A sacrificial material approach for spark plasma sintering of complex shapes

Abstract : An optimized process for the densification of a complex shape part is studied. Production of samples with a complex shape is very difficult in uniaxial die compaction processes because of the thickness differences responsible for densification inhomogeneities. To solve this problem in the case of a particular shape, we propose a solution consisting of homogenization of the shrinkage distances by means of the use of a sacrificial material. This solution was first studied by a finite element approach and then tested experimentally. We obtained a part of complex shape with an overall relative density of 99% and a homogeneous microstructure.
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Charles Manière, Lise Durand, Alicia Weibel, Geoffroy Chevallier, Claude Estournès. A sacrificial material approach for spark plasma sintering of complex shapes. Scripta Materialia, Elsevier, 2016, vol. 124, pp. 126-128. ⟨10.1016/j.scriptamat.2016.07.006⟩. ⟨hal-01449277⟩

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