Effect of the Thermomechanical Compacting Conditions on the Electrical Conductivity of an Al2O3/Graphene Composite Material
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Abstract—The influence of the graphene content (up to 2 wt %) and the sintering conditions on the temperature dependence of the electrical resistance of an Al2O3/graphene composite material in the temperature range 20–1600°C is studied. The composite material is fabricated from a mixture of initial powders by spark plasma sintering and hot pressing. The electrical resistance of the compacted material is found to depend on the pressing force and a heating method. The composite material prepared by hot pressing has the minimum electrical resistivity (0.9 Ω m).
This work was supported by the Ministry of Education and Science of the Russian Federation for measuring the electrical resistance (project no. 11.1957.2017/4.6), by the Russian Science Foundation for the SPS preparation of the composite compacts (project no. 16-19-10213), and by National Research Nuclear University MEPhI in terms of the project of increasing the competitive ability of the leading Russian institutes of higher education (project no. 5-100).
- 3.H. J. Kim, S.-M. Lee, Y.-S. Oh, Y. H. Yang, Y. S. Lim, D. H. Yoon, C. Lee, J.-Y. Kim, and R. S. Ruoff, “Unoxidized graphene/alumina nanocomposite: fracture and wear resistance effects of graphene on alumina matrix,” Sci. Reports 4, art. 5176 (2014).Google Scholar
- 8.M. Drozdova, “Electroconductive oxide ceramics with hybrid graphenated nanofibers,” Thesis DPh. Tallin, Tallinn University of Technology, 2017.Google Scholar
- 10.O. Jankovskу́, P. Šimek, D. Sedmidubskу́, Š. Huber, M. Pumer, and Z. Sofer, “Towards highly electrically conductive and thermally insulating graphene nanocomposites: Al2O3/graphene,” Royal Soc. Chem. Adv. 15, 7418–7424 (2014).Google Scholar
- 11.K. Ahmad, W. Pan, and H. Wu, “High performance alumina based graphene nanocomposites with novel electrical and dielectric properties,” Royal Soc. Chem. Adv. 42 (5), 336071–336078 (2015).Google Scholar
- 13.P. Yu. Peretyagin, “Increasing the service properties of lathe tools equipped with ceramic cutting plates during the finish turning of a high-temperature alloy using graphene and spark plasma sintering,” Candidates’s Dissertation in Engineering (Moscow, 2017). http:// www.stankin.ru/science/dissertatsionnye-sovety/d-212-142-01/Peretyagin_P_U/Автореферат%20(Перетягин).pdf.Google Scholar
- 14.Materials in Mechanical Engineering. Choice and Application: A Handbook. Vol. 5. Nonmetallic Materials, Ed. by I. V. Kudryavtsev (Mashinostroenie, Moscow, 1969).Google Scholar
- 15.A. G. Zholnin, I. V. Kovaleva, P. N. Medvedev, E. G. Grigor’ev, E. A. Olevskii, M. G. Isaenkova, and P. L. Dobrokhotov, “Free sintering of aluminum delta- and alpha-oxide nanopowders subjected to magnetic pulsed pressing,” Fiz. Khim. Obrab. Mater., No. 1, 53–63 (2016).Google Scholar
- 16.V. V. Stolyarov, A. G. Zholnin, and E. A. Klyatskina, “Structure and properties of the Al2O3 + Γ composite material fabricated by spark plasma sintering,” in Advanced Materials and Technologies, Ed. by V. V. Klubovich (UO VGTU, Vitebsk, 2017), Vol. 1, pp. 92–107.Google Scholar
- 18.A. G. Zholnin, E. A. Klyatskina, E. G. Grigor’ev, M. D. Sal’vador, A. A. Misochenko, P. L. Dobrokhotov, M. G. Isaenkova, M. A. Sinaiskii, and V. V. Stolyarov, “Spark plasma sintering of an Al2O3–graphene nanocomposite material,” Fiz. Khim. Obrab. Mater., No. 4, 47–54 (2017).Google Scholar