Open AccessEffect of graphene nano-platelet reinforcement on the mechanical properties of pressureless-sintered boron carbide
Author(s) -
Z. P. Li,
Xiao Gao,
G. Q. Lin,
Shaofan Sun,
K. Li,
Shuang Yang,
Shaoli Fang,
W. Zhang,
T. Zhang,
Yihang Wu
Publication year - 2021
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1721/1/012039
Subject(s) - materials science , graphene , fracture toughness , flexural strength , boron carbide , composite material , scanning electron microscope , microstructure , composite number , toughness , sintering , nanotechnology
Boron carbide (B 4 C) doped with graphene nano-platelet (GNP) as reinforcement has been prepared by pressureless sintering. Effect of GNP addition on mechanical properties of the composite, such as fracture toughness, hardness, flexural strength was investigated. Phase evolution and microstructure was characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM). Results demonstrated that addition of GNP improved the fracture toughness (KIC) of B 4 C with the decrease of hardness, flexural strength. The fracture toughness (KIC) can reach 4.45 MPam 1/2 with 1wt% addition of GNP, which was 49.3% higher than that of the composite without graphene platelets. It was found that the toughening mechanism can be contributed to pulling-out of graphene platelets, crack deflection, bridging and branching.