Investigation of sintering behavior of ZrO2 (Y) ceramic green body by means of non-isothermal dilatometry and thermokinetic analysis

Суржиков, А. П.; Ghyngazov, S. A.; Frangul'yan, T. S.; Vasil’ev, I. P.; Chernyavskii, A. V.

doi:10.1007/s10973-016-5966-9

Cited by 16 publications

(4 citation statements)

References 24 publications

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“…TGA result in Figure 1 reveal a minor change (∼0.2%) in weight loss percent, and it can be considered as any moister content in the powder [30,31]. The TGA curve becomes stable after 400°C; therefore, the powder was heated at 400°C and results were compared with the as-received powder.…”

Section: Resultsmentioning

confidence: 99%

“…The TGA curve becomes stable after 400°C; therefore, the powder was heated at 400°C and results were compared with the as-received powder. Inhomogeneity in the heating curve in the TGA results (Figure 1) can be related to machine error and/or powder attrition with the escape of the gases from the bulk powder [30,31]. The particle SD results of the TZ-3Y-E powder particles in asreceived and heated at 400°C are shown in image Figure 5(a,b).…”

Section: Resultsmentioning

confidence: 99%

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Stability of 3Y-TZP nano zirconia powder after hydrothermal ageing treatment

Ahmed

Zou

Yan

2022

Advances in Applied Ceramics

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Yttria-stabilised zirconia (Y-TZP) ceramics are widely used for dental and prosthesis applications; however, they are susceptible to low-temperature degradation (LTD). Despite several explanations of the LTD mechanism, it is not fully understood yet. Commercial TZ-3Y-E grade powder was used to further study the LTD before sintering it. Hydrothermal ageing treatment was applied to samples at 134°C for 5 h. STA analysis confirmed that the powder is binderfree. SEM and XRD analyses show homogeneous particle size and tetragonal as a major phase and monoclinic as a minor phase, respectively. BET method analysis shows a slight change in the pore size, pore volume and surface area of the powder samples, before and after heating at 400°C. Particle size distribution (SD) calculated from SEM images shows ∼ 40-50 nm particle size range of the powders. The results show that LTD was not observed in the powder after hydrothermal ageing treatment.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Stability of 3Y-TZP nano zirconia powder after hydrothermal ageing treatment

Ahmed

Zou

Yan

2022

Advances in Applied Ceramics

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“…The features of the powder preparation process in plasma-chemical synthesis ensure the formation of ultra-fine particles, with a significant part of the particles attaining less than 100 nm in size [20]. At the same time, most of the particles are more than 100 nm and up to 1 μm in size.…”

Section: Introductionmentioning

confidence: 99%

Investigation with using thermal analysis of gas evolution and sintering of nanopowders of zirconia prepared by sol-gel method

Sheveleva¹,

Shevelev²,

Sokolovskiy³

et al. 2020

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Thermal and XRD analyses were used to study partially stabilized zirconia powders produced by sol-gel method in order to investigate gas evolution in annealing in air and densification behavior of these powders in compaction and subsequent sintering. It was found that the powders of the initial gel contain a large amount of gas adsorbates. The amount of adsorbates decreases as the annealing temperature grows. At annealing temperature of 700 ºC, adsorbates are completely removed from the powders and the latter obtain a crystalline structure with a predominant tetragonal phase. Gas adsorbates affect densification of powder compacts during sintering and facilitate the production of ceramics with a porosity of not more than 5 %. It is shown that the production of low porosity ceramics is complicated even though powders subjected to annealing may contain nano-sized impurities or be free of these. Low-melting additives are proposed to be used for ceramics production.

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“…In the literature, data are many papers about the thermal behavior of yttria-stabilized zirconia ceramic [21][22][23]. The zirconia composites with Ti particle are still the new materials, which require the investigation of the thermal behavior during the sintering process.…”

Section: Introductionmentioning

confidence: 99%

Sintering behavior and thermal expansion of zirconia–titanium composites

Łada

Miazga

Konopka

et al. 2017

J Therm Anal Calorim

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The dilatometric and thermogravimetric methods were used to investigate the sintering conditions of 3Y-ZrO 2 and 3Y-ZrO 2 -Ti composites. For the materials preparation, the nanometric zirconia stabilized by 3 mol% Y 2 O 3 powder and micrometric titanium powder (3 and 10 vol%) were used. The green body samples were formed by slip casting method. The morphology of samples microstructures was determined by SEM observations. The stereological analysis of zirconia and zirconia-titanium composites was carried out using computer program. The density was measured using the Archimedes method. The hardness of sinters was also investigated. Addition of Ti into ZrO 2 influenced the sintering behavior and thermal expansion of obtained composites. The analysis of the sintering process and characteristic temperatures confirmed the increase of onset and final temperature of shrinkage with the increase in Ti content. The changes of the thermal expansion curves for the pure zirconia and 3Y-ZrO 2 -Ti composites were the result of the aTi ? bTi transformation and the transition temperature of the zirconia m ? t transformation. The zirconia and composite samples were characterized by relative density about 98%, close to theoretical density. The slight growth of zirconia grains was observed.

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Investigation of sintering behavior of ZrO2 (Y) ceramic green body by means of non-isothermal dilatometry and thermokinetic analysis

Cited by 16 publications

References 24 publications

Stability of 3Y-TZP nano zirconia powder after hydrothermal ageing treatment

Stability of 3Y-TZP nano zirconia powder after hydrothermal ageing treatment

Investigation with using thermal analysis of gas evolution and sintering of nanopowders of zirconia prepared by sol-gel method

Sintering behavior and thermal expansion of zirconia–titanium composites

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