Nano-Al2O3 Particle Incorporated in Al Matrix Composite by Vortex-Free High-Speed Stir Casting

IF 2.6 3区 材料科学 Q2 METALLURGY & METALLURGICAL ENGINEERING
Yinan Lu, Yunhui Du, Weiyi Zhang, Hongzhen Tan, Nan Zhang, Yi Luo, Peng Zhang
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Abstract

Vortex-free high-speed stir casting (VFHSC) methodology can achieve uniform dispersion of particles in melt without air entrapment for fabricating particle reinforced composites, and it has been proved to be feasible for preparing micron-composites by this methodology. In this work, in order to study deeply on particles in nano-size magnitude in composites by this methodology, the preparation of 1.5 vol.% Nano-Al2O3p/Al–Cu–Mg–Si composite is also investigated. The proper stirring parameters for ideal particle dispersion are determined to prepare the materials. Porosity of the composite can be limited to 0.147 % under the VFHSC methodology. The composition and microstructure of ingots, including the incorporation of Al2O3 particles as well as the morphology of precipitated phases, are examined by OM, XRD, SEM, TEM, HRTEM and EDS. The nano-particles are incorporated ideally in the matrix with restricted aggregation and sedimentation, and the well-bounded Al2O3–Al interface possesses semi-coherent interface. Moreover, the VFHSC 1.5 vol.% Nano-Al2O3p/Al–Cu–Mg–Si composite exhibits obvious strengthening, limited ductility reduction, higher hardness as well as better wear resistance than those of matrix, validating the efficacy of the VFHSC methodology on fabricating 1.5 vol.% Nano-Al2O3p/Al–Cu–Mg–Si composite. The work proves that incorporating nano-particles in Al matrix by VFHSC methodology is feasible and efficient. The work presented in this paper proposes a viable approach for the fabrication of nanocomposites using the stir casting method, thereby offering valuable insights for further research on stir casting technology.

Abstract Image

通过无涡流高速搅拌铸造在铝基复合材料中加入纳米 Al2O3 粒子
无涡流高速搅拌铸造(VFHSC)方法可实现颗粒在熔体中的均匀分散,不会夹带空气,用于制造颗粒增强复合材料,而且该方法已被证明可用于制备微米复合材料。在本研究中,为了深入研究该方法在复合材料中的纳米级颗粒,还研究了 1.5 vol.% 纳米 Al2O3p/Al-Cu-Mg-Si 复合材料的制备。在制备材料时,确定了理想颗粒分散的适当搅拌参数。在 VFHSC 方法下,复合材料的孔隙率可限制在 0.147%。通过 OM、XRD、SEM、TEM、HRTEM 和 EDS 检查了铸锭的成分和微观结构,包括 Al2O3 颗粒的加入以及沉淀相的形态。纳米颗粒在基体中的结合非常理想,聚集和沉积受到限制,Al2O3-Al 界面具有良好的半相干界面。此外,与基体相比,VFHSC 1.5 Vol.% 纳米 Al2O3p/Al-Cu-Mg-Si 复合材料表现出明显的增强性、有限的延展性降低、更高的硬度和更好的耐磨性,验证了 VFHSC 方法在制造 1.5 Vol.% 纳米 Al2O3p/Al-Cu-Mg-Si 复合材料上的有效性。这项工作证明,通过 VFHSC 方法在铝基体中加入纳米颗粒是可行且高效的。本文介绍的工作为利用搅拌铸造法制造纳米复合材料提出了一种可行的方法,从而为进一步研究搅拌铸造技术提供了宝贵的见解。
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来源期刊
International Journal of Metalcasting
International Journal of Metalcasting 工程技术-冶金工程
CiteScore
4.20
自引率
42.30%
发文量
174
审稿时长
>12 weeks
期刊介绍: The International Journal of Metalcasting is dedicated to leading the transfer of research and technology for the global metalcasting industry. The quarterly publication keeps the latest developments in metalcasting research and technology in front of the scientific leaders in our global industry throughout the year. All papers published in the the journal are approved after a rigorous peer review process. The editorial peer review board represents three international metalcasting groups: academia (metalcasting professors), science and research (personnel from national labs, research and scientific institutions), and industry (leading technical personnel from metalcasting facilities).
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