Abstract
The secondary carbides have great impacts on microstructure and mechanical properties of Ti(C, N)-based cermets. In the study, Ti(C, N)-based cermets doped with different refractory rare metal carbides TaC/NbC/VC which was used for cutting tools were prepared by spark plasma sintering. The effects of TaC, NbC and VC on core-rim structure, grain size and mechanical properties of the cermets were studied. TaC/NbC/VC promotes the growth of solid solution phase, reduces the size of black core, increases the intergranular fracture and decreases the cleavage fracture. The solid solution effect and grain refinement effect of VC are stronger than that of NbC, while NbC is superior to TaC. Adding appropriate TaC/NbC/VC can improve the mechanical properties. The best comprehensive mechanical properties of Ti(C, N)-based cermets are achieved with the addition of 3 wt% VC, with a relative density of 99.5%, Vickers hardness of 18.4 ± 0.3GPa, fracture toughness of 10.7 ± 1.3 MPa·m1/2, and flexural strength of 947.4 ± 12.6 MPa.
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 callMore From: International Journal of Refractory Metals and Hard Materials
Disclaimer: 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.
