Temperature dependence of the microhardness and dislocation mobility in the near-surface layer of C60 crystals

被引：8
|
作者：
Manika, I
Maniks, J
Kalnacs, J
机构：
[1] Latvian State Univ, Inst Solid State Phys, LV-1063 Riga, Latvia
[2] Latvian Acad Sci, Inst Phys Energet, LV-1006 Riga, Latvia
来源：
FULLERENE SCIENCE AND TECHNOLOGY | 1999年 / 7卷 / 05期
关键词：
D O I：
10.1080/10641229909351381
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Temperature dependence of the Vickers microhardness and dislocation mobility of as grown and aged in air C-60 Single crystals in the range of 300-550K has been investigated. An anomalous change of the hardness in the near-surface layer of C-60 crystals around 470K is observed which is explained by the phase transition from an oxygen-intercalated to an oxidised structure. The growth of the oxide film on heating the crystals in air at temperatures higher than 470K is detected, and hardness of 280 MPa of the oxide film is measured. The stress-promoted oxidation of fullerite in the local zones of indentation at 390-470K is discovered. It has been found that ageing of the crystals in air reduce the temperature of the stress-promoted oxidation.
引用
收藏
页码：825 / 839
页数：15
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