Buscar
Mostrando ítems 21-30 de 189
Produção e caracterização física e mecânica de ferros fundidos nodulares e ferros fundidos nodulares austemperados com adição de nióbio
(Universidade Federal de Minas GeraisUFMG, 2012-06-29)
The production of ductile cast iron and austempered ductile cast iron - ADI- usually involves an inoculation 0.03-0.06% Magnesium and the presence of Chromium, Nickel, Copper and Molybdenum. The addition of Niobium is not ...
Effect of additive distribution in H2 absorption and desorption kinetics in MgH2 milled with NbH0.9 or NbF5
(Pergamon-Elsevier Science Ltd, 2018-04-12)
This paper presents a comparative study of H2 absorption and desorption in MgH2 milled with NbF5 or NbH0.9. The addition of NbF5 or NbH0.9 greatly improves hydriding and dehydriding kinetics. After 80 h of milling the ...
Evaluation of glass ionomer cements properties obtained from niobium silicate glasses prepared by chemical process
(Elsevier B.V., 2005-03-15)
Glass ionomer cements (GICs) are glass and polymer composite materials. These materials currently find use in the dental field. The purpose of this work is to obtain systems based on composition 4.5SiO(2)-3Al(2)O(3)-XNb2O5-2CaO ...
Evaluation of glass ionomer cements properties obtained from niobium silicate glasses prepared by chemical process
(Elsevier B.V., 2005-03-15)
Glass ionomer cements (GICs) are glass and polymer composite materials. These materials currently find use in the dental field. The purpose of this work is to obtain systems based on composition 4.5SiO(2)-3Al(2)O(3)-XNb2O5-2CaO ...
Titanium-35niobium alloy as a potential material for biomedical implants: in vitro study
(Elsevier B. V., 2015)
Versatilidade de compostos a base de nióbio: aplicação em oxidação de glicerina residual, em terapia fotodinâmica e formação de nanogéis
(Universidade Federal de Minas GeraisUFMG, 2019-02-25)
The objective of this work was to produce reactive oxygen species fromniobium polyoxe obtained from the reaction of commercial niobium oxides and hydrogen peroxide. Hydrogen peroxide promotes the leaching of oligomeric ...
Production, microstructural characterization and mechanical properties of as-cast Ti-10Mo-xNb alloys
(BLACKWELL PUBLISHING, 2008)
Beta titanium (Ti) alloys are one of the most promising groups of Ti alloys for biomedical applications. This work presents the production, microstructural characterization, and mechanical properties of as-cast Ti-10Mo-xNb ...
Er3+-doped niobium alkali germanate glasses and glass-ceramics: NIR and visible luminescence properties
(Elsevier B.V., 2019-10-01)
Niobium alkali germanate glasses doped with Er3+ up to 4.0 mol% were synthesized by the melt-quenching technique. Glass-ceramics were obtained by controlled heat treatment of the pristine glass. Thermal and optical properties ...
Análise da influência de adição de óxido de nióbio nas propriedades de matrizes cimentícias
(Universidade Tecnológica Federal do ParanáCuritibaBrasilPrograma de Pós-Graduação em Engenharia CivilUTFPR, 2021-05-24)
Brazil is the world`s largest holder of niobium reserves with about 98% of all the mineral on the planet. Despite this, a large part of the mineral is exported as raw material to other countries, due to the lack of investment ...