Phase transition between cubic-BN and hexagonal BN upon pulsed laser induced liquid–solid interfacial reaction

The phase transformation between cubic boron nitride (c-BN) and hexagonal boron nitride (h-BN) from the c-BN nanocrystals synthesis by pulsed laser induced liquid–solid interfacial reaction (PLIIR) was studied by calculating the probability of phase transition of the h-BN structure over a potential barrier in boron nitride equilibrium phase diagram. Consequently, we found that the probability of phase transition from h-BN to c-BN goes up to 10−5–10−4 in the pressure–temperature region of 5–6 GPa and 2500–3500 K created by PLIIR. Furthermore, the probability distribution of the phase transition from h-BN to c-BN was obtained in the corresponding pressure–temperature region, and the dependence of phase transition probability on temperature was found to be in agreement with the Arrhenius rule.