Copper-MAX-phase composite coatings obtained by electro-co-deposition: A promising material for electrical contacts
Copper-MAX-phase composite coatings obtained by electro-co-deposition: A promising material for electrical contacts
复制标题
DOI：
10.1016/j.surfcoat.2017.04.060
复制
发表时间：
2017-07
影响因子：
5.4
通讯作者：
R. Grieseler;M. Camargo;M. Hopfeld;U. Schmidt;A. Bund;P. Schaaf
中科院分区：
文献类型：
--
作者：
R. Grieseler;M. Camargo;M. Hopfeld;U. Schmidt;A. Bund;P. Schaaf
采用直流电沉积法制备了一种由铜和MAX相粒子（由Ti2AlC和Ti3AlC2组成的工业粉末）组成的新型复合涂层体系。在微观尺度上，MAX相颗粒被成功地结合（高达3 wt%）并均匀分布在铜涂层中。在厚度约为50 μm时，研究了涂层硬度、电接触电阻和晶体结构等性能的变化。进一步研究了复合材料在电弧作用下的性能。由于颗粒的掺入，复合镀层的硬度有所提高，结构略有变化，但接触电阻与在相同条件下沉积的纯铜膜相似。复合涂层在电弧作用下的性能得到了改善。电弧实验后，复合镀层形貌无明显变化，而纯铜镀层则出现了熔化和再结晶现象。因此，复合层是电气应用（如电气开关设备）的合适替代品。
A new and promising composite coating system comprising copper and MAX phase particles (commercial powder consisting of Ti2AlC and Ti3AlC2) was prepared electrochemically using direct current electrodeposition. The MAX phase particles, in micro-scale sizes, were successfully incorporated (up to 3 wt%) and well distributed in the copper coating. The change in the coating properties such as hardness, electrical contact resistance as well as crystallographic structure was investigated in layers having thickness values of about 50 μm. Furthermore, the behavior of the composite layers under electrical arcing conditions was studied. Beside an increase of the hardness and a slight change in the structure due to particle incorporation, it could be shown that the electrical contact resistance of the composite coatings is similar to the one of pure copper films deposited at the same conditions. An improved behavior under electrical arcing was found for the composite coatings. After the arcing experiments no significant changes of the morphology of the composite coatings were found, whereas, the pure copper layers showed melting and recrystallization. The composite layers are, therefore, a suitable alternative for electrical applications such as electrical switching devices.