Nanosheet-structured B<sub>4</sub>C with high hardness up to 42 GPa

Nanosheet-structured B₄C with high hardness up to 42 GPa

Wang Chang-Chun^{1, †}, Song Le-Le^{1, 2}

Surface morphology of the oxidized B₄C heated in the air at temperatures (a) 700 °C and (b) 1100 °C.