摘要
在氮气环境下,采用微波烧结技术制备氮化硼纳米粒子增强Ti(C,N)基金属陶瓷,采用SEM观察了其显微组织,并考察了BN含量对材料力学性能的影响.研究表明:纳米氮化硼对Ti(C,N)基金属陶瓷具有明显强化作用,添加1.5%纳米氮化硼时,复合材料的力学性能最佳,抗弯强度(TRS)提高了21.6%,硬度(HRA)提高了1.6%.纳米氮化硼的加入,阻碍了Ti(C,N)颗粒的溶解,金属陶瓷的断口形貌表现为穿晶断裂.
Ti（C, N）-based cermets reinforced by nano-BN particles were prepared by a microwave sintering technology under N2 gas atmosphere. Effect of different content of nano-BN on transverse rupture strength（TRS） and hardness of the cermet was studied. Microstructure of this material was analyzed by SEM with BSE. Result shows the addition of nano-BN particles has obvious strengthening effect on the property of this cermet. The ttransverse rupture strength and hardness of the cermet are improved to about 21.6% and 1.6%, respectively, when the content of nano-BN particles is 1.5% in weight. The addition of nano-BN particles baffles the dissolution of Ti（ C, N） . The micrograph on fracture surface of this cermet shows a cleavage fracture.
出处
《厦门理工学院学报》
2011年第4期32-35,共4页
Journal of Xiamen University of Technology
基金
福建省产学研重大项目(2010H6027)
福建省教育厅JK类科技项目(JK2009029)
