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In-situ synthesis of CNTs@A1_2O_3 wrapped structure in aluminum matrix composites with balanced strength and toughness

机译：原位合成CNTS @ A1_2O_3在铝基复合材料中的包装结构，具有平衡强度和韧性

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摘要

For nanocarbon reinforced aluminum matrix composites (AMCs), the architecture design of reinforcements is an effective route to obtain superior mechanical performances. In this work, a novel AMC reinforced by CNTs wrapped with γ-A1_2O_3 (CNTs@A1_2O_3) reinforcement with balanced strength and toughness was fabricated by powder metallurgy methods. The wrapping structure of γ-A1_2O_3 was synthesized through the in-situ reactions of Al matrix and boric acid decorated CNTs, thus improving the interface coupling of the composite. The CNTs@A1_2O_3/Al composite with the addition of 0.5 wt% CNTs and 10 wt% in-situ A1_2O_3 exhibited a mean ultimate tensile strength of 404 MPa, which is significantly higher than unreinforced pure Al (183 MPa) and those reinforced by individual CNTs (207 MPa) or A1_2O_3 (289 MPa). An improvement of ductility was also achieved in CNTs@A1_2O_3/Al composites compared with the A1_2O_3/AI composites with the same A1_2O_3 content. The synergistic strengthening and toughening effects are ascribed to the ingenious in-situ CNTs@A1_2O_3 wrapped structure, which highlights the importance of architecture design of reinforcements in AMCs, and sheds new light on the development of CNT-reinforced AMCs.
机译：对于纳米碳增强铝基基复合材料（AMCS），增强件的架构设计是获得优越机械性能的有效途径。在这项工作中，通过粉末冶金方法制造了用γ-A1_2O_3（CNT @ A1_2O_3）加固的CNT加固的一种新型AMC，通过粉末冶金方法制造了平衡强度和韧性。通过Al基质和硼酸装饰CNT的原位反应合成γ-A1_2O_3的包裹结构，从而改善了复合材料的界面耦合。加入0.5wt％CNT和10wt％原位A1_2O_3的CNTs @ A1_2O_3 / Al复合材料表现出404MPa的平均抗拉强度，其显着高于未原始的纯Al（183MPa）和单个加强的那些CNT（207MPa）或A1_2O_3（289 MPa）。与具有相同A1_2O_3含量的A1_2O_3 / AI复合材料相比，CNTS @ A1_2O_3 / Al复合材料中还达到了延展性的改善。协同强化和增韧效果归因于巧妙的原位CNTS @ A1_2O_3包装结构，这突出了建筑设计在AMCS中的钢筋的重要性，并阐述了CNT加固了AMC的开发。

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  • 来源
    《Materials Science and Engineering》 |2020年第21期|140058.1-140058.13|共13页
  • 作者

    Yongchao Shan; Bowen Pu; Enzuo Liu; Chunsheng Shi; Chunnian He; Naiqin Zhao;

  • 作者单位

    School of Materials Science and Engineering and Tianjin Key Laboratory of Composites and Functional Materials Tianjin University 300350 Tianjin PR China;

    School of Materials Science and Engineering and Tianjin Key Laboratory of Composites and Functional Materials Tianjin University 300350 Tianjin PR China;

    School of Materials Science and Engineering and Tianjin Key Laboratory of Composites and Functional Materials Tianjin University 300350 Tianjin PR China Collaborative Innovation Center of Chemical Science and Engineering 300072 Tianjin PR China;

    School of Materials Science and Engineering and Tianjin Key Laboratory of Composites and Functional Materials Tianjin University 300350 Tianjin PR China;

    School of Materials Science and Engineering and Tianjin Key Laboratory of Composites and Functional Materials Tianjin University 300350 Tianjin PR China Collaborative Innovation Center of Chemical Science and Engineering 300072 Tianjin PR China;

    School of Materials Science and Engineering and Tianjin Key Laboratory of Composites and Functional Materials Tianjin University 300350 Tianjin PR China Collaborative Innovation Center of Chemical Science and Engineering 300072 Tianjin PR China;

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  • 正文语种 eng
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  • 关键词

    Metal-matrix composites (MMCs); Carbon nanotube; Mechanical properties;

    机译：金属 - 矩阵复合材料（MMC）;碳纳米管;机械性能;

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