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Mostrando ítems 131-140 de 264
Conformação por spray da liga amorfizável a base de ferro [(Fe0,6Co0,4)0,75B0,2Si0,05]96Nb4
(Universidade Federal de São Carlos, 2015-10-29)
The use of amorphous metals becomes a large market in the industry of micro-components and/or milimetric machine parts, presenting excellent magnetic and mechanical properties and high glass forming ability such as the ...
Desenvolvimento da microestrutura do BaCeO3 dopado com ítrio sob a influência do ZnO como aditivo de sinterização: correlação com a condutividade protônica
(Universidade Federal de São Carlos, 2013-12-13)
Yttrium-doped barium cerate perovskites are promising electrolyte for solid oxide fuel cell (SOFC) due to high proton conductivity at intermediate temperature, 400-600°C. However, the proton conductivity is not an intrinsic ...
Aplicação e avaliação de critérios semi-empíricos para o desenvolvimento de novas ligas vítreas do sistema Ti-Cu-Ni
(Universidade Federal de São Carlos, 2013-06-26)
The selection of good glass forming compositions is not a simple undertaking and many groups work on models and theoretical approximations in order to predict or at least guide the laborious and expensive experimental ...
Tratamentos de superfícies em Ti-CP, Ti-6Al-4V e Ti-6Al- 7Nb visando a osseointegração de implantes: propriedades das superfícies e respostas osteoblásticas
(Universidade Federal de São Carlos, 2013-07-10)
The aim of this study was to evaluate the properties of the surfaces of CP-Ti, Ti-6Al-4V, Ti-6Al-7Nb alloys modified via chemical treatments, as well as evaluating the behavior of human osteoblastic cells as function of ...
Influência da adição de Nb, Ti e Zr nas propriedades de fluência da liga HP fundida por centrifugação
(Universidade Federal de São Carlos, 2014-08-05)
This work aimed to evaluate the influence caused by Nb single addition and by Nb-Ti and Nb-Zr combined addition in the high temperature mechanical properties of a centrifugally cast HP alloy. Particular investigation was ...
Síntese e sinterização de pós-compósitos de aluminaboretos de alta dureza por moagem de alta energia
(Universidade Federal de São Carlos, 2014-08-04)
This work was aimed to obtain powder composite mixtures of ceramic phases with high hardness through high energy ball milling synthesis and characterization of sintered samples in terms of hardness. In an exploratory phase, ...
Nucleação, crescimento de cristais, relaxação e escoamento viscoso em vidros de diopsídio e diborato de lítio
(Universidade Federal de São Carlos, 2014-04-23)
Heated glasses undergo a variety of kinetic processes, such as crystallization, relaxation and viscous flow, that are very important both scientifically and technologically. In this work, we measured and rigorously analyzed ...
Efeito do (NaLix)CO3, COM 0 ≤ x ≤ 2, na sinterização e condutividade elétrica do Ce0,8Gd0,2O1,9
(Universidade Federal de São Carlos, 2014-11-26)
The principles of operation of Solid Oxide Fuel Cells (SOFC) and Molten Carbonate Fuel Cells (MCFC) were merged to create a hybrid device, which can combine the advantages and reduce the disadvantages of both cells, improving ...
Desenvolvimento de um método para levantamento de tecnologias de materiais empregados no trem de força automotivo (powertrain) a partir de patentes
(Universidade Federal de São Carlos, 2012-05-27)
This research approaches the study from patents of technologies for materials used in power train of motor vehicles, to provide additional information in order to support decision making in this universe, especially in the ...
Caracterização microestrutural e modelagem do amaciamento dinâmico a quente do aço inoxidável austenítico ASTM F 138, utilizado em implantes ortopédicos
(Universidade Federal de São Carlos, 2014-07-10)
Flow stress curves of ASTM F 138 austenitic stainless steel were obtained through isothermal hot torsion testing in the temperature range of 900- 1200oC and in the strain rate range of 0,01-10s-1, totaling 24 experiments. ...