摘要
本文对ＳｉＣ颗粒及部分稳定ＺｒＯ２复合增强Ａｌ２Ｏ３基陶瓷材料在循环压载荷作用下的疲劳特性进行了研究．带有缺口的试样在循环压应力的作用下，缺口根部将产生一条垂直于压应力轴的疲劳裂纹．压应力在缺口根部产生的局部不可逆损伤在卸载过程中会形成较大的残余拉应力，这使得裂纹形核并逐渐长大．而随着裂纹的长大，闭合效应逐渐增加，最终导致裂纹扩展完全停止．试样缺口长度和疲劳试验参数对裂纹的扩展速度和最终长度有较大的影响．
The behavior under cyclic compressive load in a zircoula and silicon carbide Particle reinforcedalumina composite is studied. The application of cyclic load to notched specimen can leed to stable crackgrowth along the plane of the notch in a direction normal to the far-held compressive axis. The residualtensile stresses generated by irreversible damage ahead of the notch-tip during compression loading causethe craCk nucleation and growth in unloading process, at the same time, the craCk closure e￣ causesthe arsed of the crack growth. The rate and the length of fatigue craCk growth are strongly ￣ed bythe length of the notch and fatigue test parameters.
出处
《无机材料学报》
SCIE
EI
CAS
CSCD
北大核心
1994年第2期197-203,共7页
Journal of Inorganic Materials
关键词
复合材料
疲劳
陶瓷复合材料
ceramic composite,fatigue,cyclic compressive load,particle reinforcing,alumina
