Materials Literature
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En esta investigación se evaluó el efecto del contenido de nanopartículas de óxido de titanio en la solución anilina/HCl sobre la conductividad de la polianilina - sal esmeraldina (PANI-SE). El objetivo fue obtener una polianilina de más alta conductividad eléctrica y mejor estructura cristalina. Se evaluaron dos dife…
O estudo de diferentes fluidos para serem usados em ebulidores e em vasos de pressao e uma tendencia em todo o mundo. Entre os diferentes fluidos estudados, uma classe se destaca: os nanofluidos. Estes fluidos sao obtidos de uma dispersao homogenea de nanoparticula em um fluido, por exemplo, a agua pura. Esta pesquisa…
A utilizacao de ligas niquel-titânio em dispositivos que passam por ciclagem termica e/ou mecânica quando em servico vem sendo muito comum. Para que tais dispositivos realizem a funcao desejada com sucesso, e necessario que haja estabilidade funcional e mecânica no decorrer da ciclagem. Nesse contexto, o estudo dos pr…
The atmospheric pressure PECVD deposition and texturization of hydrophobic coatings using liquid fluorinated C6F12 and C6F14 precursors are investigated. The effect of the carrier gas (argon and helium) is discussed in terms of the behavior of the gas phase and of the characteristics of the deposited film. Mass spectr…
Quasicrystals (QC´s) exhibit particular features when compared to a conventional crystalline solid materials. They present an aperiodic, however, highly ordered atomic structure. These phases exhibit a variety of interesting properties for application as protective coatings, including high hardness, low friction coeff…
In this work we studied the dependence of two organic precursors, sucrose and glycerin, in the process to obtain CoFe2O4 nanoparticles by co-precipitation method. The samples were studied by different techniques of structural and magnetic characterization. X-ray diffraction Measurements associated with the Rietveld re…
We construct a new model of two-dimensional quantum spin systems that combines intrinsic topo- logical orders and a global symmetry called flavour symmetry. It is referred as the bilayer Doubled Semion model (bDS) and is an instance of symmetry-enriched topological order. A honeycomb bi- layer lattice is introduced to…
Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
Jurkat tat cell line reaction on short-term (24 h) in vitro contact with model composite implants designed for bone tissue bioengineering has been studied. The titanium samples was coated by thin nanostructured calcium phosphate (CaP) layer was formed by rf-magnetron sputtered deposition. An increase in the number of…
In the pursuit of improved power density and efficiency of power-electronics, there is a need to develop high temperature die-attach materials that are mechanically stable at operating temperatures of 300◦C and provide excellent thermal conductivity between die and substrate materials. There are no obvious choices for…
Iron-Chromium-Aluminum (FeCrAl) thin films have been deposited on Zircaloy-2 (Zry2) and yttria-stabilized zirconia (YSZ) by magnetron sputtering, and they have been tested with respect to the oxidation weight gain in high temperature steam. In 700C steam environment, the FeCrAl-coated Zry2 samples have significantly r…
A fim de se diminuir o tempo de execucao de ensaios de fadiga de alto ciclo de componentes estruturais, procura-se aumentar suas frequencias de carregamento. Entretanto, um aumento indiscriminado pode distorcer os resultados experimentais. Neste trabalho, sao apresentados diversos fatores que limitam o aumento da freq…
Os acos inoxidaveis estao sendo cada vez mais utilizados pela industria petroquimica por manterem suas qualidades mecânicas, em temperaturas elevadas, e pela resistencia a corrosao. O custo deste material e considerado alto, quando comparado ao aco-carbono, entretanto suas propriedades e sua eficiencia tornam o invest…
The objectives of this research are to determine the influence the voltage and time variations of nickel plating against braightness, hardness, and surface roughness of aluminum specimen and to determine the optimum conditions of coating, so that the condition was obtained plating process copper, nickel and chromium a…
Dilatacao termica e o nome que se da ao aumento do volume de um corpo ocasionado pelo aumento de sua temperatura, o que causa o aumento no grau de agitacao de suas moleculas e consequentemente aumento na distância media entre as mesmas. O conhecimento de tal grandeza nos materiais e de suma importância, pois a variaca…
As celulas a combustivel (CaC) sao dispositivos eletroquimicos que transformam a energia quimica de determinados combustiveis em energia eletrica, por meio de reacoes de oxirreducao. Possuem uma estrutura basica que consiste em uma camada de eletrolito intercalando dois eletrodos: catodo (eletrodo positivo) e anodo (e…
Submitted by Luciana Ferreira (lucgeral@gmail.com) on 2016-07-26T11:39:23Z No. of bitstreams: 2 Dissertação - João Paulo Santos Carmo - 2016.pdf: 2412305 bytes, checksum: 19777a4bdead74386cf88a869674700c (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5)
Presented to the 12th Annual Symposium on Graduate Research and Scholarly Projects (GRASP) held at the Heskett Center, Wichita State University, April 29, 2016.
Electrospinning is the process of nanofibers formation under electrical field, where polymer solution or melt is being stretched by electrostatic forces. Nanometer dimension TiO2 nanoparticles have been recently proposed as attractive filler materials for biodegradable polymer matrices as it enhances cell attachment a…
Presented to the 12th Annual Symposium on Graduate Research and Scholarly Projects (GRASP) held at the Heskett Center, Wichita State University, April 29, 2016.