Nanoscale ripples on the compressive fracture surface of a bulk metallic glass with microscale crystals

作者：Liang W Z^*; Mao X Y; Wu L Z; Yu H J; Zhang L

来源：Journal of Materials Science, 2009, 44(8): 2016-2020.

DOI：10.1007/s10853-009-3244-y

Some periodic and straight strips with about 60 nm spacing were observed on the compressive fracture surface of Ni(42)Cu(5)Ti(20)Zr(21.5)Al(8)Si(3.5) bulk metallic glass (BMG) rods containing minor microscale crystals. The characteristic difference between amorphous matrix and microscale crystals also reveal why periodic corrugations could not be observed on the fracture surface of metal crystals. The dynamic crack instability may be explained by the interaction of the propagating crack and the internal micro-cracks. This kind of periodic morphologies showed in-plane feature, which may be attributed to the non-intense interaction between dynamic crack and micro-crack.

• 出版日期2009-4
• 单位哈尔滨工业大学; 黑龙江科技大学