Cutting performance and wear mechanism of spark plasma–sintered silicon nitride ceramics tool in dry turning of 41Cr4 hardened steel

Wang, Zhenhua; Sun, Ning; Cao, Liyan; Yin, Zengbin; Wang, Yulin; Yuan, Jun

doi:10.1007/s00170-020-05277-y

Cited by 7 publications

(1 citation statement)

References 35 publications

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“…Compared with other ceramic cutting tools [ 8 , 9 ], Si 3 N 4 ceramics as cutting tool materials are more suitable for applications in the field of metal cutting [ 10 , 11 ], which will reduce manufacturing costs and enhance machining efficiency in actual production. In particular, Si 3 N 4 ceramic cutting tools [ 12 ] with high hardness can be also applied in machining difficult-to-machine materials [ 13 ] such as cemented carbide, nickel-base superalloy [ 14 ], grey cast iron, etc. Unfortunately, the application extents of Si 3 N 4 ceramic cutting tools [ 15 ] in high-speed machining are generally restricted by expensive raw materials, inferior comprehensive mechanical properties, high-cost preparation with high sintering temperature (≥1700 °C) [ 16 , 17 ] and long holding time (≥1 h) [ 18 ].…”

Section: Introductionmentioning

confidence: 99%

Synergistic Reinforcement of Si3N4 Based Ceramics Fabricated via Multiphase Strengthening under Low Temperature and Short Holding Time

Huang,

Lv,

Dong

et al. 2023

Materials

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Si3N4 ceramic as a tool material shows promising application prospects in high-speed machining fields; however, the required high mechanical properties and low-cost preparation of Si3N4 ceramic tool materials restrict its application. Herein, synergistic reinforced Si3N4 ceramic tool materials were fabricated by adding β-Si3N4 seeds, inexpensive Si3N4 whiskers and TiC particles into coarse commercial Si3N4 powder (D50 = 1.5 μm), then sintering by hot-pressing with low temperature and short holding time (1600 °C—30 min—40 MPa). The phase assemblage, microstructure evolution and toughening mechanisms were investigated. The results reveal that the sintered Si3N4 ceramics with synergistic reinforcement, compared to those with individual reinforcement, present an enhancement in relative density (from 94.92% to 97.15%), flexural strength (from 467.56 ± 36.48 to 809.10 ± 45.59 MPa), and fracture toughness (from 8.38 ± 0.19 to 10.67 ± 0.16 MPa·m1/2), as well as a fine Vickers hardness of 16.86 ± 0.19 GPa. Additionally, the various reinforcement modes of Si3N4 ceramics including intergranular fracture, crack deflection, crack bridging and whiskers extraction were observed in crack propagation, arising from the contributions of the added β-Si3N4 seeds, Si3N4 whiskers and TiC particles. This work is expected to serve as a reference for the production of ceramic cutting tools.

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