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All Journal Justek : Jurnal Sains Dan Teknologi
Asep Saputra
Universitas PGRI Palembang
Computer Science & IT Control & Systems Engineering Education Mathematics

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The Effect Of Porosity On The Critical Temperature Of Porous Alumina Ceramics Asep Saputra; Parmin Lumban Toruan; Atina Atina
Justek : Jurnal Sains dan Teknologi Vol 9, No 3 (2026): September
Publisher : Unversitas Muhammadiyah Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31764/justek.v9i3.40611

Abstract

Porous alumina ceramics are widely used in high-temperature applications due to their thermal stability; however, they are vulnerable to thermal shock, which may induce microcrack formation due to thermal stress. Although the influence of porosity on thermal shock resistance has been widely investigated, numerical studies on its effect on the critical cracking temperature remain limited. This study aims to analyze the effect of porosity on the critical temperature of porous alumina ceramics under thermal shock using a Finite Difference Method (FDM) simulation. Porosity variations of 10%, 20%, 30%, and 40% were considered. Thermal shock was modeled by applying a sudden temperature of 2000 K on one side of the material, while the initial temperature was set at 300 K. The resulting temperature distributions were used to evaluate thermal stress and determine the critical temperature for each porosity level. The results show that increasing porosity reduces the maximum thermal stress from 265 MPa at 10% porosity to 60 MPa at 40% porosity. The critical temperature increases from 533 K at 10% porosity to 663 K at 30% porosity, then decreases to 583 K at 40% porosity. These findings provide insight into the role of porosity in controlling thermal shock resistance and can support the optimization of porous alumina ceramics for high-temperature applications.
Co-Authors Atina, Atina Parmin Lumbantoruan