硅酸盐学报2008，Vol.36Issue(4)：503-509,7.
纳米改性Ti(C,N)基金属陶瓷的力学性能及抗热震性能
MECHANICAL PROPERTIES AND THERMAL SHOCK RESISTANCE OF NANO MODIFIED Ti(C, N)-BASED CERMETS
摘要
Abstract
Ti(C, N)-based cermets were fabricated by vacuum sintering. The mechanical properties and thermal shock resistance ofnano-TiN modified Ti(C, N)-based cermets with various metallic binder phases were measured. Analysis of the mechanical propertiesshows that higher strength and fracture toughness but lower hardness are obtained with high metallic phase content. Nickel can offerhigher strength and toughness while cobalt can exhibit higher hardness when the total content of metallic phase is at the same value.The thermal shock experimental results show that the micro crack initiation of all of the three series of notched samples (40%TiC-10%TiN-15%WC-14%Mo-20%Ni-1%C, 50%TiC-10%TiN-15%WC-4%Mo-10%Ni-10%Co-1%C and 50%TiC-10%TiN-15%WC-4%Mo-20%Co-1%C, in mass, the same below) has an incubation period at low temperature. The incubation period becomes shorterand the propagation speed of the micro crack increases with the rise of thermal shock temperature. Cermets with 4%Mo-10%Ni-10%Co show better thermal shock resistance compared with the sample of 4%Mo-20%Co, and the sample of 14%Mo-20%Ni exhib-its the best thermal shock resistance. Scanning electron microscope observation shows that the micro cracks are caused by connectedmicro pores and they propagate along ceramic boundaries and metallic phases.关键词
金属陶瓷/抗热震性/缺口/金属相Key words
cermets/ thermal shock resistance/ notch/ metallic phase分类
矿业与冶金引用本文复制引用
章晓波,刘宁,李勇,于超,陈焱..纳米改性Ti(C,N)基金属陶瓷的力学性能及抗热震性能[J].硅酸盐学报,2008,36(4):503-509,7.基金项目
日本玻璃板基金(No.301-00287)资助项目. （No.301-00287）
