Pressure-Induced Amorphization in Silicon Caused by the Impact of Electrosprayed Nanodroplets
Pressure-Induced Amorphization in Silicon Caused by the Impact of Electrosprayed Nanodroplets
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DOI：
10.1103/physrevlett.105.145701
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发表时间：
2010-09-28
影响因子：
8.6
通讯作者：
Zheng, Jian-Guo
中科院分区：
文献类型：
--
作者：
Gamero-Castano, Manuel;Torrents, Anna;Zheng, Jian-Guo
这封信描述了冲击诱导的非晶化的单晶硅轰击纳米液滴。在每秒几公里的撞击速度下，射弹会触发持续数十皮秒的强烈压缩脉冲。通过透射电子显微镜和电子背散射衍射证实，相变发生在弹丸的滞止压力约为15 GPa时。我们推测，非晶化的结果从β-Sn相的减压或在压缩的金刚石相。
This Letter describes the shock-induced amorphization of single-crystal Si bombarded by nanodroplets. At impact velocities of several kilometers per second, the projectiles trigger strong compression pulses lasting tens of picoseconds. The phase transition, confirmed via transmission electron microscopy and electron backscatter diffraction, takes place when the projectile's stagnation pressure is approximately 15 GPa. We speculate that the amorphization results either from the decompression of the beta-Sn phase or during the compression of the diamond phase.