A group from Yanshan University report the synthesis of a bulk BN ceramic composed of three-dimensional interlocked BN nanoplates whose vdW layers form a laminated structure with various twisting angles. The twisted-layer bulk ceramic was synthesized from onion-like BN (oBN) nanoparticles using conventional spark plasma sintering (SPS) and hot-pressing sintering. This twisted-layer bulk ceramic shows exceptional deformability (up to 14% compressive strain) and plasticity (up to 8% permanent deformation) and high strength at room temperature. These remarkable properties have long been sought in engineering ceramics, which usually have very poor deformability with essentially no plasticity. The advent of this twisted-layer boron nitride bulk ceramic opens a gate to the fabrication of highly deformable bulk ceramics.
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