采用PLD/HIPIMS方法沉积的Ag/W1-xTixB2.5与纯银涂层的力学性能对比
Comparison of mechanical properties of Ag/W1-xTixB2.5 and pure silver coatings deposited by PLD/HIPIMS method
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中文总结 AI 辅助
本研究通过PLD和HiPIMS制备Ag/WB2.5、Ag/W0.76Ti0.24B2.5及纯银涂层，对比发现Ag/W0.76Ti0.24B2.5涂层耐磨性、附着力和耐腐蚀性均表现优异，是性能优良的复合涂层。
中文摘要 AI 辅助
过渡金属硼化物因独特性能受到越来越多关注，其不仅具有极高硬度，还具备良好的化学稳定性和热稳定性；而银则是提升导电性、导热性、耐磨性的优良材料，且因生物特性具备抗菌性能。将这两种材料结合可制备兼具超硬度与增强功能特性的双层涂层。本研究决定合成Ag/WB2.5、Ag/W0.76Ti0.24B2.5涂层，并将其性能与单一组分进行对比：银涂层采用脉冲激光沉积（PLD）制备，而WB2.5和W0.76Ti0.24B2.5涂层采用高功率脉冲磁控溅射（HiPIMS）制备。为测定力学性能，开展了纳米压痕试验、划痕试验测定涂层附着力，以及往复运动磨损试验测定耐磨性。结果显示，所有情况下银膜均提升了材料的耐磨性，且未对材料硬度产生显著影响；此外，Ag/W0.76Ti0.24B2.5膜对基底表现出极佳附着力。还采用Tribotouch进行了人手擦拭模拟试验，经36000次循环后，Ag/W0.76Ti0.24B2.5涂层仅出现轻微变形，宏观不可见，其循环次数是纯银膜的三倍以上。同时在0.9%NaCl环境中开展了腐蚀试验，结果显示Ag/W0.76Ti0.24B2.5双层涂层具备与纯银相近的优异耐腐蚀性。
英文摘要
Transition metal borides are attracting increasing interest due to their unique properties. They are not only characterised by very high hardness, but also considerable chemical and thermal stability. Silver, on the other hand, is a good material for increasing electrical and thermal conductivity, wear resistance and has antibacterial properties due to its biological characteristics. Combining these two materials can provide superhard bilayers with increased functional properties. In this study, it was decided to synthesise Ag/WB2.5, Ag/W0.76Ti0.24B2.5 coatings and compare their properties to the individual components. The silver coating was produced by pulsed laser deposition (PLD), while the WB2.5 and W0.76Ti0.24B2.5 coatings were formed by high-power pulsed magnetron sputtering (HiPIMS). To determine the mechanical properties, nanoindentation tests, adhesion of the coatings by scratch -test and wear resistance by abrasion in reciprocating motion were tested. In all cases, the silver film contributed to an increase in the wear resistance of the materials without major changes in the hardness results of the materials. In addition, the Ag/W0.76Ti0.24B2.5 film showed very good adhesion to the substrate. Human hand wiping simulator was also carried out using - Tribotouch. After 36 000 cycles Ag/W0.76Ti0.24B2.5 coating was slightly deformed, which was not visible macroscopically. This result is more than three times greater than for the pure silver film. It was also decided to carry out corrosion tests in an environment of 0.9% NaCl. The Ag/W0.76Ti0.24B2.5 bilayer has very good corrosion resistance, similar to pure silver.
