Anomalous elastic response of silicon to uniaxial shock compression on nanosecond time scales.
نویسندگان
چکیده
We have used x-ray diffraction with subnanosecond temporal resolution to measure the lattice parameters of orthogonal planes in shock compressed single crystals of silicon (Si) and copper (Cu). Despite uniaxial compression along the (400) direction of Si reducing the lattice spacing by nearly 11%, no observable changes occur in planes with normals orthogonal to the shock propagation direction. In contrast, shocked Cu shows prompt hydrostaticlike compression. These results are consistent with simple estimates of plastic strain rates based on dislocation velocity data.
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عنوان ژورنال:
- Physical review letters
دوره 86 11 شماره
صفحات -
تاریخ انتشار 2001