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

SiN 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 SiN ceramic tool materials restrict its application. Herein, synergistic reinforced SiN ceramic tool materials were fabricated by adding β-SiN seeds, inexpensive SiN whiskers and TiC particles into coarse commercial SiN powder (D = 1.5 μm), then sintering by hot-pressing with low temperature and short holding time (1600 °C-30 min-40 MPa).