Crystal Structures of the RCo<SUB>5</SUB> and R<SUB>2</SUB>Co<SUB>17</SUB> Types Observed in Polystyrene Latexes

  • Hasaka Masayuki
    Department of Materials Science and Engineering, Faculty of Engineering, Nagasaki University
  • Nakashima Hiromichi
    Department of Materials Science and Engineering, Faculty of Engineering, Nagasaki University
  • Oki Kensuke
    Department of Materials Science and Technology, Graduate School of Engineering Sciences, Kyushu University

抄録

Polystyrene latexes with particles of diameters 250 and 500 nm are observed under a metallurgical microscope. The crystal structures of the RCo5 and the R2Co17 types appear stably through the thermal motion of particles, where R means rare earth element. Various defects such as diffuse interfaces, dislocations, point defects, amorphous structures, or segregations of the large and the small particles are distinctly observed in these structures. Polystyrene latexes are found to be useful to study on an atomic scale the crystal structures and their kinetic behavior of intermetallic compounds of the R–Co system.

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