Microwave sintering of Ti(C, N)-based cermet cutting tool material
Source abstract
Abstract
Abstract A Ti(C, N)-based cermet cutting tool material with satisfactory properties was fabricated in an energy-efficient way by microwave sintering. The effect of microwave singtering process and the component ratio of carbide (WC, Mo 2 C) on phase composition, microstructure and mechanical properties were studied. The cermet containing 5 wt% WC and 15 wt% Mo 2 C microwave sintered at 1400 ℃ for 10 min, got the optimal mechanical properties. The relative density, fracture toughness and Vicker's hardness were 97.2 ± 0.5%, 8.24 ± 0.49 MPa m 1/2 and 17.54 ± 0.66 GPa, respectively. The microwave sintering temperature and holding time decreased by 1.4~15.25% and 66.7~96.1% in comparison with conventional sintering. Solid solution (Ti, Mo)C 2 and (W, Ti)C without nitrogen formed, which was different from the carbonitride solid solution that formed in conventional sintering. Additionally, long holding time brought about the formation of whisker-like materials, which benefited the fracture toughness.
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Research context
OpenAlex topics: Advanced materials and composites · Advanced ceramic materials synthesis · Microwave-Assisted Synthesis and Applications
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