Mechanical Behaviour and Corrosion Performance of Thin Film Magnesium WE Alloys
Mechanical Behaviour and Corrosion Performance of Thin Film Magnesium WE Alloys
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薄膜镁 WE 合金的机械行为和腐蚀性能
DOI：
10.4028/www.scientific.net/msf.690.286
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发表时间：
2011
期刊：
影响因子：
--
通讯作者：
E. Quandt
中科院分区：
文献类型：
--
作者：
K. Schlüter;Julia F. Reverey;N. Hort;C. Zamponi;E. Quandt
镁基薄膜由于与相同标称组成的块体合金相比改变腐蚀性能的潜力而越来越受到关注。本文通过拉伸试验和电化学腐蚀试验研究了成分为Mg_4Y_3Gd和Mg_4Y_3Nd的镁合金溅射薄膜的力学性能和腐蚀性能。拉伸测试表明，溅射参数对薄膜的力学性能有很大的影响。通过改变Ar溅射压力和DC溅射功率，可以制造具有广泛变化的机械行为的膜，从脆性到非常延展性的膜，其可以被应变到30%以上。机械性能和沉积条件之间的确定的依赖性被发现是存在于这两个调查合金。腐蚀试验表明，所研究的样品的腐蚀行为是不相关的薄膜的机械性能，作为腐蚀速率和局部腐蚀的趋势不改变显着的沉积条件下，显着影响的机械性能。
Mg based thin films are of increasing interest due to the potential in varying the corrosion properties in comparison to bulk alloys of the same nominal composition. In this work the mechanical behaviour and the corrosion performance of sputtered thin films consisting of magnesium alloys with the compositions Mg4Y3Gd and Mg4Y3Nd were investigated by tensile tests and electrochemical corrosion tests, respectively. The tensile tests showed that the sputtering parameters have an enormous influence on the mechanical properties of the thin films. By variation of the Ar sputtering pressure and the DC sputtering power it was possible to fabricate films with widely varying mechanical behaviour reaching from brittle to very ductile films which could be strained to more than 30%. The determined dependency between mechanical properties and deposition conditions was found to be present in both investigated alloys. The corrosion tests revealed that the corrosion behaviour of the investigated samples is not correlated to the mechanical properties of the thin films, as the rate of corrosion and the tendency to localized corrosion do not change significantly upon the deposition conditions, which dramatically influence the mechanical properties.