Materials Literature
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Recently, there has been an explosion of literature dedicated to organic electrodes for energy storage applications. While inorganic materials, especially oxides, have generally being explored for these applications, the guiding principles for successful electrical energy storage-maximizing capacity and energy density…
У роботі представлений термодинамічний аналіз ефективності циркуляційного способу нагріву пеку. Основним показником ступеня термодинамічної досконалості процесу є ексергетичний коефіцієнт корисної дії (ККД) η екс
O CALDose_X e uma ferramenta computacional desenvolvida para organizar e apresentar simulacoes de exames de raios-X em adultos. O software pode apresentar resultados de distribuicoes de doses absolutas desde que se conheca a grandeza de normalizacao INAK (INcident Air Kerma). O INAK e obtido atraves das curvas de rend…
In this dissertation we present work on the development, characterization, and analysis of an easy-to-fabricate, reusable bioinspired switchable adhesive that consists of a film-terminated fibrillar layer atop a substrate. We use a dynamic rod model and stability analysis to define and analyze the buckling of a fibril…
Dentre os processos de fabricacao utilizados atualmente, a soldagem tem destaque no ramo industrial. Os produtos que passam por esse processo encontram-se em nosso dia-a-dia, tais como: bicicletas, carros, motos, cadeiras de metal ou aluminio, portoes, grades, avioes, pontes e etc. A soldagem e aplicada a metais ferro…
The mixed glass former effect (MGFE) is a non-linear variation of transport properties as a function of the glass former composition when one glass network former is replaced by another one. In order to better understand the MGFE, the effect of the variation of the glass former composition on the transport of a select…
High performance catalysts or energy devices such as solar cells and batteries which involve reactions and transport problems require nanostructured functional materials that are highly ordered mesoporous and crystalline materials. The self-assembly based structure direction of functional inorganic materials by block…
This thesis presents a study of single-walled carbon nanotubes (SWNTs) using revised Cosserat rod models. A SWNT is a thin hollow cylinder, with diameter of the order of 1 nm and length possibly as large as 1[MICRO SIGN]m. Its wall is composed of a single layer of carbon atoms with an estimated thickness around 0.335…
Two vibrating bubbles submerged in a fluid influence each others' dynamics via sound waves in the fluid. Due to finite sound speed, there is a delay between one bubble's oscillation and the other's. This scenario is treated in the context of coupled nonlinear oscillators with a delay coupling term. It has previously b…
This thesis presents a new potentially low-cost massively parallel electron lithography system, which we term as RadioIsotope-powered Parallel Electron Lithography (RIPEL). We demonstrate its applications to solar cells, thermo-opto-mechanical excitation, inertial sensors, micro-speakers, ultrasonic mechanical DNA sen…
Poly(3-hydroxybutyrate) (PHB) is a biodegradable and biocompatible polymer produced by many bacteria as a stored carbon source. Recent reviews have recently recognized PHB granules as a biomaterial that can be functionalized for use in various biomedical applications. The studies in this dissertation describe a novel…
The resolving equations for the calculation of the stability of polymer compressed rods with the creep using Galerkin method are obtained. The problem is solved in the case of a simply supported pivotally-rod having an initial bending in the plane of the lower stiffness, and in the case of off-center application of fo…
Atomistic simulations can illuminate detailed mechanisms of brittle and ductile fracture and plasticity. However, there are many limitations to these simulations like short timescales, small spatial scales, and limitations of the discretization. Using molecular dynamics (MD) and multiscale methods, adaptations can be…
O presente estudo aborda a caracterizacao das modificacoes ocorridas na microestrutura de um aco de Alta Resistencia e Baixa Liga (ARBL), mais especificadamente do aco API 5L Grau X-80, de grande utilizacao na industria de petroleo e gas no transporte de materias primas a longas distâncias. Afim de que se obtenha uma…
Orientador: Celso Prevedello
Los bioplasticos representan un interesante sector en el mundo de los materiales y actualmente son objeto de un profundo estudio tanto desde el punto de vista academico como tecnologico. Ello es debido principalmente a su origen natural y a su capacidad de biodegradabilidad en condiciones controladas. El almidon es un…
为了解决固体氧化物燃料电池(SOFC)陶瓷连接材料的低成本制备难题, 设计了与LaCrO3基连接材料和Ni基阳极均具有良好烧结匹配性能的新型复合材料NiO/ La0.7Ca0.3Cr0.97O3−δ (LCC97)作为管式SOFC的支撑体. 详细研究了NiO含量(5wt%、25wt%、50wt%、75wt%)对复合支撑体的烧结性能、微观组织、孔隙率、电导性能、热膨胀系数等的影响, 结果表明: LCC97与NiO具有优良的烧结和化学匹配性能, NiO/LCC97(1:1, wt%)具有最优的综合性能. 以其为支撑体, 采用浆料浸渍法制备LCC97湿膜, 1400℃空气条件下共烧, 获得了致密LCC97连接材料薄膜.
A diamond-like carbon (DLC) based solid-lubricant film was designed and DLC films were successfully prepared using a microwave plasma enhanced magnetron sputtering deposition technology. Post-test characterizations including Raman spectrometry, X-ray diffraction, nano-indentation test, adhesion test, friction coeffici…
Los recubrimientos protectores son frecuentemente aplicados para incrementar la resistencia a la corrosion y a la oxidacion de aceros ferritico-martensiticos. En este estudio, los recubrimientos de aluminio modificado con Si fueron depositados mediante deposicion Quimica en Fase Vapor en Lecho Fluidizado a presion atm…
Current biomaterial approaches for repairing the cornea's ocular surface upon injury are partially effective due to inherent material limitations. As a result there is a need to expand the biomaterial options available for use in the eye, which in turn will help to expand new clinical innovations and technology develo…