First principal stresses were simulated for scratch test geometry in the load range of 7.5 15 N.
The micro-friction response of each composite component has been measured by instrumenting AFM for scratch test technique.
The heat treatment subsequent to the alkaline processing increased the film elastic modulus from 1.7 GPa to 2.8 GPa, the hardness from 12 MPa to 20 MPa and the critical load for scratch test from 1.5 mN to 5.5 mN.
This paper considers the effect of intrinsic parameters such as scratching speed, loading rate and diamond indenter radius on the measured critical load for scratch tests performed on various different coating substrate combinations (TiN, W, DLC, Al and Au).
When abrasion indentation depths were greater than ∼20% of the coating thickness, a rapid degradation in wear resistance arose and the same effect was seen for scratch test indentation depths.
For scratch tests, cells were plated in 12-well plates such that they were 90-100% confluent at the time the scratch was performed.
Nitric acid-treated glass cover slips were used to culture PMC42-LA cells in six-well plates (Nunc, Roskilde, Denmark) for scratch tests.
Figure 1 A Schematic diagram of scratch testing.
Fig. 3 Scratches observed by SPM and the residual traversal profiles of scratch tests.
11671_2011_384_MOESM1_ESM.JPEG Additional file 1: The parameters of scratch test.
