Study on Mechanical Properties and Toughening Mechanism of MWCNTs/Ti(C, N) Cermets-based Composites

摘要：

　　MWCNTs/Ti(C,N) cermets-based composites were prepared by vacuum hot-pressing sintering method.The mechanical properties of samples were examined.XRD and SEM were used to investigate the crystal structure of the composites and microstructure of fractures surface,respectively.The toughening mechanism of composites was discussed particularly.The experimental results showed that the optimum comprehensive mechanical properties of samples were obtained by adding 1 wt% MWCNTs in the composites.The bending strength,Vickers hardness and fracture toughness of the composites were 1275.14MPa,22.75GPa and 10.60 MPa·m1/2,respectively,which were improved by 16.89%,17.15% and 25.59%,respectively,compared to the Ti(C,N)-based cermets without MWCNTs.Bridging and pulling out of MWCNTs,crack deflection,residual stress toughening and micro-voids toughening were attributed to the toughening mechanism of the composites.

关键词： MWCNTs Ti(C, N) Cermets-based Composites Toughening mechanism

作者: Shuoqi Liu Weiliang Liu

作者单位: Jingdezhen Ceramic Institute,Jingdezhen 333001,China

会议类型: 国际会议

会议名称: 3rd International Conference on Testing and Evalution of Inorganic Materials(第三届无机材料测试与评价学术年会(TEIM2012))

会议地点: 景德镇

会议语种:英文

页码: 291-294

在线出版日期: 2012-10-15（万方平台首次上网日期，不代表论文的发表时间）