Nanoscaled grain boundaries and pores, microstructure and mechanical properties of translucent Yb: [LuxY(1-x)O3] ceramics

O. Khasanov, V. Osipov, E. Dvilis, A. Kachaev, A. Khasanov, V. Shitov

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7 Citations (Scopus)

Abstract

Translucent ceramics of Yb:[LuxY(1-x)O3] system doped by ZrO2 was sintered from nanopowder synthesized by laser evaporation. The relative density of the ceramics was 99.97%, residual pores had sizes from 8 nm to 20 nm, Young modulus was 200 GPa at the applied load of 2000 mN, the microhardness was 12.8 GPa. The grains of ceramics had sizes 1-10 μm, but the thickness of grain boundaries was about 1 nm. The transcrystalline type of the crack propagation was detected in the specially broken ceramics. The results indicated high strength of grain bonds and good perfection of grain boundaries in the studied ceramics but an increased content of pores (higher than 10-3 vol.%) and stoichiometry deviation (Lu:Y:O = 0.21:0.79:3) from the required one (Lu:Y:O = 0.25:0.75:3).

Original languageEnglish
JournalJournal of Alloys and Compounds
Volume509
Issue numberSUPPL. 1
DOIs
Publication statusPublished - 14 Jul 2011

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Keywords

  • Dry compacting
  • Nanopowder
  • Translucent ceramics
  • Ultrasonic action

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

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