Powder/die friction in the spark plasma sintering process: Modelling and experimental identification

Charles Manière (1, 2) , Lise Durand (2) , Claude Estournès (1)

1 CIRIMAT - Centre interuniversitaire de recherche et d'ingenierie des matériaux
2 CEMES - Centre d'élaboration de matériaux et d'études structurales

The powder/die friction phenomenon is known to generate densification inhomogeneities in the spark plasma sintered sample. The measurement of a powder/solid friction coefficient at high temperature is very difficult if not impossible by classical means. Then, an experimental/simulation method of identification of the friction coefficient based on the sample displacement field is introduced. This reveals that the friction of contact type powder/wall is low and about 0.1 and the friction type powder/graphite-foil/wall is close to zero. The relative density inhomogeneities are limited to a maximum difference of 3%.

Mots clés: Spark plasma sintering; Creep; Friction; Finite element method

Domaines: Matériaux; Matériaux

Charles Manière, Lise Durand, Claude Estournès. Powder/die friction in the spark plasma sintering process: Modelling and experimental identification. Scripta Materialia, 2016, vol. 116, pp. 139-142. ⟨10.1016/j.scriptamat.2016.01.040⟩. ⟨hal-01486908⟩