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http://dx.doi.org/10.14775/ksmpe.2013.12.6.003

Material properties and machining performance of CNT and Graphene reinforced hybrid alumina composites for micro electrical discharge machining  

Sung, Jin-Woo (Pusan National Univ., Graduate School of Convergence Science)
Kim, Nam-Kyung (Gyeongnam National Univ., of Science and Technology)
Kang, Myung-Chang (Pusan National Univ., Graduate School of Convergence Science)
Publication Information
Journal of the Korean Society of Manufacturing Process Engineers / v.12, no.6, 2013 , pp. 3-9 More about this Journal
Abstract
Aluminum Oxide($Al_2O_3$) ceramics are excellent candidates for such applications due to their outstanding mechanical, thermal, and tribological properties. However, they are difficult to machine using conventional mechanical methods. Carbon fillers, such as carbon nanotubes(CNT) and graphene nanoplatelets(GNP)can be dispersed in a ceramic matrix to improve the mechanical and electrical properties. In this study, CNT and Graphene reinforced hybrid ceramic composites were fabricated using the spark plasma sintering method at a temperature of $1,500^{\circ}C$, pressure of 40 MPa, and soaking time of 10min. Besides this, the material properties such as microstructure, crystal structure, hardness, and electrical conductivity were analyzed using FE-SEM, XRD, Vickers, and the 4-point probe method. A micro machining test was carried out to compare the effects of the material properties and the machining performance for CNT and Graphene reinforced ceramic composites.
Keywords
Carbon nanotube; Graphene; Aluminum Oxide; Spark Plasma Sintering; Micro-electrical discharge machining;
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