ZTA陶瓷复合材料的高温蠕变及延迟断裂行为研究

Study on High Temperature Creep and Delay Fracture behaviors of ZTA Ceramic Composite

本文对一种ZTA材料的高温蠕变及延迟断裂行为进行了实验性研究。研究表明:1100℃以下ZTA材料没有明显的蠕变及裂纹缓慢生长(SCG);当温度升高到1200℃时,蠕变和SCG都变得显著起来。静态疲劳试验发现:在1200℃时材料的断裂可能存在两种机理,即SCG与蠕变断裂(或失效)。

A kind of ZTA material is used in studying high temperation creep and delay fracture behaviors. Experimental reswlts show that, below 1100℃ , material has no distinct creeping and sub-critical crack growth (SCO . While at 1200℃, the creep and SCG behavior become distinctly. Static fatigue test shows that, the delay fracture at 1200℃ probablely have two rndchanisrns, failure due to SCG and due to creep fracture separately.