Structural changes and phase stability of graphitelike BC3 under explosive shock-wave loading

T. de Resseguier (1) , O. Kurakevych (2) , A. Chabot (1) , J. P. Petitet (3) , V. L. Solozhenko (3)

1 PPrime [Poitiers] - Institut Pprime [UPR 3346]
2 IMPMC - Institut de minéralogie et de physique des milieux condensés
3 Laboratoire des Propriétés Mécaniques et Thermodynamiques des Matériaux (UPR 9001), Université Paris Nord

The response of graphitelike BC3 phases t-BC3 to shock-wave loading has been studied using two types of high explosives, in order to investigate the possible routes to synthesize via dynamic compression superhard materials in the form of high-pressure phases such as the B-doped diamond produced recently under high static pressures and temperatures. The loading conditions resulting from wave propagation in the shock recovery setup have been determined from theoretical predictions confirmed by numerical simulations and velocity measurements. Over the explored range of shock pressure from 10 to 30 GPa, no detectable diamond phase could be quenched, probably because of insufficient temperature, but Raman and x-ray diffraction studies of the recovered samples indicate permanent structural changes that have been compared to those observed after shorter, laser driven shock compression. These changes include local phase segregation of t-BC3 and the production of highly disordered phases.

Domaines: Autre [cond-mat.other]

T. de Resseguier, O. Kurakevych, A. Chabot, J. P. Petitet, V. L. Solozhenko. Structural changes and phase stability of graphitelike BC3 under explosive shock-wave loading. Journal of Applied Physics, 2010, 108, pp.083522. ⟨10.1063/1.3499303⟩. ⟨hal-00568767⟩