Abstract
This work describes the results of plane shock wave experiments conducted on AD995 (99.5% pure alumina) to 11.3 GPa. with a density of 3.880±0.003 Mg/m3. The results of the shock wave experiments may be summarized as follows: (i) The Hugoniot Elastic Limit of the alumina is 6.71±0.08 GPa; (ii) The spall threshold of the material varies between 0.43 and 0.46 GPa when shock compressed to 8.3 GPa; (iii) The spall threshold of the material becomes negligibly small when shocked above 8.8 GPa; (iv) The deformation behavior of the material above its HEL is quasi‐elastoplastic; (v) The tensile impedance of the material is elastic as long as it has a finite tensile strength and the vanishing of its tensile strength is accompanied by a 70% reduction in its impedance, compared to the elastic impedance.
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