Electronic States of Cathodes of Ti-based Alloys in Aqueous Corrosion
Electronic States of Cathodes of Ti-based Alloys in Aqueous Corrosion
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钛基合金在水腐蚀中阴极的电子态
DOI：
10.2320/jinstmet1952.54.12_1369
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发表时间：
1990
影响因子：
--
通讯作者：
H. Adachi
中科院分区：
文献类型：
--
作者：
M. Morishita;Masahiro Chikuda;Yoshio Ashida;M. Morinaga;N. Yukawa;H. Adachi
为了理解钛基合金的阴极反应，用DV−X;α团簇方法模拟了阴极的局域电子态。结果解释的基础上的电子理论。这里考虑的是局部电子单元。阳极是钛基体区域，阴极是含合金元素的区域。这可能是由于阴极中存在大量的导电电子，使阴极反应得到强烈的增强，这些电子顺利地向H+放电，在阴极中形成H_（20）。电子局域化的趋势可以通过费米能级上的电子空位数来评估。另一方面，释放电子到H+的趋势似乎与费米能级的高度有关。结果发现，含有Ir、Pt、Rh、Pd和Ni的阴极比含有其他元素的阴极具有更多的电子空位，并且显示出更高的费米能级，并且增强了阴极反应。而阴极费米能级上电子态的变化主要发生在Ti原子的电子组态上，合金元素的存在对Ti原子的电子组态产生了影响。
Electronic States of In order to understand cathodic reactions of Ti−based alloys， the localized electronic states of a cathode were simulated by the DV−X；αcluster method． The results were interpreted on the basis of an electron theory． Alocal electronic cell is considered here． The anode is the titanium−matrix region and the cathode is the alloying−element containing region． It is likely that the cathodic reaction is enhanced strongly when many conduction electrons localize in the cathode， and then thses electrons discharge to H＋smoothly and forming H20n the cathode． The tendency of electron localization can be evaluated by the number of electron vacan− cies on the Fermi leve1． On the other hand， the tendency of discharging electron to H＋appears to be associated with the height of Fermi leve1． It was found that the cathode containing Ir， Pt， Rh， Pd and Ni had more electron vacancies and ex− hibited a higher Fermi level than the cathode containing other elements， and enhanced a cathodic reaction． However， these changes of electronic states on the Fermi level of the cathode occurred mainly in electron configurations of Ti atoms which were affbcted by the presence of alloying elements．