保温时间对GPS氮化硅陶瓷晶界相及力学性能的影响  

Effects of Holding Time on Intergranular Phase and Mechanical Property of GPS Silicon Nitride Ceramics

作　　者：代建清[1] 黄勇[1] 谢志鹏[1] 马天[1] 杨金龙[1] 马景陶[1] 

机构地区：[1]清华大学材料科学与工程系

出　　处：《无机材料学报》2003年第1期91-97,共7页Journal of Inorganic Materials

基　　金："863"(863-715-06-0100);"973"(G2000067204);国家重点资助项目

摘　　要：研究了保温时间对气压烧结(GPS)氮化硅陶瓷晶界相及力学性能的影响.研究发现,由于晶界相中的氧含量随保温时间的延长先增加然后明显降低,导致烧结体中晶界相的总量和致密化程度随保温时间的增加有一最大值.在本文所研究的保温时间范围内,烧结体的室温强度随保温时间的增加而升高.The effect of holding time on intergranular phase and mechanical property of GPS silicon nitride ceramics was studied. Results show that the contents of intergranular oxygen and total grain, boundary phase as well as the density of sintered samples have maximum values with increasing the holding time. Among the range of holding time in this research (0similar to90min), however, the room temperature strength of GPS silicon nitride ceramics increases with expanding the holding time.

关 键 词：GPS 力学性能 氮化硅陶瓷 晶界相 气压烧结 保温时间 

分 类 号：TQ174.758[化学工程—陶瓷工业] TQ174.65[化学工程—硅酸盐工业]