Mechanical Characterization of Ruthenocuprates by Nanoindentation Technique

Alp U., Yilmaz F., Uzun O., Topal U., Ergen S., Kolemen U.

JOURNAL OF SUPERCONDUCTIVITY AND NOVEL MAGNETISM, cilt.28, sa.2, ss.519-523, 2015 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 28 Sayı: 2
  • Basım Tarihi: 2015
  • Doi Numarası: 10.1007/s10948-014-2799-2
  • Dergi Adı: JOURNAL OF SUPERCONDUCTIVITY AND NOVEL MAGNETISM
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.519-523
  • Anahtar Kelimeler: Ruthenocuprates, Powder metallurgy, Nanoindentation, Mechanical properties, POLYCRYSTALLINE SUPERCONDUCTORS, MAGNETIC-PROPERTIES, RUSR2RECU2O8 RE, HARDNESS, EU, TEMPERATURE, MODULUS, GD
  • Yozgat Bozok Üniversitesi Adresli: Hayır

Özet

The nanomechanical properties of RuSr (2) RECu O-2(8) (RE = Eu, Gd and Ho) prepared by ammonium nitrate melt technique (ANMT) were investigated using nanoindentation technique. The indentation load-displacement curves of the samples were obtained at different peak loads ranging from 10 to 400 mN. Reduced elastic modulus and hardness of the superconductors calculated from loading-unloading curves were peak load dependent, i.e., indentation size effect (ISE). We observed that Ho substitution led to a substantial improvement in mechanical properties of the RuSr2RECu2O8, which was attributed to the strong grain connectivity and dense and less porous structure of RE = Ho sample.