To obtain dense Al-based quasicrystalline (QC) coatings with high content of quasicrystal phase, the QCs were deposited by the high-velocity air fuel spray process with different feedstock powder sizes. The phase composition, microstructure, chemical composition, tribological, and mechanical properties of the coatings were analyzed using x-ray diffraction, scanning electron microscopy, energy-dispersive x-ray spectroscopy, a pin-on-disk wear tester, and a nanohardness tester. The results indicated that smaller particle sizes produced denser structures with lower coating porosities, while the coarser powder helped maintain the desired quasicrystalline phase. In addition, the coatings sprayed with coarser powders exhibited a lower sensitivity to the sliding velocity due to a stronger bonding strength between the splats and a lower oxidation degree. The coating first exhibited abrasive wear coupled with oxidative wear, which was then converted to delamination, abrasive wear, and intensified oxidative wear.

为了获得具有高含量准晶相的致密Al基准晶（QC）涂层，通过高速空气燃料喷涂工艺以不同的原料粉末尺寸沉积了QC。使用X射线衍射，扫描电子显微镜，能量色散X射线光谱，针盘磨损测试仪和纳米硬度测试仪分析了涂层的相组成，微观结构，化学组成，摩擦学和力学性能。 。结果表明，较小的粒径可产生具有较低涂层孔隙率的致密结构，而较粗的粉末有助于保持所需的准晶相。另外，喷涂的较粗粉末的涂层对滑动速度的敏感性较低，这是由于短片之间的结合强度较高且氧化度较低。