Abstract
We have performed shock-wave loading of hexagonal boron nitride under pressures of10.8–16 GPa in the range of initial temperatures of20–500°C in flat recovery ampoules allowing one to sustain residual pressures of ∼1 GPa. To form a plane shock wave, a gas gun was used. Application of a residual pressure under the action of a shock wave with an intensity of16 GPa increased the yield of wurtzite boron nitride by4 to5 times. This explained on the basis of the assumption of wurtzite formation from the amorphous phase in high-temperature zones of adiabatic shear in the residual regime.
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