Abstract
The sliding wear under fretting condition, scratch adhesion, deformation behavior during micro- and nanoscratch studies have been studied for nanocomposite TiSiBC hard coating deposited on steel substrate by magnetron sputtering. The nanocomposite coatings having hardness and modulus around 30 and 300 GPa, respectively, showed a very significant decrease in fretting wear as compared to the uncoated steel. Pileup occurred along the sides of the scratch track due to plastic deformation of the substrate at the scratch load; however, cracks were not seen in films. The coefficient of friction remained <0.25 with increasing load. Under static load, even at 2000 gf (20 N) coating did not show crack in the film. Coated steel showed significant elastic recovery as compared to uncoated steel. The TiSiBC-coated substrate showed higher resistance to scratch, higher wear resistance, higher toughness and low coefficient of friction.
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