论文部分内容阅读
采用热压扩散法制备Ti-Al复合电极材料,并通过SEM、四探针法、EDS、电化学工作站等测试手段对样品的结构与性能进行表征。结果表明:热压扩散焊接在压力6MPa、焊接温度550℃、氩气中保温时间≥90min的条件下,可以实现Ti和Al的冶金结合,而且扩散反应层产物的变化过程是:TiAl→TiAl2→TiAl3;复合材料的电化学性能较纯Ti的有所提高,制备工艺条件对电化学性能的影响与对电阻率的影响一致;在同等条件下,复合材料的极化电位较纯钛下降37～54mV,其电流密度至少可提高59.29%,电阻率仅为纯钛的1/10。
The Ti-Al composite electrode material was prepared by hot-press diffusion method. The structure and properties of the samples were characterized by SEM, four-probe method, EDS and electrochemical workstation. The results show that the metallurgical bonding of Ti and Al can be achieved under the condition of pressure 6MPa, welding temperature 550 ℃, argon holding time ≥90min, and the process of diffusion reaction is TiAl → TiAl2 → TiAl3. The electrochemical properties of the composites are better than those of pure Ti. The influence of preparation conditions on the electrochemical properties is consistent with the resistivity. Under the same conditions, the polarization potential of the composites is 37 ~ 54mV, the current density can be increased by at least 59.29%, the resistivity of pure titanium is only 1/10.