Does the Branly effect occur in spark plasma sintering?

Pierre Guyot (1, 2) , Vincent Rat (2) , J.P. Coudert (2) , F. Jay (1) , Alexandre Maitre (1) , Nicolas Pradeilles (1)

1 SPCTS-AXE1 - Axe 1 : procédés céramiques
2 Axe 2 : procédés de traitements de surface

Spark plasma sintering (SPS) is a non-conventional method of powder consolidation. We show that the Branly effect can occur in SPS of copper powder in the early stages of the process due to inductive effects generated by the applied pulsed current. It leads to the formation of melting zones between contact areas of copper grains which can enhance material densification.

Domaines: Matériaux

Pierre Guyot, Vincent Rat, J.P. Coudert, F. Jay, Alexandre Maitre, et al.. Does the Branly effect occur in spark plasma sintering?. Journal of Physics D: Applied Physics, 2012, 45, pp.092001-1-092001-4. ⟨10.1088/0022-3727/45/9/092001⟩. ⟨hal-00674920⟩