Advancements in Sintering: Exploring Emerging Techniques and Future Perspectives

DOI: 10.62564/M4-SG1848

Salvatore Grasso

School of Engineering and Material Science, Queen Mary University of London, UK


Ultrafast High-temperature Sintering (UHS) allows consolidation of ceramics in just a few tens of seconds. The green body is placed within a heater energized by the Joule effect at temperatures up to 3000 °C. The accelerated UHS thermo-kinetics induces unique far from equilibrium features. UHS clearly opens up novel opportunities in ceramics consolidation as it combines together ultrarapid firing cycles and ultrahigh temperatures. The talk summarizes recent upgrades of the UHS experimental setup in order to consolidate large parts [1] while using less energy [2] and avoiding undesired carbon contamination [3]. A direct comparison with conventional sintering confirms the “favorable” impact of accelerated heating and colling rates in terms of i) dramatic (up to 95%) reduction in energy consumed during the sintering process [4] ii) straightforward processing of transparent ceramics without need for external pressure and/or reducing atmosphere (i.e., hydrogen) [5] iii) suppressed volatilization of light elements [6] iv) enhanced sinter-activity in high entropy oxides [7].

Keywords


Acknowledgments
Not provided

References
[1] F. Zuo et al., “Upscaling Ultrafast High-Temperature Sintering (UHS) to consolidate large-sized and complex-shaped ceramics,” Scr. Mater., vol. 221, p. 114973, Dec. 2022 [2] J. Dong et al., “Thermally-insulated ultra-fast high temperature sintering (UHS) of zirconia: A master sintering curve analysis,” Scr. Mater., vol. 203, p. 114076, 2021 [3] J. Wu et al., “Carbon free ultra-fast high temperature sintering of translucent zirconia,” Scr. Mater., vol. 210, p. 114476, 2022 [4] R. X. Luo et al., “Ultrafast high-temperature sintering of silicon nitride: A comparison with the state-of-the-art techniques,” J. Eur. Ceram. Soc., vol. 41, no. 13, pp. 6338–6345, 2021, [5] M. Kermani et al., “Ultra-fast High-temperature Sintering (UHS) of translucent alumina,” Open Ceram., vol. 9, p. 100202, 2022 [6] Y. Lin et al., “Ultrafast high-temperature sintering (UHS) of Li1.3Al0.3Ti1.7(PO4)3,” Ceram. Int., vol. 47, no. 15, pp. 21982–21987, 2021 [7] L. Spiridigliozzi et al., “Ultra-fast high-temperature sintering (UHS) of Ce0.2Zr0.2Y0.2Gd0.2La0.2O2−δ fluorite-structured entropy-stabilized oxide (F-ESO),” Scr. Mater., vol. 214, p. 114655, Jun. 2022