Effect of Copper Oxide and Manganese Oxide on Properties and Low Temperature Degradation of Sintered Y-TZP Ceramic

M. M. Khan, S. Ramesh, L. T. Bang, Y. H. Wong, S. Ubenthiran, C. Y. Tan, J. Purbolaksono, Halina Misran

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

The effect of copper oxide (CuO) and manganese oxide (MnO2) co-dopant on the densification behavior of 3 mol% yttria-stabilized zirconia was investigated. Green samples were prepared and sintered in air at temperatures ranging from 1250 to 1500 °C with a short holding time of 12 min. Sintered bodies were characterized to determine the phase stability, bulk density, hardness, fracture toughness, Young’s modulus and grain size. In addition, the aging-induced tetragonal to monoclinic phase transformation of the sintered zirconia was evaluated. It was revealed that the addition of CuO-MnO2 co-dopant was beneficial in enhancing the densification and mechanical properties of the ceramic particularly at low temperatures. A high fracture toughness of 5.5 MPam1/2 coupled with high hardness of 14.5 GPa was obtained for co-doped samples sintered at 1350 °C. However, the undoped ceramic exhibited better properties when sintered above 1350 °C. The study also found that the dopants did not prevent grain coarsening and hence did not suppress the aging-induced phase transformation particularly for samples sintered above 1350 °C.

Original languageEnglish
Pages (from-to)4328-4335
Number of pages8
JournalJournal of Materials Engineering and Performance
Volume23
Issue number12
DOIs
Publication statusPublished - 02 Dec 2014

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Manganese oxide
Copper oxides
Doping (additives)
Densification
Degradation
Fracture toughness
Aging of materials
Phase transitions
Hardness
Phase stability
Yttria stabilized zirconia
Coarsening
Zirconia
Temperature
Elastic moduli
Mechanical properties
Air
manganese oxide
yttria stabilized tetragonal zirconia

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

Cite this

Khan, M. M. ; Ramesh, S. ; Bang, L. T. ; Wong, Y. H. ; Ubenthiran, S. ; Tan, C. Y. ; Purbolaksono, J. ; Misran, Halina. / Effect of Copper Oxide and Manganese Oxide on Properties and Low Temperature Degradation of Sintered Y-TZP Ceramic. In: Journal of Materials Engineering and Performance. 2014 ; Vol. 23, No. 12. pp. 4328-4335.
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Effect of Copper Oxide and Manganese Oxide on Properties and Low Temperature Degradation of Sintered Y-TZP Ceramic. / Khan, M. M.; Ramesh, S.; Bang, L. T.; Wong, Y. H.; Ubenthiran, S.; Tan, C. Y.; Purbolaksono, J.; Misran, Halina.

In: Journal of Materials Engineering and Performance, Vol. 23, No. 12, 02.12.2014, p. 4328-4335.

Research output: Contribution to journalArticle

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AU - Khan, M. M.

AU - Ramesh, S.

AU - Bang, L. T.

AU - Wong, Y. H.

AU - Ubenthiran, S.

AU - Tan, C. Y.

AU - Purbolaksono, J.

AU - Misran, Halina

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N2 - The effect of copper oxide (CuO) and manganese oxide (MnO2) co-dopant on the densification behavior of 3 mol% yttria-stabilized zirconia was investigated. Green samples were prepared and sintered in air at temperatures ranging from 1250 to 1500 °C with a short holding time of 12 min. Sintered bodies were characterized to determine the phase stability, bulk density, hardness, fracture toughness, Young’s modulus and grain size. In addition, the aging-induced tetragonal to monoclinic phase transformation of the sintered zirconia was evaluated. It was revealed that the addition of CuO-MnO2 co-dopant was beneficial in enhancing the densification and mechanical properties of the ceramic particularly at low temperatures. A high fracture toughness of 5.5 MPam1/2 coupled with high hardness of 14.5 GPa was obtained for co-doped samples sintered at 1350 °C. However, the undoped ceramic exhibited better properties when sintered above 1350 °C. The study also found that the dopants did not prevent grain coarsening and hence did not suppress the aging-induced phase transformation particularly for samples sintered above 1350 °C.

AB - The effect of copper oxide (CuO) and manganese oxide (MnO2) co-dopant on the densification behavior of 3 mol% yttria-stabilized zirconia was investigated. Green samples were prepared and sintered in air at temperatures ranging from 1250 to 1500 °C with a short holding time of 12 min. Sintered bodies were characterized to determine the phase stability, bulk density, hardness, fracture toughness, Young’s modulus and grain size. In addition, the aging-induced tetragonal to monoclinic phase transformation of the sintered zirconia was evaluated. It was revealed that the addition of CuO-MnO2 co-dopant was beneficial in enhancing the densification and mechanical properties of the ceramic particularly at low temperatures. A high fracture toughness of 5.5 MPam1/2 coupled with high hardness of 14.5 GPa was obtained for co-doped samples sintered at 1350 °C. However, the undoped ceramic exhibited better properties when sintered above 1350 °C. The study also found that the dopants did not prevent grain coarsening and hence did not suppress the aging-induced phase transformation particularly for samples sintered above 1350 °C.

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