The Oliver and Pharr method [29,30] was used with 25 indentations of 1 mN load separated by a 10 mm distance. A typical load–displacement curve with the complete cycle of loading and unloading is presented in Fig. 12
The Oliver and Pharr method [29,30] was used with 25 indentations of 1 mNload separated by a 10 mm distance. A typical load–displacementcurve with the complete cycle of loading and unloading is presentedin Fig. 12