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ZHOU Yuzhang, WEI Wanxin, LUO Sichun, GUO Weiming, LIN Huatai. Effect of TiO2 Addition on Cutting Performance of Si3N4 Ceramic Cutting Tool[J]. Materials and Mechanical Engineering, 2022, 46(5): 64-69,76. DOI: 10.11973/jxgccl202205011
Citation: ZHOU Yuzhang, WEI Wanxin, LUO Sichun, GUO Weiming, LIN Huatai. Effect of TiO2 Addition on Cutting Performance of Si3N4 Ceramic Cutting Tool[J]. Materials and Mechanical Engineering, 2022, 46(5): 64-69,76. DOI: 10.11973/jxgccl202205011

Effect of TiO2 Addition on Cutting Performance of Si3N4 Ceramic Cutting Tool

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  • Received Date: March 11, 2021
  • Revised Date: February 27, 2022
  • Si3N4 ceramic with mass fraction of 5% TiO2 was prepared by gas pressure sintering and was made into a cutting tool. The effects of TiO2 on its microstructure, mechanical properties and cutting performance were investigated, and compared with Si3N4 ceramic sintered without TiO2. The results show that the sintered Si3N4 ceramic with TiO2 was mainly composed of long rod-shaped and equiaxed β-Si3N4 grains, accompanied by uniformly distributed TiN phases. Compared with the sintered Si3N4 ceramic without TiO2, the grains were refined, and the hardness increased while the fracture toughness decreased slightly. In the continuous cutting process of gray cast iron, Si3N4 ceramic cutting tool with TiO2 had a longer cutting life (effective cutting length of 2 410 m) and maintained the integrity of the cutting edge, and had less adhesive wear debris after cutting.
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