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Effect of Gd2O3on the thermal conductivity of ZrO2–4 mol.% Y2O3ceramics fabricated by spark plasma sintering

Authors
Journal
Scripta Materialia
1359-6462
Publisher
Elsevier
Volume
69
Issue
2
Identifiers
DOI: 10.1016/j.scriptamat.2013.01.037
Keywords
  • Zro2–4 Mol.%Y2O3
  • Gd2O3
  • Gd2Zr2O7
  • Thermal Conductivity
  • Fluorite Structure

Abstract

Abstract Porous and dense ZrO2–4mol.% Y2O3 ceramics were fabricated by spark plasma sintering at 1100 and 1500°C. The porosity of the ceramics sintered at 1100°C increased with the addition of ∼0–5mol.% Gd2O3. In contrast, the ceramics sintered at 1500°C showed full density regardless of the amount of Gd2O3 addition. The fluorite-type Gd2Zr2O7 phase was formed as the second phase in the tetragonal ZrO2 matrix. The thermal diffusivity and thermal conductivity of sintered ZrO2–4mol.% Y2O3 decreased with increasing Gd2O3 addition.

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