Magnetization Curve
Mostrando 1-12 de 18 artigos, teses e dissertações.
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1. Characterization of reverse martensitic transformation in cold-rolled austenitic 316 stainless steel
ABSTRACT In this work the reversion of the strain-induced ?’-martensite to ?’-austenite was studied in a series of AISI 316 stainless steels (SS) specimens. The samples were submitted to 63% reduction in thickness by rolling at a temperature of -70ºC, to achieve high martensite content. The reversion of martensite to austenite was made by means of isoch
Matéria (Rio J.). Publicado em: 19/07/2018
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2. Quantitative MRI data in Multiple Sclerosis patients: a pattern recognition study
Abstract Introduction Multiple Sclerosis (MS) is a neurodegenerative disease characterized by inflammatory demyelination in the central nervous system. Quantitative Magnetic Resonance Imaging (qMRI) enables a detailed characterization of brain tissue, but generates a large number of numerical results. In this study, we elucidated the main qMRI techniques a
Res. Biomed. Eng.. Publicado em: 28/05/2018
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3. An Improved Method for Acquisition of the Parameters of Jiles-Atherton Hysteresis Scalar Model Using Integral Calculus
Abstract An accurate modeling of materials is essential to obtain reliable results in fields calculation. The Jiles-Atherton approach is widely used for modeling the magnetic hysteresis and depends on its set of five parameters to properly represent material. In this article is proposed an original methodology for obtaining this set of parameters avoiding th
J. Microw. Optoelectron. Electromagn. Appl.. Publicado em: 2017-03
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4. CARACTERIZACÃO DAS PROPRIEDADES ESTRUTURAIS E MAGNÉTICAS DA SÉRIE SmFe1xMnxO3. / CHARACTERIZATION OF THE PROPERTIES STRUCTURAL MAGNETIC AND SERIES SmFe1 xMnxO3.
In this work we synthesized sample of the series SmFe1xMnxO3 , in which 1 x 0 whit variation of x = 0:1. Our main objective was the structural and magnetic characterization of the compounds. First, to the best of our knowledge, these samples were obtained by the combustion reaction method, with which we achieve success in obtaining unique polycrystalline pha
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 10/02/2012
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5. Interaction fields evaluation in fine particle systems
A computer simulation model for estimation of the interaction fields in fine particle systems has been developed. The method uses the experimental 8Mα(H) plot, constructed from the Fourier description of the initial magnetization curve and the hysteresis loop, and the 8M(H) plot, obtained from the remanence curves. The dependencies of the interaction fields
Publicado em: 2011
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6. Investigation of structural, electronic and magnetica properties of Ca2-xLaxFelrO6, Sr2-xLaxFelrO6 e TbMnO3 oxides / Investigação as propriedades estruturais, eletronicas e magneticas dos oxidos Ca2-xLaxFelrO6, Sr2-xLaxFelrO6 e TbMnO3
For many decades the transition metal oxides are subject of great scientific interest because of the wide variety of interesting physical properties and their potential technological applications. More recently, for example, oxides of transition metals with multiferroic properties have been considered as potential magneto-electronic devices. Many transition
Publicado em: 2010
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7. Estudo da convergência no método de elementos finitos aplicado a dispositivos eletromagnéticos não lineares. / Survey on the convergence of non-linear finite element method applied to electromagnetic devices in two-dimension.
This work presents a study on the convergence of non-linear finite analysis applied to the modeling of electromagnetic devices with plane symmetry. Three aspects have been thoroughly investigated which have influence on the convergence performance, namely: the relaxation factor in the Newton-Raphson algorithm, the model of the magnetization curve and the cho
Publicado em: 2007
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8. AlteraÃÃes fisiolÃgicas em Saccharomyces cerevisiae submetida a campo eletromagnÃtico estÃtico
The objective of this study was to investigate the influence of static non-homogeneous magnetic fields on the physiology of the yeast S. cerevisiae growing in culture media containing glucose. The fermentations were driven into biorreators with magnetic rods produced with NdFeB (Neodymium-iron-boron) alloy, of 0.5â diameter and 0.25â thickness (model 27DNE
Publicado em: 2007
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9. Analysis of nuclear relaxation in granular systems
The longitudinal nuclear magnetic relaxation time, T1, of powdered samples was analyzed following the theory proposed by Browstein and Tarr to explain the T1 reduction of water confined in biological cells and the proposed by Rabbani and Edmonds where the molecular diffusion in liquids is substituted by spin diffusion to interpret the T1 behavior in solid pa
Brazilian Journal of Physics. Publicado em: 2006-03
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10. Remanent magnetization in the antiferromagnetic systems / Magnetização remanente em sistemas antiferromagnéticos"
In the context of low anisotropy, the magnetization measurements to find out the magnetic effects induced by the substitution of Mn+2 by Cu+2 íons in the quaseone-dimensional Heisenberg-like antiferromagnets CsMn1-xCuxA3.2H2O (A = Cl,Br) were made. In the diluted samples of the Br derivative, we observe the appearance of a remanent magnetization (Mr) below
Publicado em: 2006
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11. COMPORTAMENTO DE VÓRTICES EM NANODISCOS MAGNÉTICOS NA PRESENÇA DE DEFEITOS NÃO-MAGNÉTICOS
In recent years, the progress of the nanotechnology allowed the manufacture of magnetic samples with dimension in the nanometric scale, as well as the evolution of experimental techniques to measure its properties. It was verified experimentally that vortices appear as states of magnetization of minimum energy in magnetic dots. In nanometric scale, the effec
Publicado em: 2006
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12. MAGNETOSTRICÇÃO E RUÍDO BARKHAUSEN EM AÇOS ELÉTRICOS DE GRÃO NÃO-ORIENTADO
Non-oriented electrical steels (NO) studied in this work are used in applications that demand isotropy of magnetic properties along the plane of the sheet, which the magnetic field is applied in different angles with respect to the rolling direction (RD). In magnetic materials as the steels, magnetic losses can be separated in two components: low induction l
Publicado em: 2005