Indentation plasticity of barium titanate single crystals: Dislocation influence on ferroelectric domain walls

Correlation between hardness and elastic moduli of the ultraincompressible transition metal diborides RuB2, OsB2, and ReB2

“…The mechanisms of pop-in events observed in other materials are associated with a burst of dislocations, cracking, and elastic-plastic deformation transitions. [19][20][21][22] However, the discontinuities reported here result from crack initiation and propagation around the indentations, since there are no cracks observed near the indentation when the applied load is lower than that for the first pop-in event. In OsB 2 , cracks form in grains oriented with the ͕010͖ planes at the lower critical force.…”

Periodic indentation patterns fabricated on AlGaInP light emitting diodes and their effects on light extraction

“…For spherical indentation on crystals, previous studies revealed that fractures occur along the cleavage planes due to dislocation pileups. 25 The intersection of {110} planes with (511) plane lead to the formation of crack path in <1 6 -1> and <11 6 -> crystallographic directions with an intersection angle of 105°, as revealed in Fig. 2(c).…”

Analyzing indentation stress–strain response of LaGaO3 single crystals using spherical indenters

“…Similar pure elastic behavior before pop-in has also been observed during nanoindentation testing of BaTiO 3 single crystals. 22 In the case where the sample is loaded to a load level lower than that required to cause the pop-in (for the 2 mN load-unload cycle using the 1 m spherical indenter, Fig. 2c-d), the indentation stress-strain curve shows almost complete elastic behavior where the unloading curve retraces the loading part.…”