106597 20240104111815.0 doi 10.1016/j.jeurceramsoc.2020.08.024 sideral 119627 ART-2021-119627 eng Amaveda, H. Universidad de Zaragoza (orcid)0000-0003-2212-447X Drastic enhancement of mechanical properties of Ca3Co4O9 by B4C addition 2021 Access copy available to the general public Unrestricted Ca3Co4O9 with B4C additions in different proportions (0, 0.10, 0.25, 0.5, and 0.75 wt.%) have been fabricated using the classical solid-state method. Powder XRD patterns have displayed that Ca3Co4O9 phase is the major one in all samples. Microstructural observations showed that B4C has been superficially oxidized, producing liquid B2O3 during sintering, and reacting with the Ca3Co4O9 grains to produce bridges between them. In spite of the increase of porosity, these bridges led to an important raise (more than two times) of mechanical properties when compared to the pristine materials. On the other hand, while B4C addition has not influenced S values, it has decreased electrical resistivity, thermal conductivity, and thermal expansion. Consequently, ZT values have been also increased, reaching 0.24 at 800 °C in 0.25 wt.% B4C containing samples, which is very close to the best values reported in the literature, and two times higher than the obtained in pure materials in this work. info:eu-repo/grantAgreement/ES/DGA-FEDER/T54-17R info:eu-repo/grantAgreement/ES/MINECO-FEDER/MAT2017-82183-C3-1-R info:eu-repo/semantics/openAccess by-nc-nd http://creativecommons.org/licenses/by-nc-nd/3.0/es/ 6.364 2021 MATERIALS SCIENCE, CERAMICS 2 / 29 = 0.069 2021 Q1 T1 1.107 2021 Materials Chemistry 2021 Q1 Ceramics and Composites 2021 Q1 8.9 2021 info:eu-repo/semantics/article info:eu-repo/semantics/acceptedVersion Mora, M. Universidad de Zaragoza (orcid)0000-0003-4747-7327 Dura, O.J. Torres, M.A. Universidad de Zaragoza (orcid)0000-0003-3995-5763 Madre, M.A. Universidad de Zaragoza (orcid)0000-0002-0794-3998 Marinel, S. Sotelo, A. Universidad de Zaragoza (orcid)0000-0001-7056-0546 5002 305 Universidad de Zaragoza Dpto. Ingeniería Diseño Fabri. Área Expresión Gráfica en Ing. 5001 065 Universidad de Zaragoza Dpto. Ciencia Tecnol.Mater.Fl. Área Cienc.Mater. Ingen.Metal. 41, 1 (2021), 402-408 J. Eur. Ceram. Soc. Journal of the European Ceramic Society 0955-2219 832972 http://zaguan.unizar.es/record/106597/files/texto_completo.pdf Postprint 2524255 http://zaguan.unizar.es/record/106597/files/texto_completo.jpg?subformat=icon icon Postprint oai:zaguan.unizar.es:106597 articulos driver 2024-01-04-11:04:23 ARTICLE