The phase field crystal method was employed to investigate the microcrack propagation and connection process at the interface of metal micro-interconnection structures at nanoscale.The results show that with the increase of temperature and evolutionary time,the length of the main crack and the number of secondary microcracks increases in the propagation process.The micro-cracks develop with a"line-shaped"and"dendritic"shape,and the connectivity behaviors gradually increase during the micro-crack propagation process.The length of the primary crack and the appearance time of the secondary microcrack during the propagation process of the microcrack with a circular initial notch shape are slower than those with a rectangular initial notch shape.The propagation length of microcrack increases gradually with the increase of evolutionary time and temperature.The propagation rate of the microcracks increases with the increase of the evolution temperature.However,with the prolongation of time,it shows a tendency to initially increase and then decline.The temperature does not change the atomic fluctuation period.The propagation of the microcracks at different temperatures only depends on the atomic diffusion rate,but not on the interatomic distance.
关键词
微裂纹/扩展连通/晶体相场方法/微观组织演化
Key words
microcrack/extended connectivity/phase field crystal method/microstructure evolution
维普
万方数据