Abstract
Ti(C,N)–34.2wt% TiB2–5wt% Ni composite ceramic cutting tool material was fabricated by vacuum hot pressing sintering method in six processes with different holding stages, holding time and heating rates. The influences of sintering processes on the mechanical properties and microstructure were studied. The polished surface and fracture surface of Ti(C,N)–TiB2–Ni ceramics were observed by scanning electron microscope, energy-dispersive spectrometry and X-ray diffraction, and the relationships between mechanical properties and microstructure were investigated. The mechanical properties and microstructure depended primarily on the different holding stages, holding time and heating rates. The results showed that the Ti(C,N)–TiB2–Ni composite ceramic cutting tool material sintered by SP3 process (three holding stages, holding time of 30min and the heating rate of 50°C/min) exhibited the optimum mechanical properties because of its finer microstructure, and the corresponding values were as follows: flexural strength of 967.7±90MPa, fracture toughness of 7.07±0.8MPa/m1/2 and Vickers hardness of 20.22±2.1GPa respectively.
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.
