Transparent, superhard amorphous carbon phase from compressing glassy carbon
Transparent, superhard amorphous carbon phase from compressing glassy carbon
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DOI：
10.1063/1.4861929
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发表时间：
2014-01
影响因子：
4
通讯作者：
M. Yao;Jun-ping Xiao;Xianhong Fan;Ran Liu;Bingbing Liu
中科院分区：
文献类型：
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作者：
M. Yao;Jun-ping Xiao;Xianhong Fan;Ran Liu;Bingbing Liu
拉曼光谱已被用于研究玻璃碳（GC）在高压下的转变。在33 GPa以上，气相色谱球转变为透明碳相。这种转变与碳从sp2杂化到sp3杂化的成键特性的变化和硬度的增加有关。在62 GPa围压下，GC球的屈服强度可达120 GPa，与金刚石在环境条件下的屈服强度相当。压力介质引起的应力对观察到的气相色谱在压力下的转变具有重要意义。
Raman spectroscopy has been used to study the transformations of glassy carbon (GC) under high pressure. A GC sphere has been observed to transform into a transparent carbon phase above 33 GPa. The transformation is associated with a change in bonding character of carbon from sp2 to sp3 hybridization and an increase in hardness. The yield strength of the GC sphere reaches a value of 120 GPa at a confining pressure of 62 GPa, which is comparable to that of diamond at ambient conditions. The stress induced by the pressure medium is important for the observed transformations of GC under pressure.