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Mostrando ítems 21-30 de 36
Degradação da resistência à corrosão de aços inoxidáveis duplex, devido ao envelhecimento em baixas temperaturas por tempos prolongados.
(Universidade Federal de São Carlos, 2004-08-30)
Although duplex stainless steels exhibit good performance in many severe corrosive environments, their corrosion resistance can be hampered by precipitation of chromium (Cr) rich phases during aging heat treatments.
Micr ...
Análise da processabilidade de blendas PBT/ABS compatibilizadas in situ com copolímeros acrílicos
(Universidade Federal de São Carlos, 2007-12-14)
Poly(butylene terephthalate)/acrylonitrile-butadiene-styrene (PBT/ABS) blends show high toughness at room temperature, low ductile-brittle transition temperature and stable morphology when compatibilized. The flowability ...
Uso do método do trabalho essencial de fratura (EWF) para avaliar a tenacidade de blendas poliméricas.
(Universidade Federal de São Carlos, 2005-03-11)
Initially it was made a well elaborated study on the essential work
of fracture method (EWF) using the polyamide 6 (PA6) because this polymer
shows high difficult to evaluate its toughness. The PA6 is a semi-crystalline
polymer, ...
Processamento de pós ultrafinos e nanométricos por moagem de alta energia para a obtenção de compósitos cerâmicos Al2O3-(5%vol.)TIC.
(Universidade Federal de São Carlos, 2002-09-13)
The major objective of this thesis was to study the processing behaviour of Al2O3 ultra-fine and nanosized powders obtained by high energy milling
(HEM), to produce, after forming and sintering, Al2O3 .(5%vol.)SiC and Al2O3 ...
Conformação por spray da liga formadora de fase amorfa Fe66B30Nb4
(Universidade Federal de São Carlos, 2008-08-07)
The goal of this doctoral thesis was to contribute to the technology of amorphous metals production with dimensions of the order of millimeters or centimeters through the process of spray forming for the ternary Fe66B30Nb4 ...
Estudos microrreológicos da blenda PBT/SAN.
(Universidade Federal de São Carlos, 2006-09-22)
This work was motivated by the need of a better understanding of the
microrheological characteristics of polybutylene terephthalate, PBT, polymer
blends, such as the matrix phase PBT and the styrene-acrylonitrile, SAN
copolymer ...
Estudo da tenacidade à fratura por meio do método do trabalho essencial de fratura (EWF) da blenda PBT/ABS, reforçada com fibra de vidro
(Universidade Federal de São Carlos, 2008-06-05)
High rubber content acrylonitrile-butadiene-styrene terpolymer (ABS) has been used to tough PBT. As a result, super tough PBT/ABS blends under notched Izod impact have been obtained. However, there has been a significant ...
Microestrutura e propriedades mecânicas de ligas Al-Si hipoeutéticas conformadas por spray.
(Universidade Federal de São Carlos, 2005-06-29)
The aims of this work were the microstructural and tensile properties
characterization of the hypoeutectic spray formed Al-Si 319 and 380 alloys. The
alloys were melted by induction furnace, gas atomized with nitrogen ...
Seleção de ligas com alta tendência de formação de estrutura amorfa
(Universidade Federal de São Carlos, 2007-03-08)
The understanding of the law that explain why certain alloys form amorphous
structure by cooling the molten melt under cooling rates lower than others alloys
remains as one of the great challenges of the materials science ...
Modificação microestrutural da liga Al-Si 380 conformada por spray com a co-injeção de partículas contendo fases intermetálicas
(Universidade Federal de São Carlos, 2007-12-19)
The aim of this work was to determine the microstructure and the mechanical properties of a spray formed Al-Si 380 alloy in different conditions as follow: co-injection of particles containing intermetallic phases, extrusion ...