Spherical instrumented indentation of porous nanocrystalline zirconia

Modeling of elastic modulus and hardness determination by indentation of porous yttria stabilized zirconia coatings

“…The same tendency is observed for the hardness where a constant value of 10 GPa is found at the surface and a variation between 8 and 3 GPa on a cross-section. At the contrary on porous nanostructured YSZ coatings, Chintapalli et al [59] found a similar value of 200 GPa for the elastic modulus when the porosity fraction tends to 0% thus corresponding to a massive material whereas its value decreases until 80 GPa only at 20% of porosity. Moreover it is noticeable that for APS YSZ coatings the elastic modulus can be very low, a value of 2.5 GPa has been found as a result of the elastic modulus measured by four-point bending tests by Schwingel et al [60].…”

Mechanical properties of Al2O3 inverse opals by means of nanoindentation

“…The elastic properties depend on the total porosity, resulting in a reduction of this mechanical parameter when the porosity increases [27,28]. Luo and Stevens [29] reported an empirical equation which relates the elastic modulus to the porosity shape, as follows:…”

Investigation of mechanical properties of gold nanocoating using nanoindentation experiments

“…Nanoindentation has proven to be the simplest and most direct way to determine the mechanical properties of coatings (films). 1–10…”