王碧侠,马兴飞,李斗,刘欢,李建新.电流密度对Na2B4O7-CaCl2熔盐电解法制备TiB2/TiB渗层的影响[J].稀有金属材料与工程,2018,47(7):2120~2125.[WANG Bixia,MA Xingfei,Li Dou,Liu Huan,Li Jianxin.EFFECTS OF CURRENT DENSITY ON TiB2/TiB LAYER BY MOLTEN SALTELECTROLYSIS IN Na2B4O7-CaCl2 MELT[J].Rare Metal Materials and Engineering,2018,47(7):2120~2125.]
电流密度对Na2B4O7-CaCl2熔盐电解法制备TiB2/TiB渗层的影响
投稿时间:2016-12-21  修订日期:2017-04-10
中文关键词:  熔盐电解  渗层  TiB2  循环伏安法
基金项目:国家自然科学基金资助(51404186):陕西省教育厅科研计划项目(13JS060)
中文摘要:
      采用熔盐电解法在纯钛表面渗硼,以硼砂作硼源,无水氯化钙为支持电解质,在电解温度930℃,电解时间1h的条件下,研究不同电流密度对渗层物相、微观结构及渗层厚度的影响,并用循环伏安法对阴极反应机理进行了研究。利用XRD对渗硼试样表面进行物相分析,利用扫描电镜(SEM)观察渗硼试样的断面形貌并采用能谱(EDS)进行元素分析,结果表明:在不同的电流密度下电解渗硼,得到的渗层均由TiB2和TiB组成,且TiB2渗层厚度为1.2~4.5μm,渗层厚度随电流密度非线性变化。循环伏安法结果显示阴极的反应主要是钠离子的还原,钠离子再将B2O3中的B置换出来,高温下B原子向钛基体扩散而形成硼化物渗层。
EFFECTS OF CURRENT DENSITY ON TiB2/TiB LAYER BY MOLTEN SALTELECTROLYSIS IN Na2B4O7-CaCl2 MELT
英文关键词:molten salt electrolysis  boriding, TiB2  cyclic voltammetry
英文摘要:
      The method of molten salt electrolysis was applied for boronizing of Titanium. The experiment was carried out at 930 ℃ for1h, using Borax as the source of boron and Calcium Chloride as supporting electrolyte. The effects of current density on the microstructure and the thickness of the TiB2/TiB layer were investigated and the electrochemical behavior of cathode in molten salt was studied by Cyclic Voltammetry. XRD, SEM and EDS means were applied to analyze phase composition, microstructure and morphology, element content of the borides layer respectively. The results show that the bording layer was composed of TiB2 and TiB, with the thickness of the TiB2 layer being 1.2 to 4.5μm depending on the current density; the thickness of the TiB2 layer changes nonlinearly with the increase of the current density;Analysis of the Cyclic Voltammetry curve shows that the cathodic reaction was mainly the reduction of sodium ions to sodium, then boron was reduced by sodium from B2O3; the borides layer was formed by the diffusion of B atoms into titanium substrate at high temperature.
作者单位E-mail
王碧侠 西安建筑科技大学 陕西省冶金工程技术研究中心 yj-wangbixia@xauat.edu.cn 
马兴飞 西安建筑科技大学 陕西省冶金工程技术研究中心  
李斗 西安建筑科技大学 陕西省冶金工程技术研究中心  
刘欢 西安建筑科技大学 陕西省冶金工程技术研究中心  
李建新 西安建筑科技大学 陕西省冶金工程技术研究中心  
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