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首页> 外文期刊>Philosophical Magazine Letters >Phase transformation of germanium by processing through high-pressure torsion: strain and temperature effects
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Phase transformation of germanium by processing through high-pressure torsion: strain and temperature effects

机译：通过高压扭转处理通过加工锗的相变：应变和温度效应

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摘要

Germanium has been processed by high-pressure torsion (HPT) under a nominal pressure of 24 GPa at room temperature and cryogenic temperature. The samples processed at room temperature were composed of a diamond-cubic Ge-I phase and a metastable tetragonal Ge-III phase. The formation of Ge-III was significantly suppressed and Ge-I and an amorphous phase, in addition to a small amount of body-centred-cubic Ge-IV, appeared in the case of cryogenic HPT processing at 100K. The Ge-IV phase gradually disappeared at room temperature. These results indicated that shear strain and thermal energy are important for promoting the formation of Ge-III.
机译：锗在室温和低温下，在24 GPa的标称压力下，通过高压扭转（HPT）进行加工。在室温下处理的样品由金刚石立方Ge-I相和亚稳四方Ge-III相组成。在100K低温HPT处理的情况下，Ge III的形成被显著抑制，除了少量的体心立方Ge IV外，Ge-I和非晶相也出现。室温下，Ge IV相逐渐消失。这些结果表明，剪切应变和热能对于促进Ge-III的形成非常重要。

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