What is identation method ?
Indentation is the most commonly applied means of testing the mechanical properties of materials specially the hardness tests applied to small volumes. In this paper indentation technique (HMV-G20ST; SHIMADZU, Tokyo, Japan) on the polished surface of the composite was applied using the indentation load of 19.6 N for 15 s. More than ten indentations were made on each sample to obtain reliable data. The indentation size and crack length were measured from SEM images.