals Occupational Health Safety
• Keywords:
  Rare-earth-metals
• Series:
  Mining Publications
• Document Type:
  Text
• Genre:
  Other
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Division:
  RERC - Reno Research Center
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Pages in Document:
  1-4
• NIOSHTIC Number:
  nn:10011945
• Citation:
  US Pat 4,174,966 1979 Nov; :1-4
• CAS Registry Number:
  Cobalt (CAS RN 7440-48-4) ; Copper (CAS RN 7440-50-8) ; Magnesium (CAS RN 7439-95-4)
• Federal Fiscal Year:
  1980
• Peer Reviewed:
  False
• Source Full Name:
  United States Patent 4,174,966
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:72832877971dc7004be858609864dde94c40370a486670c5c3023f3cc6258f72a94912a81ec1f9172d1be2fe87218816f8f2f56711cf61524657cdde202447a5
• Download URL:
  https://stacks.cdc.gov/view/cdc/220211/cdc_220211_DS1.pdf
• File Type:
  [PDF - 415.62 KB ]