The study on the microstructure and mechanical properties of porous laminated ceramics composite

Yuan Lu; Cheng Bi; Debiao Li; Jianlong Zhang; Jie Zheng

doi:10.1117/12.3015606

6 February 2024 The study on the microstructure and mechanical properties of porous laminated ceramics composite

Yuan Lu, Cheng Bi, Debiao Li, Jianlong Zhang, Jie Zheng

Proceedings Volume 12979, Ninth International Conference on Energy Materials and Electrical Engineering (ICEMEE 2023); 129791K (2024) https://doi.org/10.1117/12.3015606
Event: 9th International Conference on Energy Materials and Electrical Engineering (ICEMEE 2023), 2023, Guilin, China

Abstract

The porous silicon nitride ceramics were prepared by carbothermic reduction-pressureless sintering with SiO₂ and α-Si3N4 in nitrogen. By changing the relative content of α-Si₃N₄, SiO₂ and C powder in the raw material, the porosity controlled porous silicon nitride that consists mostly of the β-Si₃N₄ grains was formed. The porous laminated silicon nitride ceramics composite with three layers were fabricated by this technique. The influence of the α-Si₃N₄ content for the intermediate layer on the properties of the porous laminated silicon nitride ceramics composite was researched. When the linear shrinkage of the intermediate layer and superficial layer was very different, although it was a weak interfacial bonding, but the interfacial residual stress was very beneficial to the mechanical properties of the porous laminated silicon nitride. When the linear shrinkage and porosity of the intermediate layer and superficial layer were similar, it caused the conversion of weak interfacial bonding into the strong interfacial bonding. The three-layer porous laminated silicon nitride ceramics composite exhibited outstanding mechanical properties.

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Yuan Lu, Cheng Bi, Debiao Li, Jianlong Zhang, and Jie Zheng "The study on the microstructure and mechanical properties of porous laminated ceramics composite", Proc. SPIE 12979, Ninth International Conference on Energy Materials and Electrical Engineering (ICEMEE 2023), 129791K (6 February 2024); https://doi.org/10.1117/12.3015606

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