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Evaluation of Mechanical and Electrical Performance of Aging Resistance ZTA Composites Reinforced with Graphene Oxide Consolidated by SPS

This paper presents a study of Al(2)O(3)–ZrO(2) (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-d...

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Autores principales: Grigoriev, Sergey, Smirnov, Anton, Pinargote, Nestor Washington Solis, Yanushevich, Oleg, Kriheli, Natella, Kramar, Olga, Pristinskiy, Yuri, Peretyagin, Pavel
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8999467/
https://www.ncbi.nlm.nih.gov/pubmed/35407750
http://dx.doi.org/10.3390/ma15072419
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author Grigoriev, Sergey
Smirnov, Anton
Pinargote, Nestor Washington Solis
Yanushevich, Oleg
Kriheli, Natella
Kramar, Olga
Pristinskiy, Yuri
Peretyagin, Pavel
author_facet Grigoriev, Sergey
Smirnov, Anton
Pinargote, Nestor Washington Solis
Yanushevich, Oleg
Kriheli, Natella
Kramar, Olga
Pristinskiy, Yuri
Peretyagin, Pavel
author_sort Grigoriev, Sergey
collection PubMed
description This paper presents a study of Al(2)O(3)–ZrO(2) (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·m(1/2) 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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spelling pubmed-89994672022-04-12 Evaluation of Mechanical and Electrical Performance of Aging Resistance ZTA Composites Reinforced with Graphene Oxide Consolidated by SPS Grigoriev, Sergey Smirnov, Anton Pinargote, Nestor Washington Solis Yanushevich, Oleg Kriheli, Natella Kramar, Olga Pristinskiy, Yuri Peretyagin, Pavel Materials (Basel) Article This paper presents a study of Al(2)O(3)–ZrO(2) (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·m(1/2) 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. MDPI 2022-03-25 /pmc/articles/PMC8999467/ /pubmed/35407750 http://dx.doi.org/10.3390/ma15072419 Text en © 2022 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Grigoriev, Sergey
Smirnov, Anton
Pinargote, Nestor Washington Solis
Yanushevich, Oleg
Kriheli, Natella
Kramar, Olga
Pristinskiy, Yuri
Peretyagin, Pavel
Evaluation of Mechanical and Electrical Performance of Aging Resistance ZTA Composites Reinforced with Graphene Oxide Consolidated by SPS
title Evaluation of Mechanical and Electrical Performance of Aging Resistance ZTA Composites Reinforced with Graphene Oxide Consolidated by SPS
title_full Evaluation of Mechanical and Electrical Performance of Aging Resistance ZTA Composites Reinforced with Graphene Oxide Consolidated by SPS
title_fullStr Evaluation of Mechanical and Electrical Performance of Aging Resistance ZTA Composites Reinforced with Graphene Oxide Consolidated by SPS
title_full_unstemmed Evaluation of Mechanical and Electrical Performance of Aging Resistance ZTA Composites Reinforced with Graphene Oxide Consolidated by SPS
title_short Evaluation of Mechanical and Electrical Performance of Aging Resistance ZTA Composites Reinforced with Graphene Oxide Consolidated by SPS
title_sort evaluation of mechanical and electrical performance of aging resistance zta composites reinforced with graphene oxide consolidated by sps
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8999467/
https://www.ncbi.nlm.nih.gov/pubmed/35407750
http://dx.doi.org/10.3390/ma15072419
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