Phase transition in boron nitride by ion irradiation under high pressure

Boron nitride (BN) does not exist as a natural mineral, but can be synthesized in its hexagonal (hBN) and cubic form (cBN). Both phases are stable at ambient conditions and are used in a variety of applications, e.g. as lubricant (hBN) or abrasive (cBN). hBN has a similar layered structure as graphite, whereas cBN is the second-hardest material after… CONTINUE READING