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Low-temperature spark plasma sintering of NiO nanoparticles

机译：NiO纳米粒子的低温火花等离子体烧结

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摘要

NiO nanoparticles of 20 nm in diameter were spark plasma sintered between 400 °C and 600 °C for 5 and 10min durations. Application of 100MPa pressure from room temperature resulted in densities between 75% and 92%. The final grain size was between 26 nm and 68 nm. Lower densities were recorded when 100MPa was applied at the SPS temperature. Two shrinkage rate maxima of ~3.4 x 10~(-3) s~(-1) and ~2 x 10~(-3) S~(-1) were observed around 390± 10°C and at the SPS temperature. The two shrinkage rate maxima were related to densification by particle sliding followed by diffusional grain boundary sliding during the heating. The strong effects of the surface and interfacial processes which are active during the SPS were highlighted.
机译：将直径为20 nm的NiO纳米粒子在400°C和600°C之间进行5分钟和10分钟的放电等离子体烧结。从室温施加100MPa的压力导致密度介于75％和92％之间。最终晶粒尺寸在26nm至68nm之间。当在SPS温度下施加100MPa时，记录到较低的密度。在390±10°C和SPS温度下观察到两个最大的收缩率〜3.4 x 10〜（-3）s〜（-1）和〜2 x 10〜（-3）S〜（-1）。这两个收缩率最大值与加热过程中的颗粒滑动和随后的扩散晶界滑动引起的致密化有关。强调了SPS期间活跃的表面和界面过程的强大影响。

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  • 来源
    《Materials Science and Engineering》 |2011年第6期|p.2936-2940|共5页
  • 作者

    Rachman Chaim; Ram Reshef; Guanghua Liu; Zhijian Shen;

  • 作者单位

    Department of Materials Engineering, Technion - Israel Institute o/Technology. Haifa 32000, Israel;

    Department of Materials Engineering, Technion - Israel Institute o/Technology. Haifa 32000, Israel;

    Department of Materials and Environmental Chemistry, Arrhenius Laboratory, Stockholm University. S-10691 Stockholm, Sweden;

    Department of Materials and Environmental Chemistry, Arrhenius Laboratory, Stockholm University. S-10691 Stockholm, Sweden;

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    spark plasma sintering; densification; nanocrystalline; particle sliding; NiO;

    机译：火花等离子体烧结;致密化纳米晶粒子滑动氧化镍;

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