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Grigoriev S, Smirnov A, Pinargote NWS, Yanushevich O, Kriheli N, Kramar O, Pristinskiy Y, Peretyagin P. Evaluation of Mechanical and Electrical Performance of Aging Resistance ZTA Composites Reinforced with Graphene Oxide Consolidated by SPS. Materials (Basel) 2022; 15:ma15072419. [PMID: 35407750 PMCID: PMC8999467 DOI: 10.3390/ma15072419] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/28/2022] [Revised: 03/17/2022] [Accepted: 03/23/2022] [Indexed: 02/01/2023]
Abstract
This paper presents a study of Al2O3–ZrO2 (ZTA) nanocomposites with different contents of reduced graphene oxide (rGO). The influence of the rGO content on the physico-mechanical properties of the oxide composite was revealed. Graphene oxide was obtained using a modified Hummers method. Well-dispersed ZTA-GO nanopowders were produced using the colloidal processing method. Using spark plasma sintering technology (SPS), theoretically dense composites were obtained, which also reduced GO during SPS. The microstructure, phase composition, and physico-mechanical properties of the sintered composites were studied. The sintered ZTA composite with an in situ reduced graphene content of 0.28 wt.% after the characterization showed improved mechanical properties: bending strength was 876 ± 43 MPa, fracture toughness—6.8 ± 0.3 MPa·m1/2 and hardness—17.6 ± 0.3 GPa. Microstructure studies showed a uniform zirconia distribution in the ZTA ceramics. The study of the electrical conductivity of reduced graphene oxide-containing composites showed electrical conductivity above the percolation threshold with a small content of graphene oxide (0.28 wt.%). This electrical conductivity makes it possible to produce sintered ceramics by electrical discharge machining (EDM), which significantly reduces the cost of manufacturing complex-shaped products. Besides improved mechanical properties and EDM machinability, 0.28 wt.% rGO composites demonstrated high resistance to hydrothermal degradation.
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Affiliation(s)
- Sergey Grigoriev
- Spark Plasma Sintering Research Laboratory, Department of High-Efficiency Machining Technologies, Moscow State University of Technology “STANKIN”, Vadkovsky per. 1, Moscow 127055, Russia; (S.G.); (N.W.S.P.); (Y.P.)
| | - Anton Smirnov
- Spark Plasma Sintering Research Laboratory, Department of High-Efficiency Machining Technologies, Moscow State University of Technology “STANKIN”, Vadkovsky per. 1, Moscow 127055, Russia; (S.G.); (N.W.S.P.); (Y.P.)
- Correspondence: (A.S.); (P.P.); Tel.: +7-4999-7323-70 (A.S. & P.P.)
| | - Nestor Washington Solis Pinargote
- Spark Plasma Sintering Research Laboratory, Department of High-Efficiency Machining Technologies, Moscow State University of Technology “STANKIN”, Vadkovsky per. 1, Moscow 127055, Russia; (S.G.); (N.W.S.P.); (Y.P.)
| | - Oleg Yanushevich
- Scientific Department, A.I. Yevdokimov Moscow State University of Medicine and Dentistry, Moscow 127473, Russia; (O.Y.); (N.K.); (O.K.)
| | - Natella Kriheli
- Scientific Department, A.I. Yevdokimov Moscow State University of Medicine and Dentistry, Moscow 127473, Russia; (O.Y.); (N.K.); (O.K.)
| | - Olga Kramar
- Scientific Department, A.I. Yevdokimov Moscow State University of Medicine and Dentistry, Moscow 127473, Russia; (O.Y.); (N.K.); (O.K.)
| | - Yuri Pristinskiy
- Spark Plasma Sintering Research Laboratory, Department of High-Efficiency Machining Technologies, Moscow State University of Technology “STANKIN”, Vadkovsky per. 1, Moscow 127055, Russia; (S.G.); (N.W.S.P.); (Y.P.)
| | - Pavel Peretyagin
- Spark Plasma Sintering Research Laboratory, Department of High-Efficiency Machining Technologies, Moscow State University of Technology “STANKIN”, Vadkovsky per. 1, Moscow 127055, Russia; (S.G.); (N.W.S.P.); (Y.P.)
- Scientific Department, A.I. Yevdokimov Moscow State University of Medicine and Dentistry, Moscow 127473, Russia; (O.Y.); (N.K.); (O.K.)
- Correspondence: (A.S.); (P.P.); Tel.: +7-4999-7323-70 (A.S. & P.P.)
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