Noteworthy differences between vertical and horizontal sintering of ceramic samples

Lakshya, Annu Kumar; Ali, Faiz; Arun, Abhishek; Chowdhury, Anirban

doi:10.1016/j.jallcom.2022.166309

Cited by 6 publications

(2 citation statements)

References 34 publications

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“…Placing ceramic pellets in a vertical position during sintering yielded significant advantages in both cases. Given the comparatively low thermal conductivity of ceramics, this research highlighted the significance of proper sample placement to ensure effective heat transfer during conventional sintering 19 …”

Section: Introductionmentioning

confidence: 99%

“…Given the comparatively low thermal conductivity of ceramics, this research highlighted the significance of proper sample placement to ensure effective heat transfer during conventional sintering. 19 Even though the thermal gradient between the top and bottom surfaces in 3 mol.% yttria-stabilized zirconia (3YSZ) and LC50 has been proposed as the reason for the inhomogeneous phase formation or texture, further work is needed to prove that beyond any doubt. Finite element modeling (FEM) is a powerful numerical tool that can help us elucidate the overall process.…”

Section: Introductionmentioning

confidence: 99%

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Finite element analysis of temperature distribution in 3YSZ ceramics during conventional sintering

Kumar Singh,

Lakshya,

Chowdhury

et al. 2024

Int J Applied Ceramic Tech

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The presence of a temperature gradient (if any) within the ceramic sample is casually ignored during the sintering of ceramic shapes. The present work exposes some serious repercussions of such a thought process and provides simple solutions to mitigate the same; 3 mol.% yttria‐doped zirconia ceramic was used for this study. With the help of the combinatorial finite element analysis (FEA) model and real‐life experiments, our work illustrates the complex interplay of heat transfer mechanisms and reveals the dynamic nature of temperature distribution during the heating and cooling cycles of ceramics. Although the rate of heating is usually assigned as the most important factor during sintering, the present study shows that variations in heat transfer mechanism and sample geometry contribute very strongly to overall temperature distribution during the heating, holding, and cooling cycles. Along with of vertical positioning of the samples (inside the furnace), a bottom supporting ceramic plate with a high thermal conductivity can also help in reducing the temperature gradient between the top and bottom of the ceramic samples. Overall, exposing the sample most for the radiative heat transfer holds the key to successful sintering in order to avoid any phase, compositional, or microstructural heterogeneity across the thickness of the specimen.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%