ELINER AFFONSO FERREIRA
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Resumo IPEN-doc 18450 Microstructure and electrochemical properties of the La0.7Mg0.3Al0.3Mn0.4Co0.5NbxNi(3.8-x)(x=0.5-1.8) hybride alloys2012 - FERREIRA, E.A.; TAKIISHI, H.; FARIA R.N.Resumo IPEN-doc 18449 Effect of Nb content on the structural and electrochemical properties of the La0.7Mg0.3Al0.3Mn0.4Co(0.5-x)NbxNi3.8(x=0-0.5) hydrogen storage alloys2012 - FERREIRA, E.A.; TAKIISHI, H.; FARIA R.N.Artigo IPEN-doc 12584 The effect of milling time upon microstructures of Pr-Fe-B HD sintered magnets prepared by a low cost powder technique2006 - SOARES, E.P.; FERREIRA, E.A.; PERIGO, E.A.; TAKIISHI, H.; FARIA, R.N.Pr17Fe79B4 and Pr16Fe76B8 magnets have been produced using a combination of the hydrogen decrepitation (HD) process and a powder transfer technique. Sintered magnets have been prepared using HD powders ball milled from 9 to 36 hours. The effects of the milling stage upon microstructure have been investigated. In the Pr17Fe79B4 magnets four phases have been identified: Pr2Fe14B (Φ), Pr rich, Pr2Fe17 and Laves phase (PrFe2). In the Pr16Fe76B8 magnets three phases have been identified: Pr2Fe14B (Φ), Pr rich and Pr1+εFe4B4 (η). Good magnetic properties have been achieved in the Pr16Fe76B8 magnet produced using a fine powder milled for 18 hours (Br = 1.19 T and µ0iHc = 1.44 T). For the Pr17Fe79B4 magnet a longer milling time has been necessary to improve the magnetic properties (Br = 1.14 T and µ0iHc = 1.16T). In this case remanence and coercivity were slightly lower than that obtained in former due to the low boron content in the alloy (4 at.%).Artigo IPEN-doc 15885 Discharge capacity and microstructures of LaMgPrAlMnCoNi alloys for nickel-metal hydride batteries2010 - CASINI, J.C.S.; GALDINO, G.S.; FERREIRA, E.A.; TAKIISHI, H.; FARIA, R.N.Artigo IPEN-doc 15884 Hydrogen storage and microstructure investigations of La0.7-xMg0.3PrxAl0.3Mn0.4Co0.5Ni3.8 ALLOYS2010 - GALDINO, G.S.; CASINI, J.C.S.; FERREIRA, E.A.; FARIA, R.N.; TAKIISHI, H.Artigo IPEN-doc 18402 Microstructure and electrochemical properties of Ti-Nb-Zr-Ni alloy produced by powder metallurgy2012 - CASINI, J.C.S.; DUVAIZEM, J.H.; BOTTIGLIERI, B.V.; FERREIRA, E.A.; SOARES, E.P.; TAKIISHI, H.Artigo IPEN-doc 13281 The effect of the HDDR process on the production of Pr-Fe-Co-B-Nb sintered magnets2008 - FERREIRA, E.A.; CASINI, J.C.S.; PERIGO, E.A.; FARIA, R.N.; TAKIISHI, H.