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Structural and mechanical characterization of porous iron aluminide FeAl obtained by pressureless Spark Plasma Sintering

机译：无压放电等离子烧结获得的多孔铝化铁FeAl的结构和力学性能

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摘要

In this article, structural and mechanical characterization of porous iron aluminide FeAl with a high open porosity obtained by one-step fast synthesis is presented. FeAl compacts produced by pressureless Spark Plasma Sintering of the Fe-40at%Al powder mixtures at 800 and 900 °C for 3 min had open porosities of 41% and 46%, respectively. An important result of this work is high values of the open porosity of the synthesized FeAl achieved without any pore forming additives by inducing a rapid chemical reaction between iron and aluminum in an electric current-assisted sintering process. Transverse rupture strength (TRS) of the porous FeAl was determined from the experiments on indentation of a steel ball into the disk-shaped sintered specimens. Finite element modeling of the specimen rupture during indentation was carried out in ANSYS 17.0 software. The TRS values of the FeAl compacts obtained analytically were close to those obtained numerically. The TRS of the porous FeAl sintered at 700-900 'C ranged between 53 and 72 MPa and did not change significantly with the sintering temperature.
机译：本文介绍了通过一步快速合成获得的具有高开孔率的多孔铝化铁FeAl的结构和力学特性。通过对Fe-40at％Al粉末混合物在800和900°C下进行3分钟的无压火花等离子体烧结生产的FeAl压块分别具有41％和46％的开孔率。这项工作的重要结果是，通过在电流辅助的烧结过程中引起铁和铝之间的快速化学反应，在没有任何成孔添加剂的情况下，合成的FeAl的开孔孔隙率很高。通过将钢球压入盘状烧结样品中的实验确定了多孔FeAl的横向断裂强度（TRS）。在ANSYS 17.0软件中对压痕过程中试样断裂的有限元建模。通过分析获得的FeAl压块的TRS值接近于通过数值获得的值。在700-900'C烧结的多孔FeAl的TRS介于53和72 MPa之间，并且不会随烧结温度发生明显变化。

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  • 来源
    《Materials Science and Engineering》 |2017年第may17期|309-314|共6页
  • 作者

    Dina V. Dudina; Mikhail A. Legan; Natalia V. Fedorova; Aleksey N. Novoselov; Alexander G. Anisimov; Maksim A. Esikov;

  • 作者单位

    Lavrentyev Institute of Hydrodynamics SB RAS, Lavrentyev Ave. 15, Novosibirsk 630090, Russia ,Novosibirsk State Technical University, Marx Ave. 20, Novosibirsk 630073, Russia ,Institute of Solid State Chemistry and Mechanochemistry SB RAS, Kutateladze str. 18, Novosibirsk 630128, Russia;

    Lavrentyev Institute of Hydrodynamics SB RAS, Lavrentyev Ave. 15, Novosibirsk 630090, Russia ,Novosibirsk State Technical University, Marx Ave. 20, Novosibirsk 630073, Russia;

    Lavrentyev Institute of Hydrodynamics SB RAS, Lavrentyev Ave. 15, Novosibirsk 630090, Russia;

    Institute of Solid State Chemistry and Mechanochemistry SB RAS, Kutateladze str. 18, Novosibirsk 630128, Russia;

    Lavrentyev Institute of Hydrodynamics SB RAS, Lavrentyev Ave. 15, Novosibirsk 630090, Russia;

    Lavrentyev Institute of Hydrodynamics SB RAS, Lavrentyev Ave. 15, Novosibirsk 630090, Russia ,Novosibirsk State Technical University, Marx Ave. 20, Novosibirsk 630073, Russia;

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

    A. Finite element method; A. Electron microscopy; B. Intermetallics; C. Sintering;

    机译：A.有限元法;A.电子显微镜;B.金属间化合物;C.烧结;

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