Structural transformations in laser shock-loaded quartz

摘要: The kinetics of the phase transitions occurring in solid materials under strong compression are an issue considerable interest, which can be studied using dynamic loading processes. Here, we investigate transformation behavior quartz laser-induced shock a very short duration (nanosecond order). Time-resolved measurements, coupled with simple computer simulations, have been used to characterize pressure pulse induced samples. Recovery shots performed for postshock spectroscopy, that has revealed permanent structural changes various types, depending on experimental conditions (loading pressure, sample thickness, and initial temperature). results, differ notably from observations reported quasi-static or longer pulsed loads (microsecond order), suggest partial amorphization shocked samples, as well formation structure compared known orthorhombic high-pressure phases. They provide a...