Development of electroless NiP–PTFE–SiC composite coating

Electroless nickel (EN) and EN composite coatings with polytetrafluoroethylene (PTFE) and/or SiC were deposited by chemical deposition. The microstructure analysis was conducted with scanning electron microscopy and X-ray diffraction. Differential scanning calorimetry was used to study the phase transition of the coating during the heat treatment. The mechanical and tribological properties were measured using hardness indentation, scratch test and pin-on-disc wear test. The surface energy was analysed using water droplet surface contact angle measurement. The synergistic effects of SiC and PTFE on the wear and anti-sticking properties of the coatings are discussed.