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Article Dans Une Revue Metallurgical and Materials Transactions A Année : 2011

A Phenomenological Analysis of Sintering Mechanisms of W-Cu from the Effect of Copper Content on Densification Kinetics

Résumé

The effect of addition of copper on the sintering of a W powder was systematically investigated by the analysis of dilatometric experiments on W and W-Cu compacts prepared with submicrometric powders. A pure W powder compact and a W-10 wt pct Cu powder compact with the same packing fraction of W particles were first studied, in order to analyze the effect of copper at fixed microstructure of the solid W particle packing. A more systematic set of experiments with different copper contents and W particle sizes was also qualitatively analyzed. A phenomenological model of sintering was developed and fitted in order to extrapolate the effect of copper content on sintering kinetics at fixed microstructure of the W particle skeleton. An interpretation of the sintering mechanisms was then proposed. Sintering of a W-Cu powder compact is the result of solid-state sintering of the W skeleton, enhanced by the capillary forces exerted by copper, with the superimposition of a particle rearrangement step after copper melting

Domaines

Matériaux

Dates et versions

hal-00640159 , version 1 (10-11-2011)

Identifiants

Citer

J.J. Raharijaona, J.M. Missiaen, D. Bouvard. A Phenomenological Analysis of Sintering Mechanisms of W-Cu from the Effect of Copper Content on Densification Kinetics. Metallurgical and Materials Transactions A, 2011, 42A (8), pp.2411-2419. ⟨10.1007/s11661-011-0615-1⟩. ⟨hal-00640159⟩
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