Effect of two-step sintering on the hydrothermal ageing resistance of tetragonal zirconia polycrystals

U. Sutharsini; M. Thanihaichelvan; C. H. Ting; S. Ramesh; C. Y. Tan; Hari Chandran; Ahmed A.D. Sarhan; S. Ramesh; I. Urriés

doi:10.1016/j.ceramint.2017.03.052

Effect of two-step sintering on the hydrothermal ageing resistance of tetragonal zirconia polycrystals

U. Sutharsini, M. Thanihaichelvan, C. H. Ting, S. Ramesh^*, C. Y. Tan, Hari Chandran, Ahmed A.D. Sarhan, S. Ramesh^*, I. Urriés

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

105 Scopus citations

Abstract

The effects of two-step sintering (TSS) on the mechanical properties and hydrothermal ageing resistance of yttria-stabilized tetragonal zirconia polycrystals (Y-TZP) were investigated. In TSS, the first step involved heating the samples up to 1400 °C at a heating rate of 10 °C/min and holding the samples at this temperature for 1 min. The second step involved sintering by cooling the samples down to 1200 °C and holding the samples at this temperature for various holding times (t) ranging from 0 to 30 h before cooling to room temperature. Moreover, TSS promoted densification with increasing holding time without sacrificing the mechanical properties of the sintered body and causing abnormal grain growth. The average grain size was found not to be affected by the long holding times, and the final microstructure composed of a uniformly distributed tetragonal grain having sizes ranging from 0.24 to 0.26 µm. The beneficial effect of TSS in suppressing the hydrothermal ageing of Y-TZP has been revealed in the present work. In particular, samples sintered at t=20 and 30 h exhibited excellent resistance to low-temperature degradation when exposed to superheated steam at 180 °C, attributed mainly to the enhance densification of the sintered bodies.

Original language	English
Pages (from-to)	7594-7599
Number of pages	6
Journal	Ceramics International
Volume	43
Issue number	10
DOIs	https://doi.org/10.1016/j.ceramint.2017.03.052
State	Published - 1 Jul 2017

Bibliographical note

Publisher Copyright:
© 2017 Elsevier Ltd and Techna Group S.r.l.

Keywords

Hydrothermal ageing
Mechanical properties
Two-step sintering
Y-TZP

ASJC Scopus subject areas

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

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10.1016/j.ceramint.2017.03.052

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title = "Effect of two-step sintering on the hydrothermal ageing resistance of tetragonal zirconia polycrystals",

abstract = "The effects of two-step sintering (TSS) on the mechanical properties and hydrothermal ageing resistance of yttria-stabilized tetragonal zirconia polycrystals (Y-TZP) were investigated. In TSS, the first step involved heating the samples up to 1400 °C at a heating rate of 10 °C/min and holding the samples at this temperature for 1 min. The second step involved sintering by cooling the samples down to 1200 °C and holding the samples at this temperature for various holding times (t) ranging from 0 to 30 h before cooling to room temperature. Moreover, TSS promoted densification with increasing holding time without sacrificing the mechanical properties of the sintered body and causing abnormal grain growth. The average grain size was found not to be affected by the long holding times, and the final microstructure composed of a uniformly distributed tetragonal grain having sizes ranging from 0.24 to 0.26 µm. The beneficial effect of TSS in suppressing the hydrothermal ageing of Y-TZP has been revealed in the present work. In particular, samples sintered at t=20 and 30 h exhibited excellent resistance to low-temperature degradation when exposed to superheated steam at 180 °C, attributed mainly to the enhance densification of the sintered bodies.",

keywords = "Hydrothermal ageing, Mechanical properties, Two-step sintering, Y-TZP",

author = "U. Sutharsini and M. Thanihaichelvan and Ting, \{C. H.\} and S. Ramesh and Tan, \{C. Y.\} and Hari Chandran and Sarhan, \{Ahmed A.D.\} and S. Ramesh and I. Urri{\'e}s",

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doi = "10.1016/j.ceramint.2017.03.052",

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T1 - Effect of two-step sintering on the hydrothermal ageing resistance of tetragonal zirconia polycrystals

AU - Sutharsini, U.

AU - Thanihaichelvan, M.

AU - Ting, C. H.

AU - Ramesh, S.

AU - Tan, C. Y.

AU - Chandran, Hari

AU - Sarhan, Ahmed A.D.

AU - Ramesh, S.

AU - Urriés, I.

PY - 2017/7/1

Y1 - 2017/7/1

N2 - The effects of two-step sintering (TSS) on the mechanical properties and hydrothermal ageing resistance of yttria-stabilized tetragonal zirconia polycrystals (Y-TZP) were investigated. In TSS, the first step involved heating the samples up to 1400 °C at a heating rate of 10 °C/min and holding the samples at this temperature for 1 min. The second step involved sintering by cooling the samples down to 1200 °C and holding the samples at this temperature for various holding times (t) ranging from 0 to 30 h before cooling to room temperature. Moreover, TSS promoted densification with increasing holding time without sacrificing the mechanical properties of the sintered body and causing abnormal grain growth. The average grain size was found not to be affected by the long holding times, and the final microstructure composed of a uniformly distributed tetragonal grain having sizes ranging from 0.24 to 0.26 µm. The beneficial effect of TSS in suppressing the hydrothermal ageing of Y-TZP has been revealed in the present work. In particular, samples sintered at t=20 and 30 h exhibited excellent resistance to low-temperature degradation when exposed to superheated steam at 180 °C, attributed mainly to the enhance densification of the sintered bodies.

AB - The effects of two-step sintering (TSS) on the mechanical properties and hydrothermal ageing resistance of yttria-stabilized tetragonal zirconia polycrystals (Y-TZP) were investigated. In TSS, the first step involved heating the samples up to 1400 °C at a heating rate of 10 °C/min and holding the samples at this temperature for 1 min. The second step involved sintering by cooling the samples down to 1200 °C and holding the samples at this temperature for various holding times (t) ranging from 0 to 30 h before cooling to room temperature. Moreover, TSS promoted densification with increasing holding time without sacrificing the mechanical properties of the sintered body and causing abnormal grain growth. The average grain size was found not to be affected by the long holding times, and the final microstructure composed of a uniformly distributed tetragonal grain having sizes ranging from 0.24 to 0.26 µm. The beneficial effect of TSS in suppressing the hydrothermal ageing of Y-TZP has been revealed in the present work. In particular, samples sintered at t=20 and 30 h exhibited excellent resistance to low-temperature degradation when exposed to superheated steam at 180 °C, attributed mainly to the enhance densification of the sintered bodies.

KW - Hydrothermal ageing

KW - Mechanical properties

KW - Two-step sintering

KW - Y-TZP

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Effect of two-step sintering on the hydrothermal ageing resistance of tetragonal zirconia polycrystals

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

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