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Now showing items 21-30 of 143
Processamento e caracterização de nano-biocompósitos de Poli(hidroxibutirato-co-hidroxivalerato)/montimorilonita modificada organicamente (PHBV/OMMT) com adição de plastificante
(Universidade Federal de São Carlos, 2010-12-10)
A current search for new materials that are economically viable and ecologically correct has led to the implementation of many studies aimed at improving the properties and processability of biodegradable polymers. This ...
Sinterização, cristalização, desenvolvimento e caracterização de vitrocerâmicas de baixo coeficiente de expansão térmica do sistema Li2O - Al2O3 SiO2 (LAS)
(Universidade Federal de São Carlos, 2010-10-15)
Glass-ceramics based on the Li2O-Al2O3-SiO2 (LAS) system represent the most important (commercial) family. They are required for applications where extreme dimensional stability and thermal shock resistance are of utmost ...
Avaliação do dano por choque térmico em concretos refratários via espectroscopia acústica ressonante não-linear
(Universidade Federal de São Carlos, 2012-03-02)
In this thesis the Non-linear Resonant Acoustic Spectroscopy Technique used to evaluate the mesoscopic non-linearity was incorporated into the Impulse Excitation Technique, which is extensively applied to the evaluation ...
Novas ligas formadoras de fase amorfa do sistema Ni-Nb-Zr e seu comportamento mecânico
(Universidade Federal de São Carlos, 2011-04-15)
Ni-based amorphizable alloys in the bulk form show a good combination of properties, with high mechanical strength and hardness, good ductility and excellent corrosion resistance. These alloys have been used in recent ...
Caracterização da resistência à corrosão de ligas inoxidáveis Fe-Mn-Si-Cr-Ni-(Co) com efeito de memória de forma
(Universidade Federal de São Carlos, 2011-03-03)
In this work, the corrosion behavior of three Fe-Mn-Si-Cr-Ni (Co) shape memory stainless steels (SMSS) in aggressive environments was characterized. The electrochemical corrosion behavior in 0.5 M H2SO4 solution was obtained ...
Efeito da adição de Ni na microestrutura bainítica de um novo aço para roscas e cilindros de plastificação de polímeros
(Universidade Federal de São Carlos, 2019-09-02)
Nitriding steels, such as DIN 1.8550, are used in the manufacture of screws and barrels for injection molding machines and plastic extruders. The hardening process of DIN 1.8550 occurs via water or oil quenching followed ...
Deformação da fase dispersa e degradação de blendas poliméricas em extrusora dupla-rosca aberta e fechada
(Universidade Federal de São Carlos, 2011-09-05)
In order to obtain flexibility of the processing in a twin-screw extruder and operate it as an internal mixer, the second phase dispersion and deformation and degradation were analyzed during processing in an open and ...
Avaliação da durabilidade do concreto utilizado em postes em São Luís
(Universidade Federal de São Carlos, 2016-06-20)
Reinforced concrete structures built in coastal areas, such as electricity distribution poles, are constantly attacked by aggressive environmental agents. Rebar corrosion mechanism is a specific manifestation of electrochemical ...
Comportamento mecânico em fadiga da liga de titânio beta metaestável Ti-5553
(Universidade Federal de São Carlos, 2016-10-14)
The microstructure of metastable beta Ti alloys is a decisive factor that
governs their properties and, therefore, the assessment of the relation between
the microstructure and the fatigue response means an advance in ...
Desenvolvimento de uma matriz de fenda instrumentada para o monitoramento reo-óptico do processo de extrusão
(Universidade Federal de São Carlos, 2015-03-13)
A novel slit-die flow cell is presented for the evaluation of extrusion thermo-mechanical history on the flow character of polymers. The rheo-optical concept is claimed once both flow-birefringence and rheological character ...