Abstract
The B4C/BN composites were fabricated by hot-pressing process in this research. The B4C/BN composites included the B4C/BN microcomposites and the B4C/BN nanocomposites. The B4C/BN microcomposites were fabricated by hot-pressing process, and the B4C/BN nanocomposites were fabricated by chemical reaction and hot-pressing process. In this research, the phase composition of the B4C/BN microcomposites and the B4C/BN nanocomposites were investigated by XRD analysis. The XRD patterns results showed that there existed the B4C phase and h-BN phase in the hot-pressed composites. The microstructure of the B4C/BN microcomposites and the B4C/BN nanocomposites sintered bulks were investigated by SEM and TEM. The SEM micrographs showed that the B4C/BN microcomposites and the B4C/BN nanocomposites sintered bulks exhibited the homogenous and compact microstructure, and the h-BN particles were homogenously distributed in the B4C matrix. The TEM micrographs showed that there existed the weak interface between the B4C matrix grains and h-BN particles as well as the microcracks within the laminate structured h-BN particles.
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