A new experimental approach of TiC/a-C coatings critical relative indentation
depth determination is presented. The data comparison of similar coatings obtained by
magnetron sputtering on WC-based and stainless steel substrates shows that TiC/a-C
nanohardness is affected by the substrate at indentation depths larger than 10-13 % of the
coating.s thickness. As for the friction coefficient, the soft substrate influences TiC/a-C
coatings at the depths as small as 1 % of the coatings. thickness so this mechanical property is
always influenced by the substrate.
Keywords: TiC/a-C coatings; mechanical properties.
full paper (pdf, 1232 Kb)