Search Results - "Cumbrera, Francisco L."

A Molecular Dynamics study of grain boundaries in YSZ: Structure, energetics and diffusion of oxygen by González-Romero, Robert L., Meléndez, Juan J., Gómez-García, Diego, Cumbrera, Francisco L., Domínguez-Rodríguez, Arturo

“…Several physical characteristics of the Σ3, Σ5, Σ11 and Σ13 grain boundaries in model YSZ bicrystals (namely grain boundary energies, radial distribution…”
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Elusive super-hard B6C accessible through the laser-floating zone method by Moshtaghioun, Bibi Malmal, Cumbrera, Francisco L., Gómez-García, Diego, Peña, Jose I.

“…Boron carbide is among the most promising ceramic materials nowadays: their mechanical properties are outstanding, and they open potential critical…”
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Additive-free superhard B4C with ultrafine-grained dense microstructures by Moshtaghioun, B. Malmal, Cumbrera, Francisco L., Ortiz, Angel L., Castillo-Rodríguez, Miguel, Gómez-García, Diego

“…A unique combination of high-energy ball-milling, annealing, and spark-plasma sintering has been used to process superhard B4C ceramics with ultrafine-grained,…”
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Powder-metallurgy fabrication of ZrB2–hardened Zr3Al2 intermetallic composites by high-energy ball-milling and reactive spark-plasma sintering by López-Arenal, Jesús, Moshtaghioun, Bibi Malmal, Cumbrera, Francisco L., Gómez-García, Diego, Ortiz, Angel L.

“…A powder metallurgy route combining high-energy ball-milling (HEBM) of elemental powders and reactive spark-plasma sintering (SPS) is proposed for the…”
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The prolific polytypism of silicon carbide by Ortiz, Angel L., Sánchez-Bajo, Florentino, Cumbrera, Francisco L., Guiberteau, Fernando

“…A worked example of polytypism is presented, aimed at assisting undergraduates in the learning and instructors in the teaching of this topic. In particular,…”
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Phase assembly and electrical conductivity of spark plasma sintered CeO2–ZrO2 ceramics by Poyato, Rosalía, Cruz, Sylvia A., Cumbrera, Francisco L., Moreno, Berta, Chinarro, Eva, Odriozola, José A.

“…Ce x Zr 1− x O 2 ( x  = 0.10, 0.16 and 0.33) nanocrystalline powders were obtained by a two-step synthesis technique and sintered by spark plasma sintering…”
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Nanostructured Spark Plasma Sintered Ce-TZP Ceramics by Cruz, Sylvia A., Poyato, Rosalía, Cumbrera, Francisco L., Odriozola, Jose A.

“…In this work, spark plasma sintering (SPS) of 10 mol% CeO2‐doped ZrO2 nanocrystalline powders, obtained by a two‐step synthesis procedure, allows the…”
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Modelling the states of minimum and maximum disorder in B4C ceramics: Which one is expected in spark plasma sintered boron carbide? by Cumbrera-Hernández, Francisco L., López-Arenal, Jesús, Moshtaghioun, Bibi Malmal, Ortiz, Angel L., Gómez-García, Diego

“…Boron carbide (B4C) ceramics, and especially the modern B4C ones fabricated by spark plasma sintering, are promising structural materials. The crystal…”
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Analytical formulation of the variance method of line-broadening analysis for Voigtian X-ray diffraction peaks by Ortiz, Angel L., Cumbrera, Francisco L., Sánchez-Bajo, Florentino

“…An alternative formulation of the variance method for the line‐broadening analysis of polycrystalline materials is presented. It maintains the theoretical…”
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Evaluation of the phase composition of (NH4)2SO4+(NH4)H2PO4 mixtures by X-ray diffractometry by Ortiz, Angel L., Cumbrera, Francisco L., Pérez, José, del Vas, Beatriz, Pérez, Eduardo

“…The phase composition of standard (NH4)2SO4 + (NH4)H2PO4 mixtures was investigated by X-ray diffractometry (XRD) using the internal-standard,…”
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Crystal structure of [NBu 4] 2[Pd 2{C 4(COOMe) 4} 2(μ-OH) 2] determined ab initio by charge flipping by Ortiz, Angel L., Cumbrera, Francisco L., Pérez, José, Meléndez-Martínez, Juan J., Palatinus, Lukáš

