Fig. 4From: Controlled microstructure and mechanical properties of Al2O3-based nanocarbon composites fabricated by electrostatic assembly methoda Microstructure of 0.6 vol% CNP-Al2O3 composite using Al2O3 with the average diameter of 62 μm. b Grain boundary of CNP-Al2O3 composite. Carbon layer could be observed at the interface between the Al2O3 matrixBack to article page