Search Results - "Horovistiz, A.L"

Electrical conductivity and microstructure relationship in ternary systems based on cerium oxide by Horovistiz, A.L., Rocha, R.A., Muccillo, E.N.S.

“…The effects of small amounts of bismuth and sodium on the electrical conductivity of gadolinia-doped ceria are investigated. Bulk specimens of nominally pure…”
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An image processing method for morphology characterization and pitting corrosion evaluation by Codaro, E.N, Nakazato, R.Z, Horovistiz, A.L, Ribeiro, L.M.F, Ribeiro, R.B, Hein, L.R.O

“…A digital image processing and analysis method has been developed to classify shape and evaluate size and morphology parameters of corrosion pits. This method…”
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Fractal analysis along stretch zone for an aluminum alloy by Horovistiz, A.L., Hein, L.R.O.

“…The topography of fracture surface along stretch zone front for Al7050 is analyzed about its fractal behavior and compared against local distributions of…”
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Carbon nanotube-based bioceramic grafts for electrotherapy of bone by Mata, D., Horovistiz, A.L., Branco, I., Ferro, M., Ferreira, N.M., Belmonte, M., Lopes, M.A., Silva, R.F., Oliveira, F.J.

“…Bone complexity demands the engineering of new scaffolding solutions for its reconstructive surgery. Emerging bone grafts should offer not only mechanical…”
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Microstructural and electrical characterizations of chemically prepared Ce0.8Gd0.2−x(Ag, Sr)xO1.9 (0≤x≤0.02) by Horovistiz, A.L., Muccillo, E.N.S.

“…Gadolinia-doped ceria with co-additions of Sr and Ag were prepared by the cation complexation technique. The influence of co-additives on the densification,…”
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Quantification of microstructural features in gadolinia-doped ceria containing co-additives by digital image analysis by Horovistiz, A.L., Muccillo, E.N.S.

“…A digital image processing and analysis method has been developed to evaluate the microstructural features of chemically synthesized gadolinia-doped ceria…”
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Effects of Yb:Ti ratio on transport properties of Yb 2 ± x Ti 2 ± x O 7 ± δ by Horovistiz, A.L., Abrantes, J.C.C., Fagg, D.P., Frade, J.R.

“…The ionic conductivity of Yb 2Ti 2O 7-based materials can be improved by compositional changes, including deviations from the nominal cation ratio Yb:Ti,…”
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Effects of composition and frozen-in conditions on bulk and grain boundary conductivities of Yb 2Ti 2O 7-based materials by Horovistiz, A.L., Boguslavskii, M.V., Abrantes, J.C.C., Shlyakhtina, A.V., Fagg, D.P., Shcherbakova, L.G., Frade, J.R.

“…The present work provides a comprehensive interpretation of factors which affect cation and/or anion disordering in Yb 2Ti 2O 7-based materials, and their…”
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Effects of Fe-additions on sintering and transport properties of Yb 2Ti 2 − y Fe y O 7 − δ by Horovistiz, A.L., Fagg, D.P., Abrantes, J.C.C., Frade, J.R.

“…Partial substitution of Fe for Ti in Yb 2Ti 2 − y Fe y O 7 − δ has been used to improve the sinterability of these ion conducting pyrochlore-type materials,…”
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Effects of composition and frozen-in conditions on bulk and grain boundary conductivities of Yb2Ti2O7-based materials by Horovistiz, A.L., Boguslavskii, M.V., Abrantes, J.C.C., Shlyakhtina, A.V., Fagg, D.P., Shcherbakova, L.G., Frade, J.R.

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Effects of Yb:Ti ratio on transport properties of Yb2±xTi2±xO7±δ by Horovistiz, A.L., Abrantes, J.C.C., Fagg, D.P., Frade, J.R.

“…The ionic conductivity of Yb2Ti2O7-based materials can be improved by compositional changes, including deviations from the nominal cation ratio Yb:Ti, combined…”
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Ionic and electronic conductivity of Yb 2+ x Ti 2− x O 7− x/2 materials by Abrantes, J.C.C., Levchenko, A., Shlyakhtina, A.V., Shcherbakova, L.G., Horovistiz, A.L., Fagg, D.P., Frade, J.R.

“…Bulk and grain boundary conductivities of Yb 2+ x Ti 2− x O 7− x/2 ( x = 0, 0.1, 0.18 and 0.29) materials were studied by impedance spectroscopy in the range…”
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De-convolution of bulk and interfacial contributions based on impedance spectroscopy with external load resistance by Ferreira, A.A.L., Horovistiz, A.L., Abrantes, J.C.C., Pérez-Coll, D., Núñez, P., Frade, J.R.

“…De-convolution of impedance spectra is often ambiguous, mainly due to overlapped contributions, or when a prevailing interfacial contribution raises…”
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Interpretation of impedance spectra based on local minima of imaginary Z vs frequency by Abrantes, J.C.C., Ferreira, A.A.L., Horovistiz, A.L., Frade, J.R.

“…Impedance spectra have been analysed based on interpretation of minima of the imaginary part of impedance vs frequency. One derived useful relations and used…”
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An image analysis study of pit formation on Ti–6Al–4V by Codaro, E.N, Nakazato, R.Z, Horovistiz, A.L, Ribeiro, L.M.F, Ribeiro, R.B, Hein, L.R.O

“…Metallographic techniques and digital image processing have been used to investigate heat-treated Ti–6Al–4V pitting corrosion, often used as aircraft…”
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Effects of Fe-additions on sintering and transport properties of Yb2Ti2-yFeyO7-δ by HOROVISTIZ, A. L, FAGG, D. P, ABRANTES, J. C. C, FRADE, J. R

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Comparison of fracture surface and plane section analysis for ceramic grain size characterisation by Horovistiz, A.L., Frade, J.R., Hein, L.R.O.

“…A method has been developed to obtain quantitative information about grain size and shape from fractured surfaces of ceramic materials. One elaborated a…”
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