中国有色金属学报(英文版), 2017, 27(1): 102-109.
10.1016/S1003-6326(17)60011-6
研究稀土元素La对铜合金的电弧侵蚀行为和氧化行为的影响。结果表明：稀土元素La的加入有利于铜合金抗氧化性能和电弧侵蚀性能的改善，并有效地降低了接触电阻和温升。通过对CuLa合金的高温抗氧化性能机理分析表明，富集在晶界的La元素形成La2O3或者CuLa合金，起到了界面包裹的作用，从而抑制了铜的进一步氧化。通过热力学计算可知，CuLa合金中的La择优氧化形成La2O3，对铜基体起到了保护作用。动力学分析表明，CuLa合金的激活能较纯铜的高，说明其抗氧化性能更好。
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