Spark Plasma Sintering Behavior of Pure Aluminum Depending on Various Sintering Temperatures
Spark Plasma Sintering Behavior of Pure Aluminum Depending on Various Sintering Temperatures
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DOI：
10.1007/s12540-010-0071-2
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发表时间：
2010-02-01
影响因子：
3.5
通讯作者：
Park, Yongho
中科院分区：
文献类型：
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作者：
Kwon, Hansang;Park, Dae Hoon;Park, Yongho
我们通过放电等离子烧结（SPS）工艺成功制造了高密度纯铝（Al）块体。随着SPS工艺烧结温度的升高，Al的相对密度增加。在纯铝粉末的 SPS 过程中，铝颗粒表面的铝氧化层被微等离子体和施加的压力部分破坏。通过光学显微镜、场发射扫描电子显微镜和高分辨率透射电子显微镜观察了在不同温度下获得的火花等离子体烧结体的微观结构。我们认为，尽管烧结温度升高，钉扎效应、快速加热循环和施加的压力在抑制颗粒生长方面发挥了重要作用。所采用的 SPS 工艺对于实现完全致密化的铝坯体非常有用，这是可行的。
We have successfully fabricated high-density pure aluminum (Al) bulk by means of a spark-plasma-sintering (SPS) process. The relative density of Al was enhanced as the sintering temperature of the SPS process increased. During the SPS process for pure Al power, the Al oxide layer on the surface of the Al particle was partially broken by the microplasma and applied pressure. The microstructures of the spark-plasma-sintered compacts obtained at various temperatures were observed by optical microscopy, field-emission scanning electron microscopy, and high-resolution transmission electron microscopy. We believe that the pinning effect, rapid heating cycle, and applied pressure played an important role in restraining the particle growth despite the increase in sintering temperature. It is feasible that the employed SPS process could be very useful to achieve fully densified Al compact.