基于V_6C_5的碳化钒中空位排序

Science reports of the Research Institutes, Tohoku University. Ser. A, Physics, chemistry and metallurgy Pub Date : 1973-06-01 DOI:10.1080/14786437308226888

K. Hiraga

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引用次数: 34

摘要

摘要:用选择区电子衍射和高压电子显微镜分析了钒碳化物中V6C5附近碳空位的有序排列。在V6C5和V8C7之间的非化学计量成分中发现了一种新的有序碳空位分布。该结构可以表示为基于Billingham确定的V6C5结构的由对构畴组成的长周期结构。贝尔和刘易斯(1972)。用电子显微镜直接观察到间隔为最近邻原子间距离11倍的周期畴边界。

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Vacancy Ordering in Vanadium Carbides Based on V_6C_5

Abstract The ordered arrangement of carbon vacancies in vanadium carbides near V6C5 has been analysed by means of selected-area electron diffraction and high-voltage electron microscopy. A new type of ordered distribution of carbon vacancies is found at non-stoichiometric compositions between V6C5 and V8C7. This structure can be expressed as a longperiod structure consisting of the enantiomorphic domains based on the structure V6C5 which was determined by Billingham. Bell and Lewis (1972). The periodic domain boundaries with spacing eleven times the nearest-neighbour interatomic distance are directly observed by electron microscopy.

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Science reports of the Research Institutes, Tohoku University. Ser. A, Physics, chemistry and metallurgy

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