Master sintering curves of a nanoscale 3Y-TZP powder compacts

“…From these data it is suggested that the sintering kinetics is conduced by one densification mechanism up to a relative density about 0.70. At higher level of density probably the microstructure coarsening became operative [14,15].…”

Section: Resultsmentioning

confidence: 99%

Densification kinetics of ZrO2-based ceramics using a master sintering curve

Caruso

Mamana

Benavídez

2010

Journal of Alloys and Compounds

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“…Moreover, they found that a concurrent relatively small dc electric field E = 14 V/cm gave an additional reduction in d at each heating rate. The decrease in d with increase in dT/dt is in keeping with that reported by others [7][8][9]. A decrease in d with application of a small dc field during sintering also occurred in other studies on 3Y-TZP [10][11][12].…”

Section: Introductionsupporting

confidence: 88%

Effects of heating rate and DC electric field during sintering on the grain size distribution in fully sintered tetragonal zirconia polycrystals stabilized with 3% molar yttria (3Y-TZP)

2012

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The effects of sintering temperature rate ð _ T = 1.5-50°C/min) without and with an initial applied dc electric field (E o = 14 V/cm) on the grain size distribution (GSD) of fully sintered 3 mol%, yttria-stabilized tetragonal zirconia (3Y-TZP) was determined from SEM micrographs of fractured and polished-and-etched surfaces. No clear difference between the measurements on the two surfaces was detected. The grain size parameters characterizing the GSD tended to decrease with _ T and with E o . All of the GSD's however fit a single curve based on the Bitti-Di Nunzio grain coarsening model. This fit along with other considerations also give that the heating rate and electric field applied during sintering did not have a significant effect on the grain shape or the grain boundary energy in the fully sintered specimens. It is proposed that the decrease in grain size in the fully sintered condition by the application of an electric field during prior sintering results primarily from its effect on the driving force for grain growth, while the effect of the heating rate is on the grain mobility.

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“…Figure 5 shows the data plotted as a master sintering curve using this value of Q s . A similar analysis for a different 3YSZ powder reported by Mazaheri et al [19] gave an activation energy of 485 ± 12 kJ mol -1 , which is significantly lower than the present value. However, Matsui et al [20] report an activation energy of 683 kJ mol -1 from isothermal sintering experiments, in good agreement with the present results.…”

Section: Unconstrained Sinteringmentioning

confidence: 40%