Multifunctional carbon nanofiber-reinforced Ge25Sb10S65 chalcogenide glassy composites |
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| Affiliation: | 1. State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, Wuhan, 430070, China;2. Institut Des Sciences Chimiques de Rennes UMR 6226, CNRS, Université de Rennes 1, Rennes, 35042, France;1. Lomonosov Moscow State University, Vorobievy Gory 1, Moscow, 119991, Russia;2. Laboratory of Arctic Mineralogy and Material Sciences Kola Science Centre RAS, Apatity, 184209, Russia;1. Anhui Engineering Research Center for High Efficiency Intelligent Photovoltaic Module, Chaohu University, Hefei, 238000, China;2. College of Mechanical Engineering, Chaohu University, Hefei, 238000, China;1. College of Materials and Chemistry & Chemical Engineering, Chengdu University of Technology, Chengdu, 610059, China;2. Mineral Development Section, Department of Mines, Ministry of Natural Resources and Environmental, Nay Pyi Taw, 15011, Myanmar |
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| Abstract: | Carbon nanomaterials have wide applications in sensors, batteries, electromagnetic shielding, and mechanical reinforcement. Here, carbon nanofiber (CNF)-reinforced Ge25Sb10S65 chalcogenide glassy composites with excellent mechanical and electrical properties were obtained. These glassy composites maintained the amorphous properties of glass. Thermodynamic parameters, microscopic morphology, and structural characteristics were further studied. Benefiting from the remarkable high strength and conductivity of CNFs, as well as the great interface connection between CNFs and glass, the electrical and mechanical properties of glassy composites were greatly enhanced. The Vickers hardness improved by 36% (from 200 kg/mm2 to 272 kg/mm2), the tensile modulus increased from 45.9 GPa to 57 GPa, and the shear modulus increased from 22.2 GPa to 23.7 GPa when the CNF concentration increased from 0 wt% to 3.0 wt%. Furthermore, DC conductivity was raised by several orders of magnitude compared with bulk glass at 293 K (from 4.55 × 10?10 S/cm to 3.15 × 10?4 S/cm) owing to the formation of a continuous conductive network. Thus, these CNF-reinforced glassy composites provide a new way for realizing multifunctional composites. |
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| Keywords: | Carbon nanofibers Chalcogenide glass Glassy composites DC conductivity Mechanical performance |
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