Investigation of Phase Composition and Microstructure Characterization of the B₄C/BN Composites Fabricated by Hot-Pressing Process

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.

• Periodical: Advanced Materials Research (Volumes 399-401)
• Pages: 465-468
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.399-401.465
• Online since: November 2011
• Authors: Tao Jiang
• Keywords: B₄C/BN Composites, Hot-Pressing Process, Microstructure, Phase Composition

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