期刊
PHYSICAL REVIEW LETTERS
卷 86, 期 11, 页码 2349-2352出版社
AMERICAN PHYSICAL SOC
DOI: 10.1103/PhysRevLett.86.2349
关键词
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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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