标题：Preparation and Characterization of Si(3)N(4)/TiCN Composite Ceramic Tool Material
作者：Zheng, Guangming; Zhao, Jun; Zhou, Yonghui; Gao, Zhongjun
作者机构：[Zheng, Guangming; Zhao, Jun; Zhou, Yonghui; Gao, Zhongjun] Shandong Univ, Sch Mech Engn, Key Lab High Efficiency & Clean Mech Mfg MOE, Jinan 250061, 更多
会议名称：International Conference on Advances in Materials and Manufacturing Processes
会议日期：NOV 06-08, 2010
来源：NEW MATERIALS AND ADVANCED MATERIALS, PTS 1 AND 2
关键词：Ceramic tool materials; Hot-press-sintering; Microstructure; Mechanical; properties
摘要：Si(3)N(4)-based composite ceramic tool materials reinforced with TiC(0.5)N(0.5) particles were fabricated by using hot-press-sintering technique with Al(2)O(3) and Y(2)O(3) as sintering aids. The effects of the content of TiC(0.5)N(0.5) on the microstructure and properties of composite ceramic were investigated. The experimental results show that optimal mechanical properties were achieved for the composite with the addition of 20 vol.% TiC(0.5)N(0.5) microparticles, with the flexural strength, fracture toughness and Vicker's hardness being 838 MPa, 8.5 MPa.m(1/2) and 15.6 GPa. The fracture surface microstructure of the composites is characterized by scanning electron microscopy (SEM). Phase identification was carried out by X-ray diffraction (XRD). It was found that the microstructure of the material was homogenous and the elongated grain of beta-Si(3)N(4) was interlaced. And the fracture surfaces were observed to exhibit a mix of intergranular and transgranular fracture.