OLANDIR VERCINO CORREA
6 resultados
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Artigo IPEN-doc 22600 Development of electrodeposited Fe-Cr-P amorphous metallic alloys1999 - KUNIOSHI, C.T.; CORREA, O.V.; LIMA, N.B. de; RAMANATHAN, L.V.Artigo IPEN-doc 22561 High temperature erosion-oxidation behavior of thermally sprayed NiCr based alloy and cermets coatings2006 - KUNIOSHI, C.T.; CORREA, O.V.; RAMANATHAN, L.V.Artigo IPEN-doc 12242 The corrosion resistance of materials used for the manufacture of ear piercing studs2003 - CORREA, O.V.; SAIKI, M.; ROGERO, S.O.; COSTA, I.Artigo IPEN-doc 20093 Corrosion performance of anodized AZ91D magnesium alloy: effect of the anozizing potential on the film structure and corrosion behavior2014 - OLIVEIRA, MARA C.L. de; PEREIRA, VIVIAM S.M.; CORREA, OLANDIR V.; ANTUNES, RENATO A.Artigo IPEN-doc 11847 High temperature oxidation and erosion-oxidation behavior of HVOF sprayed Ni-20Cr, WC-20Cr-7Ni and Crsub(3)csub(2)-Ni-20Cr coatings2006 - KUNIOSHI, C.T.; CORREA, O.V.; RAMANATHAN, L.V.The oxidation and erosion–oxidation (E–O) behaviour of high velocity oxy fuel sprayed Ni–20Cr alloy as well as WC and Cr3C2 cermet coatings on a steel substrate were studied. The E–O tests were carried out in a rig with specimen assemblies that were rotated through a fluidized bed of erodent particles in the temperature range 500–850°C and with erodent impact velocities of 2·5– 19·5 m s−1. Alumina powder (∼200 μm) was used as the erodent. The oxidation behaviour of the coatings was determined gravimetrically. The Ni–20Cr and Cr3C2–25(Ni–20Cr) coatings showed significantly higher oxidation resistance than the WC–20Cr–7Ni coating, especially at temperatures above 800°C. The E–O resistance of the coatings was determined by wastage, as a function of temperature. The three coatings did not show any significant change in E–O at temperatures up to 500–600°C. At higher temperatures, wastage increased with temperature, reached a maximum at 700°C and then decreased with further increase in temperature. Different E–O regimes were identified. The specimen surfaces were examined in a scanning electron microscope and their roughness determined. E–O maps have been drawn to define conditions under which the coatings undergo low, moderate and severe wastage.Artigo IPEN-doc 14531 Preparation of PtRu/C electrocatalysts by hydrothermal carbonization process for methanol electro-oxidation2009 - TUSI, M.M.; BRANDALISE, M.; CORREA, O.V.; OLIVEIRA NETO, A.; LINARDI, M.; SPINACE, E.V.