Characterization and micro end milling of graphene nano platelet and carbon nanotube filled nanocomposites

Graphene and carbon nanotubes (CNTs) have been used in polymeric nanocomposites for improved mechanical, electrical, thermal and gas barrier properties. As the major applications of these relatively new materials are expected to be in the micro/meso-scale, their micro-machinability needs to be inves...

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Bibliographic Details
Published in:Journal of materials processing technology 2017-11, Vol.249, p.96-107
Main Authors: Kumar, M. Naresh, Mahmoodi, M., TabkhPaz, M., Park, S.S., Jin, X.
Format: Article
Language:English
Subjects:
Activation
Austenitic stainless steels
Carbon nanotube
Characterization
Conducting
Cross rolling
Finite element modeling
Grain boundaries
Grain size
Grain structure
Graphene nano platelet
Heat treatment
Injection molding
Micro end milling
Recrystallization
Stainless steel
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Summary:Graphene and carbon nanotubes (CNTs) have been used in polymeric nanocomposites for improved mechanical, electrical, thermal and gas barrier properties. As the major applications of these relatively new materials are expected to be in the micro/meso-scale, their micro-machinability needs to be investigated. In this study, graphene nano platelet (GNP) and multi-walled carbon nanotube (MWCNT) filled polycarbonate (PC) nanocomposites were fabricated through injection molding. The molded nanocomposites were characterized for their thermal and mechanical properties. Micro mechanical machining was performed on the molded specimens to understand the material removal behavior. The micro cutting forces were measured and compared for the fabricated GNP and MWCNT filled nanocomposites. The experimental results showed that the GNP filled PC nanocomposites required higher cutting forces than plain PC. The chip morphologies of the materials were explored under scanning electron microscopy. Finite element (FE) model of machining PC and PC-GNP nanocomposites was developed to determine the fundamental mechanisms of chip formation and surface generation due to the inclusion of the GNP fillers. The FE model was validated by the comparison of simulated and experimental micro milling forces. The results of this study show that the addition of GNP and MWCNT can significantly improve the dimensional accuracy and the quality of the machined surfaces.
ISSN:0924-0136
1873-4774
DOI:10.1016/j.jmatprotec.2017.06.005