Effects of graphene pull‐out on the interfacial mechanical properties of alumina/graphene nanocomposite ceramic tool materials: Molecular dynamics analysis and material preparation
Source abstract
Abstract
Abstract The interfacial mechanical properties of the alumina/graphene (Al 2 O 3 /GR) nanocomposite ceramic tool materials were studied by molecular dynamic simulations. The effects of pull‐out velocity of graphene, system temperature, vacancy defect, and wrinkled graphene on the interfacial mechanical properties were investigated. Results show that a large interfacial shear stress (382 MPa) exists between the Al 2 O 3 /GR interface. The maximum pull‐out force and interfacial shear stress increase with increasing graphene pull‐out velocity. The increase of temperature reduces the maximum pull‐out force and interfacial shear stress. Moreover, the load transfer capacity is reduced and the creep of the matrix occurs. These factors reduce the fracture toughness of the Al 2 O 3 /GR nanocomposites. A moderate amount of vacancy defects in graphene increases the interfacial pull‐out force and shear stress of Al 2 O 3 /GR nanocomposite ceramic tool. Compared with Al 2 O 3 /GR nanocomposite ceramic tools, the interfacial interaction energy and shear stress of pleated graphene and Al 2 O 3 were increased by 13.87% and 41.08% respectively, with better toughening and reinforcement. The results are of significance in further understanding of the interfacial mechanical properties at the nanoscale and then beneficial to improve the mechanical properties and engineering performance of Al 2 O 3 /GR composite ceramic materials.
Source: crossref · Quality: baseline
Research context
OpenAlex topics: Advanced ceramic materials synthesis · Advanced materials and composites · Diamond and Carbon-based Materials Research
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
School of Mechanical Engineering Qilu University of Technology (Shandong Academy of Sciences) Jinan China
Key Laboratory of Equipment Manufacturing and Intelligent Measurement and Control, China National Light Industry Qilu University of Technology (Shandong Academy of Sciences) Jinan China
Shandong Machinery Design and Research Institute Jinan China
Funding
National Natural Science Foundation of China
References (54)
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