Shockless Characterization of Ceramics Using High‐Pulsed Power Technologies

Effects of density on the mechanical properties of spark plasma sintered β-SiC

“…This is encouraging compared to results reported in the literature for Spark Plasma Sintered SiC. Indeed, authors generally report Young modulus values from 410GPa (Hexoloy® SA shade) to 442GPa for highly dense SiC (99%) sintered by SPS in solid state [24].…”

“…It is possible to observe that the average grains size increases from 160nm to 320nm according to an exponential law respectively for samples presenting densities of 80% and 95% of T.D.. Nevertheless, the microstructures of these four samples remain highly fine compared to the ones reported in the literature [24], [25] and suggest promising mechanical properties. These twins represent structural defects in the material The presence of structural defects is also noticed by the peak of stacking faults in the experimental XRD patterns (Figure 3).…”

“…Table 4 reports Vickers hardness measurements performed on samples NMK-80, NMK-85, NMK-90 and NMK-95, compared with the values reported in the literature for the Hexoloy® SA shade [24], [25] and for another SiC pellet sintered by SPS in solid state (called SPS-S) [24].…”

A pulse-shaping technique to investigate the behaviour of brittle materials subjected to plate-impact tests

“…The ceramic material considered in this investigation is silicon carbide (Hexoloy). This material was previously experimentally tested using shockless isentropic compression by means of the GEPI pulse power generator as discussed by Zinszner et al [28,9,29]. The first proposed experimental method is illustrated in figure 2a.…”

“…Ceramic materials can also be characterized using these generators. Indeed, Zinszner et al [28,29] have performed ICE on silicon carbides using the GEPI device and obtained longitudinal stresses in the ceramic material greater than 20 GPa. The same device was used by LaLone & Gupta [20] to characterize the elastic limit of x-cut quartz.…”