最近,我们用SEM观察到了一种未曾见报导过的断裂现象,解理台阶沿空洞排形成,当两排空洞汇合到一起时,河流花样也由支流汇集成干流(图1箭头A)。空洞排在断裂中所起的作用不但为研究金属材料的人,也为陶瓷研究者以及地震力学家所探索。图1中的断裂现象是在Si-Al-K掺杂钨丝中看到的,所以称这种空洞排为泡排。为了研究单个泡对台阶形成的影响,我们从总压下量为40％的钨棒上获得了泡无规分布的断口(图 2)。在解理裂纹扩展方向上,有些泡 Recently, we observed an unrecognized fracture phenomenon with SEM. The cleavage steps were formed along the rows of voids. When two rows of voids merged together, the river pattern also merged into a mainstream by the tributaries (arrow A in Figure 1). The role of voids in fracturing is not only for those who study metallic materials, but also for ceramic researchers and seismologists. The fracture phenomenon in Fig. 1 is seen in the Si-Al-K doped tungsten wire, so this type of voids is called a bank. In order to investigate the effect of a single bubble on the formation of steps, we obtained a randomly distributed bubble fracture (Figure 2) from a tungsten rod with a total reduction of 40%. In the cleavage crack propagation direction, some bubbles