Semi Solid Materials
Mostrando 1-12 de 18 artigos, teses e dissertações.
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1. Effect of Pouring Temperature and Water Cooling on the Thixotropic Semi-solid Microstructure of A319 Aluminium Cast Alloy
The cooling slope (CS) casting is the simplest and cheapest technique for producing feedstock materials with non-dendritic microstructure. Such materials are required for semi-solid metal (SSM) processing methods such as thixoforming. In the present investigation, the effect of the pouring temperature and the water cooling on the thixotropic microstructure o
Mat. Res.. Publicado em: 2015-02
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2. Miniaturized most probable number for the enumeration of Salmonella sp in artificially contaminated chicken meat
Salmonella is traditionally identified by conventional microbiological tests, but the enumeration of this bacterium is not used on a routine basis. Methods such as the most probable number (MPN), which utilize an array of multiple tubes, are time-consuming and expensive, whereas miniaturized most probable number (mMPN) methods, which use microplates, can be
Rev. Bras. Cienc. Avic.. Publicado em: 2014-03
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3. Composição do leite e diagnóstico de mastite em caprinos) = Milk composition and mastitis diagnosis in goats / Milk composition and mastitis diagnosis in goats
Background: Milk is one of the most used foodstuffs by humans in their diet. The quality of goat milk is already regulated by Law, which takes into consideration its physical-chemical and microbiological composition parameters. Several factors contribute for the alteration of the physical-chemical and microbiological parameters of caprine milk. These include
Publicado em: 2011
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4. O espaço dos resíduos sólidos domiciliares e de sua logística reversa na geografia urbana: diagnóstico e modelo de gestão pró-ativo
The present study investigates the reversal logistic of waste in urban geography and proposes a model of proactive management. As methodological principles, were used bibliographical review, field research and document analysis. In order to reflect this context, concepts like reverse logistic, urban space, selective collection, environment, solid waste, sust
Publicado em: 2010
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5. Biodegradação de polietileno tereftalato (PET) por fungos ligninoliticos / Biodegradation of polyethylene tereftalate by ligninolytic fungi
In 1977, polyethylene terephthalate (PET), a plastic derived from petroleum, started to be used as raw material for packaging material and engineering plastics. However, under an environmental point of view, the use of plastics is considered problematic because of their high durability and high volume when present in domestic and industrial solid wastes. Thi
Publicado em: 2009
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6. Nanofibres characterization through image processing techniques. / Caracterização de nanofibras através de técnicas de processamento de imagens.
The electrospinning technique represents a simple and convenient process to provide polymers and ceramics bers with both solid and hollow interiors that are exceptionally long in length, uniform in diameter, varying within the interval of few nanometers to several microns, and diversied in composition. Despite the versatility and potencially the scanning ele
Publicado em: 2009
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7. Project and assembling of pneumatic transport pilot unit in diluted phase for studying the relationship between the pressure drop and the distribution of granular particles into the cross section of industrial pipes / Projeto e montagem de unidade piloto de transporte pneumatico em fase diluida para estudo da relação entre a perda de carga e a distribuição de particulas granulares na seção transversal de dutos industriais
The pneumatic transport that involves the use of air particles to move materials through pipes is a major operation in various industries and chemical processes. Typical examples are systems for the conversion of energy from coal, catalytic cracking, drying and transport of solid and fine granular. The conventional pneumatic transport is often operated in di
Publicado em: 2009
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8. Tixoformabilidade e tixoforjamento de ligas Al-Xwt%Si-0,5wt%Mg em prensa excentrica com matriz aberta / Thixoformability and thixoforming of Al-Xwt%Si-0,5wt%Mg in an accentric press with matrix-type open alloy
Este trabalho apresenta uma análise da viabilidade do emprego de quatro ligas Al- Si-Mg como matéria-prima tixoconformável, e a utilização destas em tixoforjamento em prensa do tipo excêntrica em matriz do tipo aberta. As quatro ligas Al-Si-Mg, com 1, 2, 4 e 7wt%Si e 0,5wt%Mg, foram produzidas por ultra-refino (adição de Al-5wt%Ti- 1wt%B), e a avalia
Publicado em: 2008
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9. Vulnerabilidade e exclusão social: uma abordagem sobre representações sociais de catadores de materiais recicláveis em Ipatinga-MG / Vulnerability and social exclusion: an approach to social representations held by recyclable materials pickers in Ipatinga, Minas Gerais State
Sustainability, vulnerability and social exclusion permeate discussions about the problem of solid wastes that in recent past decades have become a worldwide concern. New and old garbage, growing production volume and final destiny, selective collection, environmental education, the recycling industry diverse present discussions emphasizing, in the final ana
Publicado em: 2007
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10. Analise do desgaste de ferramentas no fresamento com alta velocidade de aços endurecidos / Analysis of tool wear in high speed milling of hardened steels
Usually, the die and moulds components, which are responsible for the part forms, have complex geometries and are made of high hardness materials, what cause difficulties for their machining. High Speed Milling has become an alternative for machining these components. This work aims to broaden the performance understanding and the wear mechanisms on tools us
Publicado em: 2007
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11. Optimization of Polyurethanes for Protection of Flexible Pipes Subject at Abrasion Wear / Otimização de poliuretanos para protetores de linhas flexíveis sujeitos ao desgaste abrasivo
n the last year the Petrobras Company gone self sufficiency of Brazil in the production of petroleum, Its take great effort to achieve technology in the exploration of deeper oil-well offshore. The extraction of petroleum deeper off-shore is make through flexible pipes that has multi layers of metal materials and polymeric materials, connected semi-submersib
Publicado em: 2007
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12. OtimizaÃÃo de poliuretanos para protetores de linhas flexÃveis sujeitos ao desgaste abrasivo / Optimization of Polyurethanes for Protection of Flexible Pipes Subject at Abrasion Wear
n the last year the Petrobras Company gone self sufficiency of Brazil in the production of petroleum, Itâs take great effort to achieve technology in the exploration of deeper oil-well offshore. The extraction of petroleum deeper off-shore is make through flexible pipes that has multi layers of metal materials and polymeric materials, connected semi-submers
Publicado em: 2007