摘要
通过透射电子显微镜(TEM)和扫描电子显微镜(SEM)观察,硬度测试和电化学测试等方法研究了一种新型锂离子电池外壳材料含铈(Ce)Al-Cu-Mn合金的组织和性能.试验结果表明:合金中主要含有α-Al相,Al2Cu和Al12(Mn,Fe)3Si相.铸态合金中含有大量的Al-Mn-Fe-Si或者AlCu-Mn-Fe-Si和Al-Cu-Si-Ce中间相;Tafel极化曲线测试结果表明,腐蚀处的形貌主要由腐蚀环和腐蚀产物组成.随着Cl-浓度的增加,合金的耐蚀性能下降.交流阻抗谱分析表明,随着浸入溶液时间的增加,从高中频容抗弧和韦伯阻抗组成的曲线转变成单一的容抗弧,合金转变为全面腐蚀.
A Ce-containing Al-Cu-Mn alloy was investigated through hardness test, transmissionelectron microscopy, scanning electron microscopy and electrochemical measurement. Experimentalre sults indicate that main phases distributed in the alloy are CrAl,Al2Cu and Al12 （Mn,F e）3Siphases. The as-cast alloy also consisted of coarse Al-Mn-Fe-Si or Al-Cu-Mn-Fe-Si and Al-Cu-Si-Ceintermetallic phases. Polarization test results indicate that, the corrosion resistance of the alloydecreased with increase of Cl- concentration. The electrochemical impedance spectroscopy resultsshow that, with increase of immersion the time in 0. 6M NaCl solution, the curve with a capacitiveloop at high frequency and a warburg impedance transfer to that with a single capacitive loop, whichindicates that the alloy changed to general corrosion.
出处
《有色金属材料与工程》
CAS
2016年第3期78-83,共6页
Nonferrous Metal Materials and Engineering
基金
上海市优秀技术带头人项目(NO.15XD1524600)
关键词
铝合金
析出相
退火
显微组织
电化学性能
aluminium alloy
precipitates
annealing
microstmcture
ehcivochemkal property
