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首页> 外文期刊>Materials Science and Engineering >Grain growth and sintering characteristics of Ni-Cu alloy nanopowders consolidated by the spark plasma sintering method
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Grain growth and sintering characteristics of Ni-Cu alloy nanopowders consolidated by the spark plasma sintering method

机译：火花等离子体烧结法固结的Ni-Cu合金纳米粉的晶粒长大和烧结特性

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摘要

Ni-Cu bulk alloys are successfully prepared by the spark plasma sintering (SPS) technique using nanopowders obtained from the arc plasma evaporation method. The grain growth of Ni-Cu nanopowders during the SPS process is studied based on the classical phenomenological kinetic theory. The kinetic grain growth exponent, n, and the apparent activation energy, Q, are determined using the plot method. The calculation results exhibit that the n values vary at different sintering temperatures, whereas the Q values at low temperature are always higher than at high temperature regardless of the n values. The mechanical properties such as yield strength, tensile strength and ductility of the sintered specimens at different temperatures and raw alloy ingots are studied by tensile test. The density of the sintered samples increases with increasing sintering temperature, in contrast to the behavior of the tensile strength and yield strength of the Ni-Cu bulk alloy sintered by SPS at different temperatures. The mechanism strength of the sintered specimens is attributed to the microstructure characteristics of the specimens at different temperatures, which is further discussed with the classical reinforcement theories.
机译：Ni-Cu块状合金是通过火花等离子体烧结（SPS）技术成功地使用从电弧等离子体蒸发方法获得的纳米粉体制备的。基于经典现象动力学理论，研究了SPS过程中Ni-Cu纳米粉体的晶粒长大。使用绘图方法确定了动态晶粒生长指数n和表观活化能Q。计算结果表明，n值在不同的烧结温度下会发生变化，而无论n值如何，低温下的Q值始终高于高温下的Q值。通过拉伸试验研究了在不同温度下烧结试样的力学性能，如屈服强度，抗拉强度和延展性，以及生合金锭。与在不同温度下用SPS烧结的Ni-Cu块状合金的拉伸强度和屈服强度的行为相反，烧结样品的密度随烧结温度的升高而增加。烧结试样的机械强度归因于试样在不同温度下的微观结构特征，这在经典的补强理论中得到了进一步的讨论。

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  • 来源
    《Materials Science and Engineering》 |2012年第15期|p.219-223|共5页
  • 作者

    A.J. Song; M.Z. Ma; R.Z. Zhou; L. Wang; W.G. Zhang; C.L. Tan; R.P. Liu;

  • 作者单位

    State Key Laboratory of Metastable Materials Science and Technology, Yanshan University, Qinhuangdao 066004, PR China Physical-Chemistry College, Hebei Normal University of Science and Technology, Qinhuangdao 066004, PR China;

    State Key Laboratory of Metastable Materials Science and Technology, Yanshan University, Qinhuangdao 066004, PR China;

    State Key Laboratory of Metastable Materials Science and Technology, Yanshan University, Qinhuangdao 066004, PR China;

    State Key Laboratory of Metastable Materials Science and Technology, Yanshan University, Qinhuangdao 066004, PR China;

    State Key Laboratory of Metastable Materials Science and Technology, Yanshan University, Qinhuangdao 066004, PR China Physical-Chemistry College, Hebei Normal University of Science and Technology, Qinhuangdao 066004, PR China;

    State Key Laboratory of Metastable Materials Science and Technology, Yanshan University, Qinhuangdao 066004, PR China;

    State Key Laboratory of Metastable Materials Science and Technology, Yanshan University, Qinhuangdao 066004, PR China;

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  • 正文语种 eng
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  • 关键词

    Ni-Cu alloy nanopowder; spark plasma sintering; grain growth; tensile strength;

    机译：镍铜合金纳米粉;火花等离子体烧结;谷物生长抗拉强度;

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