Overheating
Mostrando 1-12 de 26 artigos, teses e dissertações.
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1. High-Frequency Induction Heating of Al-Si-Cu-Mg aluminum alloy in Thixoforming
Thixoforming is the process of shaping near net shape metal components in a semisolid state. The process consists of preparing feedstock, reheating and shaping. Reheating the billet is the most critical step in thixoforming. Induction heating requires precise temperature control to obtain globular microstructure and prevent process defects, such as insuffici
Mat. Res.. Publicado em: 28/10/2019
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2. Porosity, water sorption and solubility of denture base acrylic resins polymerized conventionally or in microwave
Abstract The proper selection of polymerization cycle is important to prevent overheating of the monomer that could cause degradation, porosity and, consequently, deleterious effects on the denture base properties. Objective This study evaluated the porosity, water sorption and solubility of acrylic resins (Vipi Cril-VC and Vipi Wave-VW) after conventional
J. Appl. Oral Sci.. Publicado em: 07/05/2018
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3. Effects of Te additions and stirring in the In segregation in Ga1-xInxSb alloys
Abstract The influence of tellurium in the indium segregation of Ga1-xInxSb:Te ingots obtained by the conventional vertical Bridgman method (CVBM), under stirred and non-stirred conditions, was investigated. Three Te-doped ingots and three no-doped ingots were unidirectionally solidified at a constant speed of 2.0 mm/hour, inside quartz ampoules, closed unde
REM, Int. Eng. J.. Publicado em: 2016-12
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4. Extra corporeal shockwave lithotripsy resulting in skin burns – a report of two cases
Severe skin injury after extracorporeal shock wave lithotripsy (ESWL) is rare. We describe two patients who suffered full thickness skin burns following ESWL for renal calculi. One patient was treated conservatively and the other underwent debridement with skin grafting. We speculate that failure of the thermostatic mechanism of the lithotripter, leading to
Int. braz j urol.. Publicado em: 2014-12
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5. Effect of cage configuration in structural and optical properties of tin films grown by cathodic cage discharge
Cathodic cage discharge was developed recently in order to eliminate phenomena as edge effect and overheating, which occurs during conventional processes. In this study, the effect of cage configuration in active species during the deposition process and optical properties of TiN film were studied. TiN compound was chosen because its optical properties are v
Mat. Res.. Publicado em: 10/05/2013
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6. Estudos sobre gases dissolvidos em óleos vegetais isolantes - influência de arco elétrico e superaquecimento / Dissolved gases analysis in insulating oils - the influence of electric arc and overheating
A inovação tecnológica é uma ferramenta muito poderosa utilizada para avançar estrategicamente no mundo competitivo. Esta tendência também é uma realidade nos sistemas de isolamento dos transformadores. Os isolamentos passam então a ser avaliados tanto do ponto de vista econômico, quanto do ambiental e da segurança. Em todo o mundo, são consumido
Publicado em: 2011
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7. Temperature change in pig rib bone during implant site preparation by low-speed drilling
OBJECTIVES: The purpose of this study was to evaluate the temperature change during low-speed drilling using infrared thermography. MATERIAL AND METHODS: Pig ribs were used to provide cortical bone of a similar quality to human mandible. Heat production by three implant drill systems (two conventional drilling systems and one low-speed drilling system) was e
Journal of Applied Oral Science. Publicado em: 2010-10
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8. Estudo da fluidez das ligas de Al-Si: efeitos da temperatura de vazamento e da qualidade do metal líquido / Fluidity of Al-Si alloys: effects of pouring temperature and the molten metal quality
This work involves the aluminum alloys fluidity length, in which the effect of pouring temperature and the molten metal quality were studied. Initially a permanent mold with vertical partition, with filling under counter gravity was designed and manufactured. In this mold, a several sets of experiments were realized using Al-Si alloys with eutectic and hypoe
Publicado em: 2009
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9. Estudo e desenvolvimento de código computacional para análise de impacto entre estruturas levando em consideração efeitos térmicos / Study and development of computational code to analyze impact in structures considering thermal effects
It becomes quite important study the thermal effects when considering impact in structures, because besides the mechanical energy changing into heat, one may consider the changes in the material properties due overheating. In this sense, the main goal of this work is develop a thermodynamic formulation and its implementation, based in the Helmholtz free-ener
Publicado em: 2009
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10. Inclusões fluidas nos minerais associados a mineralização uranífera da jazida do Engenho (anomalia 09), Província Uranífea de Lagoa Real, Bahia / Fluid Inclusions in minerals associated to uranium mineralization in Engenho Deposit (anomaly 09) Lagoa Real Uranium Province Bahia
The Engenho deposit (anomaly 09) is south-eastern from Cachoeira Mine (anomaly 13), in the northern part of the Province. The uranium mineralization is associated to albitites (over 70% of albite/oligoclase). Epidosites with uranium may also occur. The albitite main minerals are pyroxene, garnet, albite/oligoclase feldspar, amphibole and biotite. Pyroxene, g
Publicado em: 2009
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11. Computer based model for the heating of a single phase induction motor applied on washing machine during agitation task / Modelagem computacional do aquecimento de um motor de indução monofasico aplicado em maquinas de lavar roupas durante a etapa de agitação
This study motivation was finding a computer-based model that was able to foresee if the duty cycle applied in a single-phase induction motor implies or not in an overheating that can compromise the motor insulation. The solution presented here is based on finding a difference equation in which the system output (motor temperature at time k+1) is calculated
Publicado em: 2007
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12. Design and commissioning of an intelligent robotic saw system for assisting osteotomy surgery.
An orthopaedic saw design and commissioning to be driven by a robot was envisaged based on the requirement to develop a system that would allow a physician to automate some surgical procedures that involve limb manipulation. The project goal is to design and build a proof-of-concept prototype employing both mechatronics and Integrated Product Design techniqu
Publicado em: 2007