Wear mechanisms in electroless nickel coatings

摘要: Abstract Electroless nickel coatings are susceptible to severe adhesive wear against plain carbon steel under dry sliding contact, because the low interfacial and high surface free energies of this material combination produce highly compatible surfaces. Controlled heat treatment eliminates by inducing crystallization amorphous Ni 3 P, which is incompatible with steel. Electroplating counterface chromium also owing efficient barrier properties its oxide but a stainless exacerbates problem single-phase microstructure durability film. The reciprocating diamond scratch test gives different ranking order rate from Falex, pin-on-flat Taber tests, dependence on fracture toughness as dominant parameter rather than transfer. Wear mechanisms observed in investigation include transfer, oxidation, three-body abrasion, micromachining, plastic deformation delamination. In general, no correlation found between hardness; primarily changes mechanism effected processing, materials or conditions.