关于脆性陶瓷材料R-曲线行为表达式的讨论  

Discussion on the Expressions of R-curve Behavior of Ceramic Materials

作　　者：宋世学[1] 邱学农[2] 

机构地区：[1]济南大学理学院,山东济南250022 [2]济南大学材料科学与工程学院,山东济南250022

出　　处：《济南大学学报（自然科学版）》2007年第3期197-199,共3页Journal of University of Jinan(Science and Technology)

基　　金：济南大学博士基金(B0305)

摘　　要：对目前常用的两种R-曲线表达式进行了详细的分析,讨论了它们的适应范围。根据R-曲线的指数形式,得出了增韧效果与基体的初始韧性值有关,并与增韧区的长度与裂纹的长度之比成正比的结论。Several expressions for R - curve of ceramics are discussed. According to the commonly used exponent expression for R - curve,it is concluded that the toughening effect is related to the lengths of toughening domain and crack and the toughness of the matrix. Study indicates that the toughening effect is proportional to the length of toughening domain and inversely proportional to the length of crack inside ceramics.

关 键 词：裂纹失稳扩展 R-曲线行为 断裂韧性 

分 类 号：TQ147[化学工程]