Abstract
We report the fabrication of silicon nitride (Si3N4) ceramics with high flexural strength by oscillatory pressure sintering (OPS). The effects of the sintering procedure on the grain growth, microstructure evolution, and mechanical properties of Si3N4 were investigated. It was found that, in comparison to the traditional gas pressure sintering technique, the OPS process produced Si3N4 ceramics with higher density with a shorter sintering time and lower sintering temperature, leading to products with higher bending strength and Vickers hardness. Furthermore, the OPS promoted the α-β phase transformation of Si3N4, which facilitated the ion diffusion rate in the liquid phase and increased the aspect ratio of the formed β-Si3N4 grains. The Si3N4 ceramics sintered at 1720 °C by OPS exhibited high bending strength and Vickers hardness of 1432 ± 51 MPa and 16.14 ± 0.38 GPa, respectively, representing their potential for exploring ceramics with high performances.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
