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Consolidation by spark plasma sintering (SPS) of polyetheretherketone

机译：通过火花血浆烧结（SPS）的聚醚醚酮烧结

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The present study deals with the consolidation of an ultra-high performance polymer, the poly(ether ether ketone) (PEEK), for structural applications, using the powder metallurgy (PM) way, and more precisely the Spark Plasma Sintering (SPS) processing. The effects of SPS parameters such as temperature, pressure, and dwell time on density and mechanical properties of PEEK were investigated via a Design of Experiments (DoE). A temperature of 250 degrees C, a pressure of 40 MPa, and a dwell time of 20 min have been identified as the optimal SPS process parameters. In these conditions, a density of 1.31 g/cm(3) was reached and homogeneous mechanical properties in the volume determined by means of compression tests were found with a compressive modulus of 2.75 GPa, a yield strength of 134 MPa, and a maximum compressive strain of 43%. These results are better than those of commercial products obtained by injection molding. The pressure appears to be a significant parameter on PEEK properties and plays positive or negative roles according to the responses of DoE studied. To our knowledge, it is one of the first studies based on the application of the PM techniques for PEEK consolidation showing the possibility to process below its melting point. (c) 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017, 134, 44911.
机译：本研究涉及使用粉末冶金（PM）方式的结构应用的超高性能聚合物，聚（醚醚酮）（PEEK），更精确地进行火花等离子体烧结（SPS）加工。通过实验设计研究了SPS参数如温度，压力和停留时间对PEEK密度和机械性能的影响，并通过实验（DOE）。已经确定了250℃，压力为40mPa的温度和20分钟的停留时间作为最佳的SPS工艺参数。在这些条件下，达到了1.31g / cm（3）的密度，并在通过压缩模量为2.75GPa的压缩模量，屈服强度为134MPa和最大压缩的压缩模量和最大压缩的体积中达到1.31g / cm（3）的均匀机械性能。应变为43％。这些结果优于注塑成型而获得的商业产品。压力似乎是PEEK属性的重要参数，并根据DOE研究的响应发挥正面或负面角色。据我们所知，它是基于PM技术的第一次研究之一，该技术用于PEEK合并的方法，显示出在其熔点以下过程的可能性。 （c）2017 Wiley期刊，Inc.J.Phill。聚合物。 SCI。 2017,134,44911。

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