Effect of manganese oxide on the sintered properties and low temperature degradation of Y-TZP ceramics

S. Ramesh, Meenaloshini Satgunam, C. Y. Tan, W. J.Kelvin Chew, W. D. Teng

Research output: Contribution to journalArticle

31 Citations (Scopus)

Abstract

The sinterability of yttria-tetragonal zirconia polycrystals (Y-TZP) containing small amounts of MnO2 as sintering aid was investigated over the temperature range of 1250-1500 °C. Sintered samples were evaluated to determine bulk density, Young's modulus, Vickers hardness and fracture toughness. In addition, the tetragonal phase stability of selected samples was evaluated by subjecting the samples to hydrothermal ageing in superheated steam at 180 °C/10 bar for up to 24 h. The results showed that the addition of MnO2, particularly ≥0.3 wt% was effective in aiding densification, improving the matrix stiffness and hardness when compared to the undoped Y-TZP sintered at temperatures below 1350 °C. On the other hand, the fracture toughness of Y-TZP was unaffected by MnO2 addition except for the 1 wt% MnO2-doped Y-TZP samples sintered above 1400 °C. The hydrothermal ageing resistance of Y-TZP was significantly improved with the additions of MnO2 in the Y-TZP matrix.

Original languageEnglish
Pages (from-to)1603-1608
Number of pages6
JournalCeramics International
Volume34
Issue number7
DOIs
Publication statusPublished - 01 Sep 2008

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Manganese oxide
Yttrium oxide
Polycrystals
Zirconia
Degradation
Temperature
Fracture toughness
Aging of materials
Phase stability
Vickers hardness
Steam
Stiffness matrix
Densification
yttria
manganese oxide
zirconium oxide
Sintering
Elastic moduli
Hardness

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Process Chemistry and Technology
  • Surfaces, Coatings and Films
  • Materials Chemistry

Cite this

Ramesh, S. ; Satgunam, Meenaloshini ; Tan, C. Y. ; Chew, W. J.Kelvin ; Teng, W. D. / Effect of manganese oxide on the sintered properties and low temperature degradation of Y-TZP ceramics. In: Ceramics International. 2008 ; Vol. 34, No. 7. pp. 1603-1608.
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Effect of manganese oxide on the sintered properties and low temperature degradation of Y-TZP ceramics. / Ramesh, S.; Satgunam, Meenaloshini; Tan, C. Y.; Chew, W. J.Kelvin; Teng, W. D.

In: Ceramics International, Vol. 34, No. 7, 01.09.2008, p. 1603-1608.

Research output: Contribution to journalArticle

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AU - Ramesh, S.

AU - Satgunam, Meenaloshini

AU - Tan, C. Y.

AU - Chew, W. J.Kelvin

AU - Teng, W. D.

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