Joule heating as a primary heating source mechanism was probed during spark plasma sintering (SPS) of pure metal powders (Fe, Ni and Cu). Resistance to electric path was estimated from voltage-current measurements obtained online during these experiments. Resistance was observed to saturate at the same value irrespective of the type of metal powder, after attaining a sintering temperature of ∼0.3Tm. This saturation in resistance is attributed primarily to the Joule heating that occurs at the graphite-foil and punch in an SPS system. © 2014 Acta Materialia Inc. All rights reserved.

Budaraju Srinivasa Murty

Department of Materials Science and Metallurgical Engineering

N. Chawake

L.D. Pinto

A.K. Srivastav

K. Akkiraju

R.S. Kottada

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Scripta Materialia

On Joule heating during spark plasma sintering of metal powders

Journal	Data powered by TypesetScripta Materialia
Publisher	Data powered by TypesetElsevier Ltd
ISSN	13596462