| AVS 63rd International Symposium & Exhibition | |
| Manufacturing Science and Technology | Tuesday Sessions |
| Session MS-TuP |
| Session: | Aspects of Manufacturing Science and Technology Poster Session |
| Presenter: | Yusuke Oguro, Aichi Institute of Technology, Japan |
| Authors: | Y. Oguro, Aichi Institute of Technology, Japan A. Matsumuro, Aichi Institute of Technology, Japan |
| Correspondent: | Click to Email |
Basic science of graphene with various superior characteristics has been made clear rapidly on the frontier technology. Especially, development of superior nano-scale electronic devices and bio systems has been studied energetically. Nevertheless, various surprising mechanical properties of graphene have been not attracted great attention, such as extreme low density, tensile strength with 100 times stronger than steel by weight, Young’s modulus with 1 TPa and more flexible than rubber. Since our original successful isolation techniques of creating single layer nanographene sheets from nanographene with a several sheet and uniforming dispersion of nanographene within based materials, we have been challenging in fabrication innovative nanographene reinforced Al composite sintered materials and established the fabrication method. It has already been demonstrated that Vickers hardness of nanographene/Al composite pellet-formed sintered materials showed the maximum value of 323 Hv, which means about 5 times up in comparison with that of Al bulk material, and the density decreased down to 2.45 g/cm3 . So, the specific strength increased up to 414 kN・m/kg. The value increased up to 1.4 times for sintered Al material, and the value surprisingly exceeded that of commercial used magnesium alloys. These results would suggest bringing a change in the concept of industrial use materials.
In this study, we investigated possibility that industrial applications of our nanographene /Al composite materials would take advantage of their bulk properties. Standard flat-plate type specimens consisted of our nanographene/Al composite materials were fabricated under the same sintered condition in order to compare various mechanical properties of the standard data. Bending, tensile and fatigue mode tests were performed in precisely. Elastic and fracture properties were analyzed using four-point bending test apparatus without few artificial errors. The results revealed that Young’s modulus increased from 40 GPa of sintered Al up to 45 GPa of nanographene/Al composite materials. Fracture characteristics showed that the breaking stress of the composite material showed drastic improvement up to 75 %, and the breaking strain of the composite material also increased up to 70 %. These great improvements of mechanical properties can be attributed to reinforcement effect of nanographene. Other mechanical properties tests should show the same tendency. Therefore, nanographene/Al composite materials give us excellent possibility of the innovative industrial use materials with a promising future.