| CNTs添加对Cu-Al2O3复合材料耐电弧侵蚀性能的影响 |
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| 引用本文： | 杨豫博,国秀花,宋克兴,李韶林,米绪军,李周. CNTs添加对Cu-Al2O3复合材料耐电弧侵蚀性能的影响[J]. 复合材料学报, 2023, 40(1): 280-289. DOI: 10.13801/j.cnki.fhclxb.20220112.001 |
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| 作者姓名： | 杨豫博 国秀花 宋克兴 李韶林 米绪军 李周 |
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| 作者单位： | 1.河南科技大学 材料科学与工程学院，有色金属共性技术河南省协同创新中心，河南省有色金属材料科学与加工技术重点实验室，洛阳 471023 |
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| 基金项目： | 河南省重点研发与推广专项(212102210110)；河南省高等学校青年骨干教师计划项目(2018GGJS045)；中国工程发展战略河南研究院战略咨询研究项目(2021HENZDA02)；中国博士后科学基金(2020T130172；2020M682288) |
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| 摘 要： | Cu-Al2O3复合材料具有优异的传导性能和力学性能，在耐磨材料领域具有广阔的应用前景。为进一步提升电摩擦条件下复合材料的耐电弧侵蚀性能，本文采用内氧化法与粉末冶金法相结合制备了不同碳纳米管(CNTs)含量的CNTs/Cu-Al2O3复合材料，观察了CNTs/Cu-Al2O3复合材料中增强相的分布及其与基体界面结合情况，研究了添加不同含量CNTs对Cu-Al2O3复合材料传导性能和力学性能的影响，重点探究了CNTs/Cu-Al2O3复合材料的耐电弧侵蚀机制。结果表明：原位生成的纳米Al2O3颗粒钉扎位错及对CNTs分布具有调控作用，使CNTs弥散分布在铜基体中。与Cu-Al2O3复合材料相比，CNTs/Cu-Al2O3复合材料燃弧时间和燃弧能量明显降低，波动更平稳。在电弧侵蚀过程中，...
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| 关 键 词： | 碳纳米管(CNTs) 金属基复合材料 显微结构 电弧侵蚀 稳定熔池 Cu 纳米Al2O3颗粒 |
| 收稿时间： | 2021-12-06 |
Arc erosion resistance of Cu-Al2O3 composite effected by CNTs |
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| Abstract: | Cu-Al2O3 composite has excellent conductivity and mechanical properties, and it widely used in the field of wear-resistant materials. In order to further improve the arc erosion resistance of composite under the condition of electro-friction, CNTs/Cu-Al2O3 composites with different contents of carbon nanotubes (CNTs) were prepared by internal oxidation combining with powder metallurgy. The distribution of reinforcing phase and the interface between CNTs and matrix in CNTs/Cu-Al2O3 composites were observed. The conductivity and mechanical properties of Cu-Al2O3 composites effected by CNTs were studied. The arc erosion resistance mechanism of CNTs/Cu-Al2O3 composites was mainly explored. The results show that in-situ nano-Al2O3 particles pin dislocation, CNTs are dispersed in the copper matrix due to the regulation of CNTs distribution by Al2O3 particles. Compared with Cu-Al2O3 composites, the arc duration and energy of CNTs/Cu-Al2O3 composites are obviously reduced and fluctuate more stable. In the process of arc erosion, CNTs in the molten pool will float to the surface to disperse the arc and reduce the concentrated erosion area. Nano-Al2O3 particles can stabilize the molten pool, reduce the splash of molten droplets and the mass loss of CNTs/Cu-Al2O3 composites. Among them, CNTs/Cu-3.5Al2O3 composites with 1.2vol%CNTs has the lowest and most stable arc duration and energy. This research result provides a favorable theoretical basis for the research of ablation resistant materials. |
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