以碳化硅纤维为纤维增强剂,纳米级碳化钛为粒子增强剂,氮化硅粉末为基体,制备Si3N4/SiCw/TiCp系纳米复合陶瓷刀具材料.采用XRD和SEM分别表征复合氮化硅烧结体的组成和表面微观形貌.采用三点弯曲法,用PSD-5TSJTH型万能试验机测量样品的密度和抗弯强度.对于制备的Si3N4/SiCw/TiCp系纳米复合陶瓷刀具材料进行断续切削试验和连续切削试验.结果表明,制备的Si3 N4/SiCw/TiCp系纳米复合陶瓷刀具的断裂韧性最高达9.5 MPa.m0.5,抗弯强度达780 MPa,显著地超过一般氧化铝陶瓷切削刀具材料的韧性值.断续切削时刀具的寿命比氧化铝陶瓷刀具更长1.6～15倍,连续切削时也具有良好的耐磨性能.
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