“…The crystal structure of bis(tetra- n-butylammonium)bis(μ 2-hydroxo)-bis(1,2,3,4-tetrakis(methoxycarbonyl)-1,3-butadiene-1,4-diyl)-di-palladium, [NBu 4] 2[Pd…”
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Contact fracture of brittle bilayer coatings on soft substrates by Miranda, Pedro, Pajares, Antonia, Guiberteau, Fernando, Cumbrera, Francisco L., Lawn, Brian R.

“…Contact-induced fracture modes in trilayers consisting of a brittle bilayer coating on a soft substrate were investigated. Experiments were performed on model…”
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Quantitative Phase-Composition Analysis of Liquid-Phase-Sintered Silicon Carbide Using the Rietveld Method by Ortiz, Angel L., Cumbrera, Francisco L., Sánchez-Bajo, Florentino, Guiberteau, Fernando, Xu, Huiwen, Padture, Nitin P.

“…Accurate quantitative X‐ray diffraction analysis of SiC‐based ceramics is difficult because of the significant overlap of the Bragg reflections from the…”
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A simple procedure for accurately assessing the stoichiometry and structural disorder of TiN ceramics by X-ray diffractometry by Cumbrera, Francisco L., Cano-Crespo, Rafael, Moshtaghioun, Bibi Malmal, Gómez-García, Diego, Ortiz, Angel L.

“…Accurately assessing the stoichiometry and structural disorder of TiN ceramics is very important for understanding their properties, but is often not done…”
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Microstructural Evolution in Liquid-Phase-Sintered SiC: Part II, Effects of Planar Defects and Seeds in the Starting Powder by Deshpande, Swarnima A., Bhatia, Tania, Xu, Huiwen, Padture, Nitin P., Ortiz, Angel L., Cumbrera, Francisco L.

“…The effects of planar‐defect density in a β‐SiC starting powder and the addition of α‐SiC seeds to that powder on microstructural evolution in…”
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Quantifying structural disorder in spinels by X-ray diffractometry through constrained–restrained Rietveld refinements by Cumbrera, Francisco L., Moshtaghioun, Bibi Malmal, Gómez-García, Diego, Ortiz, Angel L.

“…Accurate determination of the structural disorder (i.e., cation misplacement, anionic and cationic vacancies, and reduced cations) of spinels is crucial to…”
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Determination of Lattice Parameters of Polytypes in Liquid-Phase-Sintered SiC Using the Rietveld Method by Hernández-Jiménez, Angel, Ortiz, Angel L., Sánchez-Bajo, Florentino, Guiberteau, Fernando, Cumbrera, Francisco L.

“…Accurate determination of lattice parameters of polytypes in liquid‐phase‐sintered (LPS) SiC by conventional X‐ray powder diffractometry is difficult due to…”
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Some crystallographic considerations on the novel orthorhombic ZrO2 stabilized with Ta doping by Cumbrera, Francisco L., Sponchia, Gabriele, Benedetti, Alvise, Riello, Pietro, Pérez-Mato, J. Manuel, Ortiz, Angel L.

“…Some crystallographic considerations on the novel orthorhombic ZrO2 (o-ZrO2) stabilized at ambient conditions by Ta substitutional doping are presented…”
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Some crystallographic considerations on the novel orthorhombic ZrO 2 stabilized with Ta doping by Cumbrera, Francisco L., Sponchia, Gabriele, Benedetti, Alvise, Riello, Pietro, Pérez-Mato, J. Manuel, Ortiz, Angel L.

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Phase assembly and electrical conductivity of spark plasma sintered Ce[O.sub.2]-Zr[O.sub.2] ceramics by Poyato, Rosalia, Cruz, Sylvia A, Cumbrera, Francisco L, Moreno, Berta, Chinarro, Eva, Odriozola, Jose A

“…[Ce.sub.x][Zr.sub.1-x][O.sub.2] (x = 0.10, 0.16 and 0.33) nanocrystalline powders were obtained by a two-step synthesis technique and sintered by spark plasma…”
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