Abstract
AbstractSilicon nitride (Si3N4) ceramics containing various tungsten carbide (WC) content were prepared by spark plasma sintering (SPS) with Al2O3and Y2O3as sintering aids, andWCnanoparticles were introduced via the mechanical ball milling method in the present work. The influence ofWCnanoparticles’ content on the densification, microstructure, and mechanical properties of such ceramics was investigated. The results showed that the incorporation ofWCnanoparticles promoted the densification of Si3N4ceramics and the growth of β‐Si3N4grains. In comparison with the specimen withoutWCnanoparticles (879.9MPa), the flexural strength of the specimens containingWCnanoparticles increased markedly; a maximum flexural strength of 1367.7MPa can be achieved at the sintering temperature of 1550°C and the milling time of 36 hours.
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