Abstract
A type of Al2O3/TiC composite ceramic tool material reinforced with graphene platelets (GPLs) was fabricated by microwave sintering. The effects of GPLs content on the microstructure, mechanical properties and toughness mechanisms of Al2O3/TiC/GPLs composite ceramic tool materials were studied. The experimental results showed that the microstructure of the composite became finer with the incorporation of GPLs. The optimal mechanical properties were achieved with 0.2wt% GPLs. The relative density, Vickers hardness and fracture toughness were 97.7±0.2, 18.5±0.5GPa and 8.7±0.4MPam1/2, respectively. Compared to Al2O3/TiC composites, the Vickers hardness decreased by 12.7%, but the fracture toughness increased by 67.3%. Also, agglomerated GPLs and pores were observed in the new composite ceramic tool materials. The toughening mechanisms were crack deflection, crack bridging, crack branching and pull-out of GPLs.
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.
