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Effect of Nd content on microstructure and mechanical properties of Gr_f/Al composite

机译:钕含量对Gr_f / Al复合材料组织和力学性能的影响

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摘要

M40 graphite fibre reinforced Al-17Mg matrix composites with different neodymium (Nd) content (Al-17Mg, Al-17Mg-0.2Nd, Al-17Mg-0.5Nd and Al-17Mg-2Nd) were fabricated by pressure infiltration method. Microstructure of Gr_f/Al composites was investigated by XRD, SEM, TEM and HRTEM. Effect of Nd on microstructure and mechanical properties of Grf/Al composites were deeply discussed. AbMg_2 and Al_(11)Nd_3 phases followed by segregation of Nd and Mg at carbon-aluminum interface were detected in composites containing Nd. The size and amount of Al_4C_3 phase were increased with Nd content. Bending strength of Gr_f/Al composites were decreased sharply from 1463 MPa (Gr_f/Al-17Mg) to 791 MPa (Gr_f/Al-17Mg-2Nd) after the addition of Nd. The increased Nd content decreased the pull-out of single fibre and bundles, which was due to the high interfacial bonding strength with formation of Al_4C_3, Al_3Mg_2, Al_(11) Nd_3 phases and the transition layer.
机译:采用压力浸渗法制备了不同钕含量的M40石墨纤维增强Al-17Mg基复合材料(Al-17Mg,Al-17Mg-0.2Nd,Al-17Mg-0.5Nd和Al-17Mg-2Nd)。用XRD,SEM,TEM和HRTEM研究了Gr_f / Al复合材料的显微组织。深入讨论了钕对Grf / Al复合材料组织和力学性能的影响。在含Nd的复合材料中检测到AbMg_2和Al_(11)Nd_3相,然后在碳铝界面上分离Nd和Mg。 Al_4C_3相的尺寸和数量随Nd含量的增加而增加。添加Nd后,Gr_f / Al复合材料的弯曲强度从1463 MPa(Gr_f / Al-17Mg)急剧下降至791 MPa(Gr_f / Al-17Mg-2Nd)。 Nd含量的增加减少了单纤维和纤维束的拉出,这是由于高的界面结合强度,形成了Al_4C_3,Al_3Mg_2,Al_(11)Nd_3相和过渡层。

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  • 来源
    《Materials Science and Engineering》 |2011年第28期|p.8212-8217|共6页
  • 作者单位

    No. 1, West Dandong Road, School of Mechanical Engineering, Liaoning Shihua University, Fushun 113001, PR China,School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, PR China;

    School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, PR China;

    School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, PR China,Department of Materials Science and Chemical Engineering, Politecnico di Torino, Corso Duca degli Abruzzi 24, 10129 Torino, Italy;

    Department of Materials Science and Chemical Engineering, Politecnico di Torino, Corso Duca degli Abruzzi 24, 10129 Torino, Italy;

    School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, PR China;

    School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, PR China;

    School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, PR China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    composite; electron microscopy; interface; failure;

    机译:综合;电子显微镜;接口;失败;

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