INVESTIGATORS OF THE SYSTEMS Y-MN, GD-MN AND SM-MN,

Abstract

The mechanism of alloy formation by the amalgam process was studied. It is very likely that at low temperatures manganese metal is formed from the RE-Mn amalgams. This manganese metal is coexistent with the compounds REHg2 and REHg. At higher temperatures (700 - 800C) RE-metal is formed from the RE-Hg compounds. The two intimately mixed, fine powdered metals react, yielding the RE-Mn-compounds. The systems Y-Mn, Gd-Mn and Sm-Mn was studied. The compounds YMn2, GdMn2, SmMn2, YMn4, SmMn4, GdMn4 and YMn12 were prepared. Their lattice spacings were evaluated. The amalgam process is very advantageous for preparing RE-Mn alloys and compounds at temperatures below the melting points of the components. The magnetic transition temperatures (Curie-points) of the ferromagnetic compounds REMn4 were established (YMn4: 219C; GdMn4: 192C; SmMn4: 170C).

Document Details

Document Type
Technical Report
Publication Date
Jan 31, 1964
Accession Number
AD0614462

Entities

People

  • F. Lihl

Tags

Communities of Interest

  • Materials and Manufacturing Processes

DTIC Thesaurus Topics

  • Curie Temperature
  • Low Temperature
  • Magnetic Transition Temperatures
  • Manganese
  • Melting
  • Melting Point
  • Metals
  • Phase Transformations
  • Transition Temperature
  • Transitions

Readers

  • Materials Science and Engineering.
  • Molecular and Cellular Biochemistry

Technology Areas

  • Space