Theoretical study on the elastic modulus of silicon nitride porous ceramics

Mengshi Chen; Ruohong Wang; Cong Ding; Yuan Lu; Cheng Bi

doi:10.1117/12.3016359

1 February 2024 Theoretical study on the elastic modulus of silicon nitride porous ceramics

Mengshi Chen, Ruohong Wang, Cong Ding, Yuan Lu, Cheng Bi

Proceedings Volume 13068, Fifth International Conference on Optoelectronic Science and Materials (ICOSM 2023); 1306810 (2024) https://doi.org/10.1117/12.3016359
Event: Fifth International Conference on Optoelectronic Science and Materials (ICOSM 2023), 2023, Hefei, China

Abstract

Flue gas corrosion, ash accumulation and fly ash wear have significant effect on the convective heat transfer surface such as super heater, economizer and air pre-heater arranged in the power plant boiler. The corrosion-resistance coating is often employed to protect or mitigate the damage from the flue gas corrosion and ash wear. The β-Si3N4 porous ceramics with high corrosion resistance and wear resistance can be used as the coating to protect the convective heat transfer surface. Due to the deformation of the heat transfer surface caused by vibration, creep and fatigue, the coating also can be affected, even destroyed when the deformation is too large. Elastic modulus is a parameter reflecting the ability to resist deformation. The effects of the porosity and temperature on the β-Si3N4 porous ceramics are theoretically studied by introducing the coupling effect between the thermal conductivity and elastic modulus, and the results are helpful to make guidance for the coating structure design and improve the service life of the heat transfer surface.

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

Citation Download Citation

Mengshi Chen, Ruohong Wang, Cong Ding, Yuan Lu, and Cheng Bi "Theoretical study on the elastic modulus of silicon nitride porous ceramics", Proc. SPIE 13068, Fifth International Conference on Optoelectronic Science and Materials (ICOSM 2023), 1306810 (1 February 2024); https://doi.org/10.1117/12.3016359

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