Al2O3晶须与石墨烯纳米片共增强铜基复合材料的显微结构及界面行为(英文) |
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引用本文: | 邵甄胰,潘恒康,舒锐,蒋小松,朱旻昊.Al2O3晶须与石墨烯纳米片共增强铜基复合材料的显微结构及界面行为(英文)[J].中国有色金属学会会刊,2022,32(9):2935-2947. |
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作者姓名: | 邵甄胰 潘恒康 舒锐 蒋小松 朱旻昊 |
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作者单位: | 1. 西南交通大学材料科学与工程学院;2. 成都工业学院材料与环境工程学院;3. Forschungszentrum Jülich GmbH, Institut für Energie-und Klimaforschung-Plasmaphysik |
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基金项目: | the financial supports from the National Natural Science Foundation of China (No. 52101183);;China Postdoctoral Science Foundation (Nos. 2017M623054, 2018T110993); |
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摘 要: | 研究Al2O3晶须和石墨烯纳米片共增强铜基复合材料的力学性能和显微结构。采用机械合金化、真空热压烧结和热等静压工艺制备不同石墨烯含量的铜基复合材料。含0.5%石墨烯(质量分数)的铜基复合材料(GNP-0.5)具有良好的Cu/C和Cu/Al2O3界面结合性能;复合材料的硬度和抗压强度随石墨烯含量的增加呈现先增加到一个临界值后减小的趋势。研究结果表明,石墨烯和Al2O3晶须在铜基复合材料中最主要的强化机制是能量耗散和载荷传递以及石墨烯导致的晶粒细化。石墨烯与Al2O3晶须的双相混杂增强效应在于:当Al2O3/Cu界面存在微裂纹并沿着界面扩展时,嵌于铜基复合材料中的石墨烯会阻碍裂纹扩展路径,从而强化Al2O3晶须在铜基复合材料中的增强作用。
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关 键 词: | 石墨烯 Al2O3晶须 铜基复合材料 显微结构 界面行为 |
收稿时间: | 27 September 2021 |
Microstructures and interfacial interactions of Al2O3 whiskers and graphene nano-platelets co-reinforced copper matrix composites |
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Affiliation: | 1. School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu 610031, China;2. School of Materials and Environmental Engineering, Chengdu Technological University, Chengdu 611730, China;3. Forschungszentrum Jülich GmbH, Institut für Energie-und Klimaforschung-Plasmaphysik, 52425 Jülich, Germany |
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Abstract: | The mechanical properties and microstructures of Al2O3 whiskers and graphene nano-platelets (GNPs) co-reinforced Cu-matrix composites were studied. Cu-matrix composites with a variation of GNPs amount were fabricated by mechanical alloying followed by vacuum hot-pressing sintering and hot isostatic pressing. The Cu-matrix composite with 0.5 wt.% GNPs (GNPs-0.5) suggests a good interfacial bonding of both Cu/C and Cu/Al2O3 interfaces. Both the hardness and compressive strength of Cu-matrix composites show a consistent tendency that firstly increases to a critical value and then decreases with increasing GNPs amount. It is suggested that the most possible strengthening mechanisms of both GNPs and Al2O3 whisker working in the Cu-matrix composites involve energy dissipating and load transfer, as well as grain refinements for GNPs. The synergetic effect of GNPs and Al2O3 whiskers is highlighted that the embedded GNPs would hinder the crack path generated at the Al2O3/Cu interface and enhance the already outstanding strengthening effect that Al2O3 whiskers provide. |
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Keywords: | graphene Cu-matrix composite microstructure interfacial interaction |
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