Effect of carbon content on the microstructure and properties of NbC-Fe cermets

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dc.contributor.authorNascimento, Rubens Maribondo do
dc.contributor.authorPaula, Celmo Hudson Reis de
dc.contributor.authorAnwer, Zahid
dc.contributor.authorHuang, Shuigen
dc.contributor.authorVleugels, Jef
dc.contributor.authorMashhadikarimi, Meysam
dc.contributor.authorIDhttps://orcid.org/0000-0001-9094-0044
dc.contributor.authorIDhttps://orcid.org/0000-0001-9918-7087
dc.contributor.authorIDhttps://orcid.org/0000-0002-1522-8257
dc.contributor.authorIDhttps://orcid.org/0000-0002-9401-6921
dc.contributor.authorIDhttps://orcid.org/0000-0003-1449-3654
dc.date.accessioned2025-11-06T23:49:10Z
dc.date.available2025-11-06T23:49:10Z
dc.date.issued2025-04
dc.description.resumoThe aim of this work was to correlate the overall carbon content in NbC-Fe starting powders with the resulting microstructure, hardness and fracture toughness of Fe-bonded NbC cermets prepared by conventional liquid phase sintering for 1 h at 1400 °C in vacuum. The microstructure, phase composition and thermal behavior were analysed by scanning electron microscopy, X-ray diffraction, thermogravimetric analysis, and differential scanning calorimetry, and the Vickers hardness and Palmqvist fracture toughness were measured. The influence of the carbon content on the sinterability, carbide grain size, morphology, and cermet mechanical properties were elucidated. A lower carbon content resulted in the aggregation of NbC grains and an increased mass transfer rate, resulting in coarser NbC grains. With an increase in carbon content in the system, the carbothermal reduction of surface oxides occurred at lower temperatures, resulting in better sinterability, improved binder distribution and a refined microstructure with superior mechanical properties compared to lower carbon content cermets
dc.identifier.citationPAULA, Celmo Hudson Reis de; ANWER, Zahid; HUANG, Shuigen; VLEUGELS, Jef; MASHHADIKARIMI, Meysam; NASCIMENTO, Rubens Maribondo do. Effect of carbon content on the microstructure and properties of NbC-Fe cermets. International Journal of Refractory Metals & Hard Materials, v. 128, p. 107026, abr. 2025. DOI: https://doi.org/10.1016/j.ijrmhm.2024.107026. Disponível em: https://www.sciencedirect.com/science/article/abs/pii/S0263436824004748?via%3Dihub. Acesso em: 15 out. 2025.
dc.identifier.doihttps://doi.org/10.1016/j.ijrmhm.2024.107026
dc.identifier.urihttps://repositorio.ufrn.br/handle/123456789/66082
dc.language.isoen
dc.publisherInternational Journal of Refractory Metals & Hard Materials
dc.subjectNiobium carbide
dc.subjectCermet
dc.subjectIron
dc.subjectLiquid phase sintering
dc.subjectCarbon
dc.titleEffect of carbon content on the microstructure and properties of NbC-Fe cermets
dc.typearticle

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