Characterization of pop-in phenomena and indentation modulus in a polycrystalline ZrB2 ceramic

Reactive Spark Plasma Sintering and Mechanical Properties of Zirconium Diboride–Titanium Diboride Ultrahigh Temperature Ceramic Solid Solutions

“…This phenomenon could happen due to various reasons: (1) phase transformation; (2) dislocation generation under the indenter; and (3) critical resolved shear stress being reached at that particular load. A similar kind of pop-in phenomenon was observed by Guicciardi et al [27] in the ZrB2-SiC composite. They have reported that pop-in was observed when the indentations were made inside the grains.…”

Synthesis, microstructure, and mechanical properties of YPd3B thin films

“…Fig. 6 compares the critical shear stresses for a variety of materials available in the literature (Cu [37][38][39], Al [37], Au [40,41], Ag [42], Ni [39,43,44], Ta [45], Fe/steel [44,46,47], Mo [43], W [36,44,48], Ir [49], Cr 3 Si [50], GaN [51], MgO [52], Al 2 O 3 [53], ZrN [54], ZrB 2 [55], SiC [56]) with those for the YPd 2.73 B 1.18 and Pd films in the present study. The corresponding shear moduli are obtained from the literature [7,14,[57][58][59][60][61][62][63][64][65].…”

Plasticity in ZrB2 micropillars induced by anomalous slip activation

“…In the last 40 years, several investigations focused on understanding the hardness anisotropy and possible deformation mechanisms at room and elevated temperatures in ZrB 2 single crystals [10][11][12] and polycrystalline composites [13][14][15][16]. One of the first studies on hardness anisotropy was performed by Nakano et al [10] using Knoop microhardness testing on (0001) basal, 1010 and 1120 type prismatic oriented planes in ZrB 2 single crystals at room temperature.…”

“…Recent scratch [13,14] and indentation [16][17][18] investigations on polycrystalline ZrB 2 and ZrB 2 -SiC composites have also revealed readily detectable plastic deformation features in the form of slip-lines. Ghosh [14].…”