2024/11/22 by Pedro Altero Parra, Parra, Pedro A., Eliezer Fernando Oliveira +1
Engineering · #FOS: Physical sciences #Fiber-reinforced polymer composites #Materials Science (cond-mat.mtrl-sci)
paper · pdf · doi:10.48550/arxiv.2411.14888
openalex publication_date 2024/11/22 · openalex created_date 2024/12/04 · openalex updated_date 2026/07/28
Using molecular dynamics simulations and the ReaxFF force field, we studied a composite based on cubic (c-BN) and hexagonal (h-BN) boron nitride subjected to different temperatures to verify the possibility of a c-BN to h-BN phase transition. Our results demonstrate that the surface termination of c-BN (whether B- or N-terminated) is a crucial factor in the phase transition. The B-terminated c-BN surface presents a lower potential energy than the N-terminated one. However, compared to the potential energy of h-BN, the B- (N-) terminated c-BN surface has a lower (higher) potential energy than h-BN. As the temperature increases, the potential energy of the B-terminated c-BN surface gradually approaches that of h-BN, leading to the beginning of detachment into an h-BN layer around 700 K. With further temperature increase, free h-BN layers can form, which will modify the properties of the composite.