Spark plasma sintering and complex shapes: The deformed interfaces approach
Spark plasma sintering and complex shapes: The deformed interfaces approach
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DOI：
10.1016/j.powtec.2017.07.048
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发表时间：
2017-10-01
影响因子：
5.2
通讯作者：
Estournes, Claude
中科院分区：
文献类型：
--
作者：
Maniere, Charles;Nigito, Emmanuel;Estournes, Claude
在过去的几十年里，SPS技术已经证明了其在微观结构控制、缩短循环时间和结果的总体稳定性方面的优势。然而，要克服基础研究和成功产业化之间的所谓“死亡之谷”，下一步是要证明这项技术对高度复杂形状的样品进行完全致密化的能力。由于样品厚度的不同，模压成型过程中复杂形状的精加工通常会出现致密化不均匀的情况。在本文中，我们提出了一种解决这个问题的方法，我们称之为“变形界面法”，它使用了牺牲材料。这种方法可以推广到所有的压力辅助烧结技术，并允许完全致密化，无论零件的形状复杂程度如何。用不同的材料(Al、CoNiCrAlY、PMMA、Al_2O_3、4Y-ZrO_2)和不同的形状对该方法进行了测试。为了验证该方法在非常复杂形状上的有效性，制作了密度为98%的涡轮叶片形状。(C)2017爱思唯尔B.V.保留所有权利。
Over the last few decades, the SPS technique has proven its benefits in terms of microstructure control, reduction of cycling time and a general stability of the results. However, to overcome the so-called "valley of death" between fundamental research and successful industrialization, the next step is to prove the ability of this technology to perform the total densification of highly complex shape samples. The elaboration of complex shapes with die compaction processes often present densification inhomogeneity because of the thickness differences of the sample. In this paper, we present a method to solve this problem with an approach we called the "deformed interfaces method" that uses sacrificial materials. This method can be generalized to all the pressure assisted sintering techniques and allow a complete densification whatever the shape complexity of the part. This method is tested with different materials (Al, CoNiCrA1Y, PMMA, Al2O3, 4Y-ZrO2) and shapes. To prove the effectiveness of this method on very high complex shapes, a 98% dense turbine blade shape has been made. (C) 2017 Elsevier B.V. All rights reserved.