Influence of graphene oxide nanosheets and multi-walled carbon nanotubes on the thermoelectric and mechanical properties of Mg2(Si0.3Sn0.7)0.99Sb0.01
Influence of graphene oxide nanosheets and multi-walled carbon nanotubes on the thermoelectric and mechanical properties of Mg2(Si0.3Sn0.7)0.99Sb0.01
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DOI：
10.1016/j.scriptamat.2021.114103
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发表时间：
2021-06-29
影响因子：
6
通讯作者：
Zhai, Pengcheng
中科院分区：
文献类型：
--
作者：
Huang, Heming;Wen, Pengfei;Zhai, Pengcheng
实现热电性能和机械性能的同时提高，对热电材料的应用具有重要意义。在这里，我们制备了氧化石墨烯纳米片(GOS)和多壁碳纳米管(MWCNTs)增强的Mg-2(Si0.3Sn0.7)(0.99)Sb-0.01混杂复合材料。详细表征了GOS和MWCNTs对复合材料热电性能和力学性能的影响。结果表明，由于GOS和MWCNTs的协同作用，混杂复合材料的弯曲强度和断裂韧性均比GOS和MWCNTs单独增强的样品有明显的提高。同时，引入GO和MWCNT双重增强后，材料的无量纲优值系数基本保持不变，甚至略有提高。我们的工作为同时获得优异的机械和热电性能提供了一条可行的途径。(C)2021 Acta Materialia Inc.由爱思唯尔有限公司出版。保留所有权利。
Achieving the simultaneous improvement of thermoelectric and mechanical properties is of great significance for the application of thermoelectric materials. Here, we fabricate the bulks of Mg-2(Si0.3Sn0.7)(0.99)Sb-0.01 hybrid composites reinforced by graphene oxide nanosheets (GOs) and multi-walled carbon nanotubes (MWCNTs). The influences of GOs and MWCNTs on the thermoelectric and mechanical properties of the composites are characterized in detail. It is found that the hybrid composites exhibit obvious improvements in flexural strength and fracture toughness with respect to both the matrix and the samples reinforced by GOs or MWCNTs alone, owing to the remarkable synergistic effect of GOs and MWCNTs. Meanwhile, the dimensionless figures of merit are basically maintained or even slightly enhanced when dual reinforcements of GOs and MWCNTs are introduced. Our work provides a feasible path to obtain excellent mechanical and thermoelectric properties simultaneously. (C) 2021 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.