Study on mechanism of environmental effect on interfacial fracture in micro-scale components

通过实验分析，阐明了气体环境对微尺度构件界面自由边抗裂纹萌生强度的影响。利用聚焦离子束技术制备了含有界面的微器件。带有精密加载装置的样品夹持器在配备环境电池的高压电子显微镜中操作。首次在气相环境中成功地进行了界面断裂过程的现场观测和断裂临界载荷的测量。然而，还需要进一步开展系统的研究，以阐明环境影响的机制。

Experimental analyses were performed to elucidate the effect of gaseous environment on the strength against crack initiation from interface free-edges in micro-scale components. The micro-components containing interfaces were fabricated with a focused ion beam technique. A specimen holder with a precise loading apparatus was operated in a high-voltage transmission electron microscope equipped with an environmental cell. The in-situ observation of interfacial fracture process, as well as the measurement of critical load at fracture, was successfully conducted for the first time in a gaseous environment. However, a systematic study needs to be further implemented to clarify the mechanism of environmental effect.