Shock-Induced Phase Transitions of Single Crystal InSb along (111) Axis

Shock-induced phase transition along the (111)-axis of InSb single crystal were studied by using light-gas-gun techniques, along with the influences of shear stress on the phase transition. Shock pressure ranges from 1.75 to 3.8 GPa. It is found that the incipient pressure of phase transition for InSb single crystal shifted from 2.3 GPa under static compression to 1.727 GPa under shock loading. The maximum relative strain of volume (V/V0) equals to 15.31%, corresponding to the maximum shear stress of 0.681 GPa. Shear stress level is about 83% and the average hydrostatic pressure of phase transition decreased from 2.3 GPa under static to 0.823 GPa under shock. Therefore shear stress will have great effects on induction of the phase transition in InSb single crystal.