标题：Preparation and characterization of Si3N4/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 ] Key Laboratory of High Efficiency and Clean Mechanical Manufacture of MOE, School of Mech 更多
会议名称：2010 International Conference on Advances in Materials and Manufacturing Processes, ICAMMP 2010
会议日期：November 6, 2010 - November 8, 2010
来源：Advanced Materials Research
摘要：Si3N4-based composite ceramic tool materials reinforced with TiC0.5N0.5 particles were fabricated by using hot-press-sintering technique with Al2O3 and Y 2O3 as sintering aids. The effects of the content of TiC0.5N0.5 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.% TiC0.5N0.5 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 β-Si3N4 was interlaced. And the fracture surfaces were observed to exhibit a mix of intergranular and transgranular fracture. © (2011) Trans Tech Publications, Switzerland.