应用化学

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细晶金属铝的制备及力学性能

汤华国ab,赵伟a,刘建伟a,赵振业b,马贤锋a*()   

  1. b中国科学院大学 北京 100049
  • 出版日期:2015-08-31 发布日期:2015-08-31

Synthesis and Mechanical Performances of Bulk Ultrafine Aluminum

TANG Huaguoab,ZHAO Weia,LIU Jianweia,ZHAO Zhenyeb,MA Xianfenga*()   

  1. aState Key Laboratory of Rare Earth Resource Utilization,Changchun Institute of Applied Chemistry,Chinese Academy of Sciences,Changchun 130022,China
    bUniversity of Chinese Academy of Sciences,Beijing 100049,China
  • Published:2015-08-31 Online:2015-08-31
  • Contact: MA Xianfeng

摘要:

从99.7%的金属铝粉出发,通过机械球磨制粉及快速压锻烧结技术制备得到了高强金属铝块,拉伸性能测试表明,金属铝的抗拉强度为537 MPa,屈服强度为495 MPa。 电子显微镜分析表明,金属铝具有0.5~5 μm的显微组织。 高强金属铝的主要强化机制是细晶强化。 较低的制备成本适合大规模工业化生产。

关键词: 超细金属铝, 机械球磨, 快速固结, 细晶强化

Abstract:

High strength bulk aluminum has been prepared by mechanical milling and press-forming processes. The bulk aluminum exhibits a high tensile strength of 537 MPa and a yield strength of 495 MPa. Characterization of microstructures reveals that the grain size of the bulk aluminum is between 0.5~5 μm. The high strength of pure aluminum is benefit from the fine grain size. The low fabrication cost with mechanical milling and press-forming is suitable for industrialized production.

Key words: bulk ultrafine aluminum, mechanical milling, rapid solidification, grain refinement