Preparation of wettable TiB2-TiB/Ti cathode by electrolytic boronizing for aluminum electrolytic  被引量:3

通过铝电解的电解渗硼制备可湿性的TiB2-TiB/Ti阴极(英文)

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作  者:HUANG You-guo WANG Yi ZHANG Xiao-hui WANG Hong-qiang LI Qing-yu 黄有国;王益;张晓辉;王红强;李庆余(Guangxi Key Laboratory of Low Carbon Energy Materials,School of Chemistry and Pharmaceutical Sciences,Guangxi Normal University,Guilin 541004,China;Guangxi Key Laboratory of Comprehensive Utilization of Calcium Carbonate Resources,College of Materials and Environmental Engineering,Hezhou University,Hezhou 542899,China)

机构地区:[1]Guangxi Key Laboratory of Low Carbon Energy Materials,School of Chemistry and Pharmaceutical Sciences,Guangxi Normal University,Guilin 541004,China [2]Guangxi Key Laboratory of Comprehensive Utilization of Calcium Carbonate Resources,College of Materials and Environmental Engineering,Hezhou University,Hezhou 542899,China

出  处:《Journal of Central South University》2019年第10期2681-2687,共7页中南大学学报(英文版)

基  金:Project(21473042) supported by the National Natural Science Foundation of China;Project(GUIKE-AD18126001) supported by the Guangxi Science and Technology Special Project on Bases and Talents,China

摘  要:According to the problems of short life and low strength of TiB2 coating cathode for current technology in aluminium electrolysis industry,this work synthesized TiB2-TiB/Ti gradient composite with TiB2 coating and TiB whiskers in metallic Ti matrix by a electrolytic boronizing method based on similar density and thermal expansivity of the three materials.The phase composition and morphology of the cross-section were determined by X-ray diffraction(XRD),scanning electronic microscope(SEM)and X-ray energy dispersive spectrum(EDS).The results show that uniform TiB2 layer with a thickness of 8-10μm is continuously coated on the surface while the TiB whisker connected with TiB2 layer was embedded dispersedly into the matrix.The TiB crystal whisker has a maximum length of about 220μm.The growth rate of TiB2 and TiB is enhanced by the strong reduction of B4C.The novel gradient design of the composite helps to extend life and improve strength of the TiB2 cathode in aluminium electrolysis.针对铝电解工业现有技术中TiB2涂层阴极寿命短、强度低的问题,采用密度和热膨胀率相近的三种材料的电解渗硼方法,合成了TiB2涂层和TiB晶须在金属Ti基体中的TiB2-TiB/Ti梯度复合材料。采用X射线衍射(XRD)、扫描电子显微镜(SEM)和X射线能谱(EDS)等分析手段测定了材料的相组成和截面形貌。结果表明,表面连续涂覆厚度为8~10μm的均匀TiB2层,而与TiB2层连接的TiB晶须分散嵌入基体中。TiB晶须的最大长度约为220μm,通过B4C的强烈还原,TiB2和TiB的生长速率得到提高,这种复合材料的新型梯度设计有助于延长TiB2阴极在铝电解中的寿命和提高其强度。

关 键 词:aluminium electrolysis electrolytic boronizing titanium diboride gradient materials 

分 类 号:TB3[一般工业技术—材料科学与工程]

 

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