Erosive wear of transparent nanocomposite coatings

The effects of some key parameters, i.e. impingement angle, erodent type, nanosilica content, nanosilica type, on the erosion behaviors of the polyacrylate-based coatings were systematically investigated. All samples showed brittle erosion behavior under erosion wear. When using the sharp-edged erodent, the mass loss of coatings decreased with the filler content, whereas it was not sensitive to the filler content when subjected to round erodents. Based on worn surface analysis, it was found that the sharp-edged erodent tended to cause micro-cutting and immediate micro-cracking on the coatings, whereas the round erodent would like to make micro-deformation on the coatings, and accordingly induce the surface fatigue. Moreover, the effect of nanoparticle type on the erosion wear was examined and discussed.

► Polyacrylate-based coatings filled with nanosilica particles were prepared.
► Key parameters on the erosive resistance of the coatings were investigated.
► The angular erodent led to much greater mass loss of coatings than the round ones.
► The worn surfaces were analyzed and wear mechanisms were proposed.
► Type of nanoparticles on the erosive wear was discussed.