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<p>The study examines the effect of varying yttria (Y<sub>2</sub>O<sub>3</sub>) content, used as a stabilizing dopant, on the micro-structure, phase composition, and mechanical properties of zirconia (ZrO<sub>2</sub>)-based ceramics fabricated by electron-beam sintering under forevacuum conditions. Samples with Y<sub>2</sub>O<sub>3</sub> concentrations ranging from 1.8 to 31.5 wt.% were investigated. An increase in the proportion of yttria in the initial mixture resulted in a decrease in the density of the sintered ceramics, while simultaneously promoting the stabilization of the tetragonal ZrO<sub>2</sub> phase. This phase stabilization enhanced the strength characteristics of the material, even in the absence of applied pressure during sintering. The highest microhardness, reaching 5.64 GPa, was achieved at a concentration of 15 wt.% Y<sub>2</sub>O<sub>3</sub>.</p>

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Electron Beam Sintering of Zirconia-Based Ceramics with Varying Yttria Content

  • 期刊论文

  • 发表日期：

    2025年11月21日

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  • A. E. Petrov,
  • I. Yu. Bakeev,
  • A. A. Zenin,
  • A. S. Klimov

摘要

The study examines the effect of varying yttria (Y2O3) content, used as a stabilizing dopant, on the micro-structure, phase composition, and mechanical properties of zirconia (ZrO2)-based ceramics fabricated by electron-beam sintering under forevacuum conditions. Samples with Y2O3 concentrations ranging from 1.8 to 31.5 wt.% were investigated. An increase in the proportion of yttria in the initial mixture resulted in a decrease in the density of the sintered ceramics, while simultaneously promoting the stabilization of the tetragonal ZrO2 phase. This phase stabilization enhanced the strength characteristics of the material, even in the absence of applied pressure during sintering. The highest microhardness, reaching 5.64 GPa, was achieved at a concentration of 15 wt.% Y2O3.