稀土增韧金属陶瓷的工艺优化  

Process Optimization of Rare Earth Oxide Toughened Cermet Tool Materials

作　　者：徐立强[1] 黄传真[2] 侯志刚[1] 刘含莲[1] 

机构地区：[1]烟台大学机电汽车工程学院,山东烟台264005 [2]山东大学机械工程学院先进射流工程技术研究中心,山东济南250061

出　　处：《稀土》2008年第3期44-47,共4页Chinese Rare Earths

基　　金：国家自然科学基金项目资助(50505024);烟台大学青年基金(WL06Z14)

摘　　要：研究了烧结温度对稀土增韧Ti(C,N)基金属陶瓷刀具材料力学性能和显微结构的影响。结果表明,烧结温度对Ti(C,N)基金属陶瓷的力学性能影响很大,材料在1350℃和1400℃不致密,力学性能较差;材料在1450℃和1500℃比较致密,力学性能大幅提高。随温度升高,粘结金属容易析出,会对断裂韧性带来影响。材料的断裂方式以沿晶断裂为主。Effect of sinter/ng temperature on mechanical properties and microstructure of rare earth oxide toughened Ti（C, N） ceramic cutting tool materials is investigated. It shows that the mechanical properties of Ti（C, N） based ceramics are greatly influenced by sintering temperature. As a result, both of the density and mechanical properties of the materials sintered at 1350℃ and 1400℃ are worse than those sintered at 1450℃ and 1500℃ .Low sintering temperature results in low density and bad mechanical properties, but too high sintering temperature results in the precipitation of bond metal and thus reduces its fracture toughness. Intergranular fracture mode of the material is mainly observed.

关 键 词：烧结温度 稀土氧化物 Ti(C0.7N0.3)基金属陶瓷 显微结构 力学性能 

分 类 号：TQ174.758.22[化学工程—陶瓷工业]