Crack initiation behavior in single crystalline silicon
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- 作者：Lv Zhao ; Didier Bardel ; Anne Maynadier
- 关键词：Fracture ; Static energy release rate ; Fractography ; Crack velocity ; Silicon single crystal
- 刊名：Scripta Materialia
- 出版年：2017
- 出版时间：15 March 2017
- 年：2017
- 卷：130
- 期：Complete
- 页码：83-86
- 全文大小：1000 K
- 卷排序：130
文摘
In this article, we report special fracture initiation behavior of (110) cleavage in silicon single crystal. It is found that the static energy release rate always exceeds the material toughness upon crack initiation. According to high-speed imaging measurements and fractographies, it is found that the crack has an important initial velocity, i.e. up to 3000 m/s, and then reaches the steady-state propagation regime very quickly. The experimentally revealed initial crack velocity is in good agreement with estimation from the energy flux at crack initiation.