Thermal Properties of Graphene Reinforced Fe-CrNi-Cu Alloys Produced by Powder Metallurgy
Yuksel Akınay Muhammet Emre Turan
AbstractIn this study thermal properties of graphene reinforced Fe-Cr-Ni-Cu alloys were investigated. This alloys were produced with a two-step process. Firstly, Fe, Cr, Cu, Ni powders were mechanically milled for homogenous mixing. Secondly, these powders were cold pressed and sintered at 1150oC. For comparative study, graphene (GNP) powders were milled with Fe, Cr, Cu, Ni powders and finally, these powders were pressed and sintered at 1150oC. Hence, two types of alloys i.e Fe-Cr-Cu-Ni and graphene reinforced Fe-Cr-Cu-Ni were produced. The specimens were evaluated by thermal, microstructure and mechanical properties. DSC and TGA analysis was carried out for determining the melting points, phase transformations and entropy values. It was found that the graphene reinforced-alloy exhibits lower entropy values than that of obtained from Fe-CrCu-Ni. But the existence of graphene has increased the melting point of alloy. However, the existence of graphene has reduced compression strength of alloy.