Centro de Tecnologia
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Article Mechanisms of high-entropy carbide formation (TiVTaNbW)C via high-energy milling: structural, chemical, and spectroscopic analysis(Materials Science and Engineering B-Advanced Functional Solid-State Materials, 2026-01) Nascimento, Rubens Maribondo do; Marques, Anderson Costa; Silva, Thalita Queiroz e; Vieira, Pâmala Samara; Paula, Celmo Hudson Reis; Lima, Maria José Santos; Filgueira, Marcello; Gomes, Uilame Umbelino; Mashhadikarimi, Meysam; https://orcid.org/0000-0002-4074-0762; https://orcid.org/0000-0001-9094-0044; https://orcid.org/0000-0002-8846-658X; https://orcid.org/0009-0009-6365-2691; https://orcid.org/0000-0001-9918-7087; https://orcid.org/0000-0001-8957-9204; https://orcid.org/0000-0001-5297-0250; https://orcid.org/0000-0003-1449-3654Article Effect of carbon content on the microstructure and properties of NbC-Fe cermets(International Journal of Refractory Metals & Hard Materials, 2025-04) Nascimento, Rubens Maribondo do; Paula, Celmo Hudson Reis de; Anwer, Zahid; Huang, Shuigen; Vleugels, Jef; Mashhadikarimi, Meysam; https://orcid.org/0000-0001-9094-0044; https://orcid.org/0000-0001-9918-7087; https://orcid.org/0000-0002-1522-8257; https://orcid.org/0000-0002-9401-6921; https://orcid.org/0000-0003-1449-3654Article NiO-CGO Composite for SOFC Anode: Synthesis and Characterization(Journal of Materials Science and Engineering, 2010) Cela, Beatriz; Macedo, Daniel Araújo de; Souza, Graziele Lopes de; Miranda, Auristela Carla de; Martinelli, Antonio Eduardo; Nascimento, Rubens Maribondo do; Paskocimas, Carlos AlbertoArticle Analysis of the Deformation of Composite Materials of Scrapes of Tire and Latex with Temperature Variation(David Publishing, 2012) Ford, Elmo Thiago Lins Cöuras; Nascimento, Rubens Maribondo do; Mendes, José Ubiragi de Lima; Marques, Antonio Torres; Pereira, Celeste Margarida CorreiaArticle One-step synthesis of composite electrolytes of Eu-doped ceria and alkali metal carbonates(Elsevier, 2013-12-13) Nascimento, Rubens Maribondo do; Rajesh, Surendran; Macedo, Daniel Araújo de; Souza, Graziele Lopes de; Figueiredo, Filipe Miguel Henriques Lebre Ramos; Marques, Fernando M. B.Article Electrical conductivity and microstructure of NiO-CGO composites prepared by one-step synthesis(IOP Publishing, 2013-04-01) Nascimento, Rubens Maribondo do; Macedo, Daniel Araújo de; Figueiredo, Filipe Miguel Lebre; Patrício, Sónia Gonçalves; Martinelli, Antonio Eduardo; Paskocimas, Carlos Alberto; Marques, Fernando Manuel BicoThe correlation between the microstructure and electrical properties of NiO-Ce0.9Gd0.1O1.95 (NiO-CGO) composites prepared by a one-step synthesis method is reported in the present work, and compared to conventional samples synthesized by mechanically mixing commercial powders. Samples sintered between 1350 and 1450 °C had their microstructures and electrical properties investigated by scanning electron microscopy (SEM) and impedance spectroscopy. The total electrical conductivity in the range of 100 – 500 °C of one-step composites is more than one order of magnitude higher than for conventional material. This result is associated to the presence of a network of well-connected and homogeneously distributed NiO grains shown by SEM for the one-step composite, which is responsible for its improved percolative behavior and lower activation energy (0.24 eV at 250 – 650 °C).Article Citrate–hydrothermal synthesis, structure and electrochemical performance of La0.6Sr0.4Co0.2Fe0.8O3−δ cathodes for IT-SOFCs(Elsevier, 2013) Garcia, Laurênia Martins Pereira; Macedo, Daniel Araújo de; Souza, Graziele L.; Motta, Fabiana Villela da; Paskocimas, Carlos Alberto; Nascimento, Rubens Maribondo doArticle Tribological behaviour of glass-ceramics reinforced by Yttria Stabilized Zirconia(Elsevier, 2016) Santos, Rafaela Luiz Pereira; Buciumeanu, Mihaela; Silva, Filipe Samuel; Souza, Júlio César Matias de; Nascimento, Rubens Maribondo do; Motta, Fabiana Villela da; Carvalho, Oscar; Henriques, BrunoArticle On the mechanical properties and microstructure of zirconia-reinforced feldspar-based porcelain(Elsevier, 2016-09) Nascimento, Rubens Maribondo do; Santos, Rafaela Luiz Pereira; Silva, Filipe Samuel; Motta, Fabiana Villela da; Henriques, Bruno; Souza, Júlio César Matias deArticle Effect of laser surface texturing on primary stability and surface properties of zirconia implants(Elsevier, 2017-12-01) Nascimento, Rubens Maribondo do; Moura, Filipe Samuel; Pereira, Rafael Santiago Floriani; Buciumeanu, Mihaela; Carvalho, Oscar; Bartolomeu, Flávio; Silva, Filipe Samuel