Sintering behavior and microstructural evolution of NbC-Ni cemented carbides with Mo2C additions

Autor: Sabine Lay, Mathilde Labonne, Luis Fernando García, Olivier Lavigne, Jean-Michel Missiaen, Elena Tarrés, Nerea García
Přispěvatelé: Science et Ingénierie des Matériaux et Procédés (SIMaP), Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP ), Université Grenoble Alpes (UGA)
Jazyk: angličtina
Rok vydání: 2020
Předmět:
Zdroj: International Journal of Refractory Metals and Hard Materials
International Journal of Refractory Metals and Hard Materials, Elsevier, 2020, 92, pp.105295. ⟨10.1016/j.ijrmhm.2020.105295⟩
ISSN: 0263-4368
DOI: 10.1016/j.ijrmhm.2020.105295⟩
Popis: International audience; The effect of Mo2C additions to a NbC-12vol%Ni-0.5vol%WC material on sintering at 1450 °C and on the resulting microstructure was investigated by replacing different amounts of NbC with Mo2C (0%, 3%, 6% or 9% in volume) and by performing interrupted tests at key temperatures (1080 °C, 1180 °C and 1320 °C). Chemical reactions and phase transformations were followed by Thermogravimetric Analysis (TGA) and sintering behavior by dilatometry. The microstructure was studied by Scanning and Transmission Electron Microscopy (SEM and TEM), Energy Dispersive Spectrometry (EDS) and X-ray diffraction (XRD). It is observed that Mo2C and WC particles, present at the onset of solid state sintering, delay the shrinkage of the material. An increase of hardness with Mo2C addition is measured, mainly due to grain refinement.
Databáze: OpenAIRE
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