Depressurization amorphization of single-crystal boron carbide.

@article{Yan2009DepressurizationAO,
  title={Depressurization amorphization of single-crystal boron carbide.},
  author={Xue Quan Yan and Zhijie Tang and Longxiang Zhang and Jihong Guo and Cheng-qiang Jin and Yiwen Zhang and Tsuneaki Goto and James W. McCauley and M. W. Chen},
  journal={Physical review letters},
  year={2009},
  volume={102 7},
  pages={075505}
}
We report depressurization amorphization of single-crystal boron carbide (B4C) investigated by in situ high-pressure Raman spectroscopy. It was found that localized amorphization of B4C takes place during unloading from high pressures, and nonhydrostatic stresses play a critical role in the high-pressure phase transition. First-principles molecular dynamics simulations reveal that the depressurization amorphization results from pressure-induced irreversible bending of C-B-C atomic chains cross… CONTINUE READING
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