Elastic properties of carbon phases obtained from C60 under pressure: the first example of anisotropic disordered carbon solid
Elastic properties of carbon phases obtained from C60 under pressure: the first example of anisotropic disordered carbon solid
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DOI：
10.1088/0953-8984/14/44/400
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发表时间：
2002-10
期刊：
影响因子：
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通讯作者：
V. Brazhkin;A. G. Glazov;V. V. Mukhamadiarov-V.;E. Gromnitskaya;A. Lyapin;S. Popova;O. V. S. gorova
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文献类型：
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作者：
V. Brazhkin;A. G. Glazov;V. V. Mukhamadiarov-V.;E. Gromnitskaya;A. Lyapin;S. Popova;O. V. S. gorova
我们观察到从 C60 富勒体获得的无序石墨样品在 7.5 GPa 压力下加热到不同温度时，纵向和横向超声波的传播速度以及硬度的各向异性。弹性和硬度的各向异性与准静水实验条件下发生的附加压力分量有关。测定样品的弹性特性。我们提出了一种模型描述，将观察到的超硬 sp2 碳的特性与其可能的结构特征及其形成机制联系起来。
We observe an anisotropy of the propagation velocities of longitudinal and transverse ultrasonic waves, as well as of the hardness, for disordered graphite-like samples obtained from the C60 fullerite, which is heated to different temperatures under a pressure of 7.5 GPa. The anisotropy of the elastic properties and the hardness is connected to the additional pressure component that occurs in the quasi-hydrostatic experimental conditions. The elastic characteristics of the samples are determined. We propose a model description relating the observed properties of superhard sp2 carbon to its possible structural features and to the mechanism of its formation.