Nanograins
Mostrando 1-5 de 5 artigos, teses e dissertações.
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1. Sputtering Power Induced Physical Property Variation of Nickel Oxide Films by Radio Frequency Magnetron Sputtering
NiO thin films were deposited on Si and Corning 1737 glass substrates using radio frequency (rf) magnetron sputtering system. The physical properties of NiO films under different sputtering power were thoroughly studied. The XRD results indicated that as-prepared NiO films with the sputtering power above 100 W developed only (200) preferred orientation. The
Mat. Res.. Publicado em: 01/02/2018
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2. Microstructural Evolution of Cu-10at%C Nanocomposite Powder During High Energy Mechanical Milling
The microstructural evolution of Cu-10at%C nanocomposite powder during high energy mechanical milling (HEMM) of Cu/graphite powder mixture was studied. It was found that the efficiency of milling in refining the microstructure of the copper matrix was very high with the presence of graphite in the Cu/graphite powder mixture. The average grain size of the Cu
Mat. Res.. Publicado em: 17/11/2015
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3. Caracterizações de propriedades microestruturais e mecânicas de ligas AA 1100 e AA 5052 processadas pela técnica de laminação acumulativa ("Accumulated Roll Bonding - ARB"). / Characterization of microestrutural and mechanical properties from AA1100 and AA5052 alloys that were processed by Accumulated Roll Bonding - ARB.
The present work is related to the production, in a laboratory scale, of a metallic microstructure having a grain size smaller than one micrometer, through the Accumulated Roll Bonding technique(ARB), for two different aluminum alloys, namely AA 1100 and AA 5052. The strips obtained by the ARB technique have been characterized by their mechanical properties
Publicado em: 2009
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4. Estudo das propriedades estruturais locais de fluidos magnéticos : da nanopartícula à dispersão
Local structural properties of magnetic fluids based on nanosized particles of zinc, copper or nickel ferrite are investigated. Nanograins prepared by a soft chemistry method are dispersed in acidic medium thanks to a core-shell strategy that prevents the particles from dissolution. Their chemical composition is no longer homogeneous and they can be describe
Publicado em: 2007
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5. Deposição de nano-grãos de Co em uma matriz de CoO/Al2O3 por Magnetron Sputtering
Sistemas granulares magnéticos podem ser formados por grãos ou aglomerados magnéticos cujo tamanho é de alguns nanômetros. Estes nano-grãos magnéticos apresentam diferentes fases de ordenamento magnético, como o superparamagnetismo, e podem estar envolvidos tanto por matrizes metálicas como matrizes isolantes. Estes sistemas possuem uma riqueza de f
Publicado em: 2007