Direct experimental measurement of the speed-stress relation for dislocations in a plasma crystal |
| |
Authors: | Nosenko V Morfill G E Rosakis P |
| |
Institution: | Max-Planck-Institut für extraterrestrische Physik, D-85741 Garching, Germany. nosenko@mpe.mpg.de |
| |
Abstract: | The speed-stress relation for gliding edge dislocations was experimentally measured for the first time. The experimental system used, a two-dimensional plasma crystal, allowed observation of individual dislocations at the "atomistic" level and in real time. At low applied stress dislocations moved subsonically, at higher stress their speed abruptly increased to 1.9 times the speed of shear waves, then slowly grew with stress. There is evidence that immediately after nucleation dislocations can move faster than pressure waves. |
| |
Keywords: | |
本文献已被 PubMed 等数据库收录! |
|