Low temperature synthesis of bulk Boron Nitride Nanoplatelets with and without metallic binder

Boron Nitride Nanoplatelets (BNNP) are consolidated into a bulk form using a low energy processing route that consisted of cryogenic milling, cold isostatic pressing, and a short, mild heat treatment. X-ray diffraction analysis was performed to confirm the presence of the secondary metallic constituent and the different phases of Boron Nitride (BN). Unique features of BNNP such as platelet stacking and kinking are retained. A secondary metallic constituent is also included to improve processability and to enhance structural support in the bulk structure. Mechanical properties were evaluated using microhardness testing and nanoindentation. Relative density, elastic modulus, and hardness increased with the incorporation of Al binder contents of as low as 10 vol %. A high degree of load transfer efficiency is demonstrated in higher metallic binder content composites (50 vol % Al) by comparing theoretical and experimentally measured microhardness values. This study presents a novel template for manufacturing bulk 2D nanomaterials using simple and low energy processing.

Automated summary

The study successfully consolidated Boron Nitride Nanoplatelets (BNNP) into a bulk form using a low energy processing route, retaining unique features of BNNP such as platelet stacking and kinking, and introducing a secondary metallic constituent to improve processability and enhance structural support. With the incorporation of Al binder contents as low as 10 vol %, the relative density, elastic modulus, and hardness increased.