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This paper aims to study the effect of adding different SiC content on the wear performance of Al 2 O 3 -TiB 2 -SiC ternary composite coatings produced by the air plasma spraying process. The study used SHS powders as primary materials, consisting of H 3 BO 3 , Al, and TiO 2 , and 5, 10, and 15 Vol.% SiC. The microstructure and wear specifications of the coatings were characterised using FESEM, microhardness, and pin-on-disk methods. The results showed that the addition of SiC led to higher hardness and lower wear track width and rate compared to Al 2 O 3 -TiB 2  composite coatings. The best wear behaviour was observed in Al 2 O 3 -TiB 2 -10%SiC and 15 wt% SiC composite coatings. The main wear mechanisms were found to be brittle fracture, delamination and adhesive for all samples.

Plasma-sprayed Al 2 O 3 -TiB 2 -SiC ternary composite coatings and its wear behaviour based on SiC content