Wear behaviour of high velocity suspension flame sprayed (HVSFS) Al2O3 coatings produced using micron- and nano-sized powder suspensions

Even though the as-deposited coatings are quite smooth (Ra ∼ 1.3-2 μm), polishing to Ra ∼ 0.1 μm further improves the wear resistance in all cases, as it delays the onset of tribofilm delamination phenomena.