Enhancement of toughness and wear resistance in boron nitride nanoplatelet (BNNP) reinforced Si3N4 nanocomposites.
作者： Bin Lee , Dongju Lee , Jun Ho Lee , Ho Jin Ryu , Soon Hyung Hong
DOI: 10.1038/SREP27609
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摘要: Ceramics have superior hardness, strength and corrosion resistance, but are also associated with poor toughness. Here, we propose the boron nitride nanoplatelet (BNNP) as a novel toughening reinforcement component to ceramics outstanding mechanical properties high-temperature stability. We used planetary ball-milling process exfoliate BNNPs in scalable manner functionalizes them polystyrene sulfonate. Non-covalently functionalized were homogeneously dispersed Si3N4 powders using surfactant then consolidated by hot pressing. The fracture toughness of BNNP/Si3N4 nanocomposite increased much 24.7% 2 vol.% BNNPs. Furthermore, enhanced (9.4%) tribological (26.7%) ceramic matrix. Microstructural analyzes shown that mechanisms combinations pull-out, crack bridging, branching blunting mechanisms.
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