SiC颗粒弥散强韧化Si_3N_4陶瓷刀具材料  

Study of SiC Particle Reinforced and Toughened Silicon Nitride Base Ceramic Cutting Tool Material

作　　者：贾翃 何京彦[1] 夏志华[1] 

机构地区：[1]北京有色金属研究总院

出　　处：《稀有金属材料与工程》1999年第3期182-185,共4页Rare Metal Materials and Engineering

摘　　要：对ＳｉＣ颗粒弥散强韧化氮化硅陶瓷刀具材料的组成、结构及性能进行了研究．结果表明，ＳｉＣ颗粒的加入使材料的强度、韧性及硬度均比纯Ｓｉ３Ｎ４陶瓷有显著提高．通过对其显微结构的分析，发现ＳｉＣ颗粒的加入使材料的显微结构明显改善，能有效地阻止βＳｉ３Ｎ４晶粒的异常生长，有利于形成均匀细小的组织结构．同时，对ＳｉＣ颗粒在Ｓｉ３Ｎ４基体中的增韧机理进行了探讨．The microstructure and properties of a SiC particle reinforced and toughened silicon nitride base matrix ceramic cutting tool material have been investigated.The results show that this material has excellent mechanical properties.By adding the SiC particles,strength,toughness and hardness can be greatly improved,as compared with those of the pure silicon nitride ceramic.Microstructural analysis shows that the SiC particles prevents the grain growth of Si\-3N\-4,and also improves the microstructure of Si\-3N\-4 base ceramic.The toughening mechanism of SiC in the Si\-3N\-4 matrix is also discussed.

关 键 词：氮化硅 碳化硅 颗粒弥散强韧化 刀具 

分 类 号：TG711.01[金属学及工艺—刀具与模具]