Microwave sintering of Ti(C, N)-based cermet cutting tool material

作者：Yin, Zengbin^*; Yan, Shiyu; Xu, Weiwei; Yuan, Juntang

来源：Ceramics International, 2018, 44(1): 1034-1040.

DOI：10.1016/j.ceramint.2017.10.041

• Ti(C,N)
• Microwave sintering
• Mechanical properties
• Phase composition

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, Mo2C) on phase composition, microstructure and mechanical properties were studied. The cermet containing 5 wt% WC and 15 wt% Mo2C microwave sintered at 1400 degrees C 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 similar to 15.25% and 66.7 similar to 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.

• 出版日期2018-1
• 单位南京理工大学