Development of electric resistance sintering process for the fabrication of hard metals: Processing, microstructure and mechanical properties

This work presents the development of the Electrical Resistance Sintering (ERS) process for the fabrication of hard metals. The compositions of the materials produced were WC with 6 and 10 wt% of Co. In addition to the specific characteristics of the technology, the characterization of the produced...

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Veröffentlicht in:International journal of refractory metals & hard materials 2017-08, Vol.66, p.88-94
Hauptverfasser: Lagos, M.A., Agote, I., Schubert, T., Weissgaerber, T., Gallardo, J.M., Montes, J.M., Prakash, L., Andreouli, C., Oikonomou, V., Lopez, D., Calero, J.A.
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container_start_page 88
container_title International journal of refractory metals & hard materials
container_volume 66
creator Lagos, M.A.
Agote, I.
Schubert, T.
Weissgaerber, T.
Gallardo, J.M.
Montes, J.M.
Prakash, L.
Andreouli, C.
Oikonomou, V.
Lopez, D.
Calero, J.A.
description This work presents the development of the Electrical Resistance Sintering (ERS) process for the fabrication of hard metals. The compositions of the materials produced were WC with 6 and 10 wt% of Co. In addition to the specific characteristics of the technology, the characterization of the produced parts is presented and compared to materials obtained by conventional processes. The parts produced by ERS present densities comparable to the ones obtained by conventional methods. The microstructural comparison shows a considerable grain size reduction in the ERS materials which consequently brings a hardness increase. ERS materials show similar fracture toughness to conventional ones. The very fast sintering allows performing the process without any protective atmosphere, therefore making this process very attractive for the production of materials that need to be sintered under non-oxidising environments. The total duration of the cycle, including heating, holding time and cooling is few seconds. Finally, some considerations about the scale up and possible industrialization of the technology are explained.
doi_str_mv 10.1016/j.ijrmhm.2017.03.005
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subjects Cemented carbides
Fracture toughness
Mechanical properties
Metals
Microstructure
Resistance sintering
Sintering
Size reduction
Studies
title Development of electric resistance sintering process for the fabrication of hard metals: Processing, microstructure and mechanical properties
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