Racz Adel Sarolta, Kun Peter, Kerner Zsolt, Fogarassy Zsolt, Menyhard Miklos
Institute for Technical Physics and Materials Science, Centre for Energy Research, Konkoly Thege M. út 29-33, H-1121 Budapest, Hungary.
Centre for Energy Research, Konkoly Thege M. út 29-33, H-1121 Budapest, Hungary.
ACS Appl Nano Mater. 2023 Feb 22;6(5):3816-3824. doi: 10.1021/acsanm.2c05505. eCollection 2023 Mar 10.
A novel nanolayer is formed by means of ion irradiation applicable as protective coating. Tungsten carbide (WC)-rich nanolayers were produced at room temperature by applying ion beam mixing of various carbon/tungsten (C/W) multilayer structures using argon and xenon ions with energy in the range of 40-120 keV and fluences between 0.25 and 3 × 10 ions/cm. The hardness of the nanolayers was estimated by means of standard scratch test applying an atomic force microscope equipped with a diamond-coated tip (radius < 10 nm); the applied load was 2 μN. The irradiation-induced hardness of the nanolayers correlated with the areal density of the WC; with the increasing amount of WC, the hardness of the nanolayer increased. The produced layers had an order of magnitude better corrosion resistance than a commercially available WC cermet circular saw. If the WC amount was high enough, the hardness of the layer became higher than that of the investigated WC cermet. These findings allow us to tune and design the mechanical and chemical properties of the WC protective coatings.
通过离子辐照形成了一种新型纳米层，可作为保护涂层。通过使用能量在40 - 120 keV范围内、通量在0.25至3×10离子/cm之间的氩离子和氙离子对各种碳/钨（C/W）多层结构进行离子束混合，在室温下制备了富含碳化钨（WC）的纳米层。通过使用配备有金刚石涂层尖端（半径<10 nm）的原子力显微镜进行标准划痕试验来估计纳米层的硬度；施加的载荷为2 μN。纳米层的辐照诱导硬度与WC的面密度相关；随着WC含量的增加，纳米层的硬度增加。所制备的涂层的耐腐蚀性比市售的WC金属陶瓷圆锯高一个数量级。如果WC含量足够高，涂层的硬度会高于所研究的WC金属陶瓷的硬度。这些发现使我们能够调整和设计WC保护涂层的机械和化学性能。
