Effect of sintering holding time on low-temperature degradation of yttria stabilised zirconia ceramics

Sutharsini, U.; Ramesh, S.; Wong, Yew Hoong; Misran, Halina; Yusuf, Farazila; Tan, C.Y.; Purbolaksono, J.; Teng, W.D.

doi:10.1179/1432891714z.000000000988

Cited by 3 publications

(6 citation statements)

References 27 publications

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“…There are many TSS profiles conducted to control the grain growth of Y-TZP ceramics [1,4,5,8,[24][25][26][27][28][29][30][31]61]. Only few researchers successfully obtained fully dense ceramics with controlled grain growth (<5 times of powder size) [1,4,5,25,28,29,31,62]. Among these studies, Binner et al [31] and others [1,29] successfully sintered nanostructured zirconia ceramics.…”

Section: Y-tzp Ceramicsmentioning

confidence: 99%

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Two-Step Sintering of Ceramics

Sutharsini¹,

Murugathas²,

RameshSingh³

2018

Sintering of Functional Materials

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Sintering is a critical phase in the production of ceramic bodies. By controlling the density and microstructure formation, sintering now emerged as a processing technology of ceramic materials. Tailoring the structural, mechanical, electrical, magnetic and optical properties is widening the application of ceramics in various fields. Recently, many advanced sintering methods have reported to fabricate ceramic materials with controlled properties. Two-stage sintering (TSS) is one of the simple and cost-effective methods to obtain near-theoretical density materials with controlled grain growth without adding any dopants. Many recent works have reported the use of TSS as a processing method to fabricate nanoceramics for various applications. With this background, this chapter reviews the advantages of TSS in ceramic preparation based on properties and materials and explores the future directions.

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Section: Y-tzp Ceramicsmentioning

confidence: 99%

“…Recently Sutharsini et al [62] sintered fully dense (99% of TD) 3Y-TZP via TSS with average grain size 290 nm. The sintered ceramics exhibited better hydrothermal ageing resistance against the conventionally sintered 3Y-TZP ceramics.…”

Section: Sintering Of Functional Materialsmentioning

confidence: 99%

Two-Step Sintering of Ceramics

Sutharsini¹,

Murugathas²,

RameshSingh³

2018

Sintering of Functional Materials

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“…The sintering condition is a predominant factor influencing both the mechanical properties and LTD behaviour of 3Y-TZPs.However, the mechanism was not well studied and different manufacturers produce dental 3Y-TZP materials at different sintering conditions. Two-step sintering (TSS) with a high first step sintering temperature and a lower second step holding temperature is a promising method used to obtain high-density bodies and smaller grain sizes [13][14][15]. In this work, the effect of TSS and second step sintering holding times on ageing and densification of 3Y-TZP ceramics was investigated.…”

Section: Introductionmentioning

confidence: 99%

Effect of Sintering Holding Time on Tetragonal Phase Stability of Yttria Stabilized Zirconia Ceramics

Vignarajah

Murugathas

Sutharsini

2019

KEM

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In this study, the effect of second step sintering holding time on LTD of 3 mol% yttria tetragonal zirconia polycrystals (3Y-TZP) ceramic was studied. The Zirconia powder was die pressed followed by cold isostatically pressed (CIP) at 200 MPa, and the samples were initially heated to a first step temperature of 1400°C with constant heating rate 10°C/min and the samples were stand still for 1 minute. Then cooled down to the second step temperature of 1200°C and maintained at that temperature for 2 and 10 hours before cooled down to the room temperature. The other sample was sintered by using Single Step Sintering (SSS) at 1400°C for two hours. The phase content in the zirconia samples was measured by using X-ray diffractometer. Average grain size was calculated by using Field Emission Scanning Electron Microscope (FESEM). The low temperature degradation study was conducted in an autoclave containing superheated steam at 180°C and 10 bar pressures for periods up to 60 hours. Results revealed that the two-step sintering (TSS) effectively controlled the grain growth than SSS and subsequently ageing. Increase in second step sintering holding time from two to ten hours also increased the densification and hydrothermal ageing resistance of Y-TZP ceramics.

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“…Grain size of the 3Y-TZP was controlled by tailoring the sintering condition (Mazaheri et al, 2008;Sutharsini et al, 2018Sutharsini et al, , 2017Sutharsini et al, , 2014bVignarajah et al, 2019). Grain size increased with increasing sintering temperature (Ramesh & Gill, 2001;Ramesh et al, 2013Ramesh et al, , 2016Ramesh et al, , 2018Sutharsini et al, 2014a;b, 2017Ting et al, 2016;Ubenthiran et al, 2018;Dhuban et al, 2019;Ng et al, 2019;Vignarajah et al, 2019).…”

Section: June 2021mentioning

confidence: 99%

“…However, high temperature sintering is important for densification which directly influences the mechanical properties. Two step sintering is a promising approach to achieve high densities with controlled grain growth (Mazaheri et al, 2008;Sutharsini et al, 2014bSutharsini et al, , 2017Sutharsini et al, , 2018Vignarajah et al, 2019). In the two-step sintering technique, the samples are sintered at higher temperature for a short time to achieve critical grain size and then it is sintered at lower temperature for a long time to reach maximum densification.…”

Section: June 2021mentioning

confidence: 99%

Surface yttria content and hydrothermal ageing behaviour of two step sintered 3Y-TZP ceramics

Sutharsini

Murugathas

Ramesh

et al. 2021

J. Natn. Sci. Foundation Sri Lanka

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In this work the effect of surface yttria concentration on hydrothermal ageing of two-step sintered (TSS) 3 mol. % yttria stabilised tetragonal zirconia polycrystalline (3Y-TZP) ceramics was investigated. Green compacts were prepared by bench pressing and sintered using a two-step sintering with first step sintering temperature of 1400°C for one minute and second step sintering temperature of 1200°C at different holding times of 2, 10 and 20 hours. Surface morphology and surface yttria content of the sintered samples were investigated by using Xray florescence spectroscopy (XRF) and field emission scanning electron microscopy (FESEM), respectively. It was found that the TSS effectively suppressed the grain growth. Increasing the holding time increased densification. Also, an increment in the surface yttria content with increasing holding time was observed. The ageing studies were conducted in an autoclave containing super-heated steam at 180°C and 10 bar pressure for 100 hours. Ageing resistance increased with increasing second step sintering time. The enhanced hydrothermal degradation of lower holding time samples can be attributed to the deficiency of surface yttria. Effect of ageing on surface yttria concentration and surface morphology were also investigated by using XRF and FESEM, respectively. The surface yttria concentration decreased with ageing which confirms leach out of surface yttria during hydrothermal ageing.

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Effect of sintering holding time on low-temperature degradation of yttria stabilised zirconia ceramics

Cited by 3 publications

References 27 publications

Two-Step Sintering of Ceramics

Two-Step Sintering of Ceramics

Effect of Sintering Holding Time on Tetragonal Phase Stability of Yttria Stabilized Zirconia Ceramics

Surface yttria content and hydrothermal ageing behaviour of two step sintered 3Y-TZP ceramics

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