High-resolution TEM microscopy study of the creep behaviour of carbon-based cathode materials
High-resolution TEM microscopy study of the creep behaviour of carbon-based cathode materials
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DOI：
10.1016/j.msea.2017.01.061
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发表时间：
2017-02
期刊：
影响因子：
6.4
通讯作者：
Wei Wang-;Weijie Chen;W. Gu
中科院分区：
文献类型：
--
作者：
Wei Wang-;Weijie Chen;W. Gu
蠕变与铝电解槽阴极材料的劣化和变形密切相关。本研究的目的是获得铝电解用炭阴极的蠕变机理。用改进的Rapoport装置测量了CR=2.5、温度为945 ℃的半石墨阴极在铝电解过程中的蠕变应变。利用XRD和高分辨透射电镜（HRTEM）研究了铝电解过程中六方石墨转变为菱方石墨后碳原子的排列。碳阴极的蠕变变形与移动的位错壁有密切的关系。这些结果将有助于铝电解槽阴极质量和性能的控制。
Creep is in close relationship with the materials deterioration and deformation of the cathodes in aluminum reduction cells. The purpose of this work is to obtain the creep mechanism of the carbon cathode for aluminum electrolysis. A modified Rapoport equipment was used for measuring the creep strain of the semi-graphitic cathodes during aluminum electrolysis with CR=2.5 and at temperature of 945 ℃. The arrangement of carbon atom has been studied after hexagonal graphite converting into rhombohedral graphite during aluminum electrolysis by XRD and high-resolution transmission electron microscopy (HRTEM). The creep deformation of the carbon cathode has a close relationship with the mobile dislocation walls. These results will be helpful in controlling the cathode quality and its performance in aluminum reduction cells.