9 documents found, page 1 of 1
Caracterização de ligas Fe-Ni processadas por metalurgia do pó: influência dos ...
Lobo, Cândido Jorge de Sousa; Figueiredo, Nathália Cândido; Silva, Marcelo José Gomes daPowder metallurgy becomes an important process for manufacture of parts with complex geometry, making it more feasible. The big challenge is to minimize the damage caused by the residual porosity by this procedure. The purpose of this study was to characterize and evaluate the influence of temperature on the mechanical properties (hardness) of alloy Fe-70% Ni 30%, used in electronics and structural materials fo...
Peças cerâmicas fabricadas usando pó de granito com adição dos produtos da comb...
Pinheiro, Halisson de Souza; Nogueira, Ricardo Emílio Ferreira Quevedo; Xavier, Louise Caroline Peixoto; Lobo, Cândido Jorge de SousaThe technical feasibility of the use of granite residues as raw material in the manufacture of ceramic test specimens, with additions of the Coal Mineral Combustion (PCC's) products as a reforestation phase, was studied. The materials used were White Wing granite (RGAB) and Coal Combustion Products (PCC), in concentrations of 0% w / w, 5% w / w, 10% w / w, 15% w / P of PCCs. For a characterization of the raw ma...
Influência do molibdênio na dureza de ligas Fe- 30%Ni
Fonseca, Mariana Hellen de Freitas; Lobo, Cândido Jorge de Sousa; Silva, Marcelo José Gomes daOs produtos feitos de ferro puro contendo Ni expandiram enormemente as aplicações de produtos sinterizados, incluindo a fabricação de peças que suportam altas cargas em automóveis tais como transmissões. Deste modo, este trabalho pretende contribuir com um estudo direcionado à identificação de fases em ligas Fe- Ni-Mo sinterizadas a temperatura de 1.100°C e processadas por moagem de alta energia (MAE), buscando...
Estudo sobre a utilização do rejeito de granito rosa Iracema como matéria-prima...
Lobo, Cândido Jorge de Sousa; Nogueira, Ricardo Emílio Ferreira Quevedo; Argonz, Raquel; Sasaki, José Marcos; Sales, Juscelino ChavesThe spinning navel is a component widely used in the textile industry. Such navels are basicaly alumina or high-alumina ceramic parts, and since they are not produced in Brazil, they are imported at high costs. For this reason, an alternative material for the fabricationof hte navel was proposed, consisting of granite powders.Since granites are basically silicates and exhibit lower mechanical strength and hardn...
Estudo sobre a utilização do rejeito de granito rosa Iracema como matéria-prima...
Lobo, Cândido Jorge de Sousa; Nogueira, Ricardo Emílio Ferreira Quevedo; Argonz, Raquel; Sasaki, José Marcos; Sales, Juscelino ChavesIn this work, physical properties of sintered compacts made from granite powder reinforced with alumina particles were determined. This composite is proposed as an economic alternative to the more expensive pure alumina, currently used in the fabrication of spinning navels for the textile industry. The composite material was compared to the materials from some spinning navels currently in use in a textile plant...
Caracterização química das cinzas de fundo originadas pela combustão, em usina ...
Pinheiro, Halisson de Souza; Nogueira, Ricardo Emílio Ferreira Quevedo; Lobo, Cândido Jorge de Sousa; Nobre, Antonio Igor SampaioBottom ashes generated during combustion of a mineral coal from Colombia were characterized by X-ray fluorescence spectrometry and X-ray diffraction. The interest in this particular coal is due to the fact that it will be used by a thermal power plant in Ceara, Northeastern Brazil, where it could produce over 900 tons of different residues/combustion products every day. Results from Xray fluorescence allowed id...
Caracterização de ligas Fe-Ni processadas por metalurgia do pó: influência dos ...
Ribamar, Giovani Gonçalves; Lobo, Cândido Jorge de Sousa; Silva, Marcelo José Gomes daPowder metallurgy becomes an important process for obtaining pieces with complex geometry, making them increasingly viable. The aim of this work is to characterize and evaluate the influence of mixing energy and mixing time on the microstructure and mechanical properties (hardness) of the alloy Fe 70% - 30% Ni, used in electronics and structural materials of automotive engine parts, being produced by powder met...
Estudo sobre a utilização do rejeito do granito rosa iracema como matéria-prima...
Lobo, Cândido Jorge de SousaThe present work was motivated by the need to minimize environmental impacts caused by granite quarrying. One of the ways to achieve this objective is to find value-added technical applications for granite residues. In a previous work it has been demonstrated that these silica-rich granite powders can be employed as raw-materials for the production of textile thread-guides. One very promising application for th...
Estudo das propriedades mecânicas de ligas Fe-Ni e Fe-Ni-Mo processadas por met...
Lobo, Cândido Jorge de SousaThe products made of pure iron containing Ni greatly expanded the applications of sintered products , including the manufacture of parts that withstand high loads such as transmissions in cars . The equilibrium diagram of Fe-Ni alloys demonstrate the presence of α and FeNi3 phase , but the phase transformations require a satisfactory chemical homogenization obtained by conventional processes for production of a...