Dislocation and Crack Formation in Indented Germanium Single Crystals
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概要
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Deformation of germanium crystals by indentation is studied over temperature range between 25° and 600℃. As Allen showed, superficial damage, ring- and radial-crack are observed. However, as temperature increases occurrence of ring-crack is suppressed in contrast to radial-crack. A {110}-type crack is frequently observed at elevated temperatures. Results obtained are discussed with elastic theory of Herz problem. Stress required to produce a crack is 40-50 kg/mm^2 and slightly increases as temperature increases. The temperature at which macroscopic slip lines become to be observable is higher in heavily doped crystals than in high purity crystals, indicating that multiplication of dislocation is strongly affected by impurities. These modes of deformation confirm the results of bending experiment obtained by Suzuki.
- 社団法人応用物理学会の論文
- 1963-06-15