Thermal Shock
Mostrando 1-12 de 191 artigos, teses e dissertações.
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1. Thermal decomposition and reaction sintering for synthesis of mullite-zirconia composite using kaolin, γ-alumina and zirconia
Abstract The refractory materials used in the wall of the furnaces for glass melting can be prepared from mullite-zirconia composite material. The composite of mullite/zirconia was synthesized from Iraqi kaolin, γ-alumina, and zirconia using thermal decomposition with reaction sintering at 1600 °C. Several batches were prepared with various ratios of kaoli
Cerâmica. Publicado em: 2021-03
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2. Notalgia paresthetica and neuropathic itch. Case report
RESUMO JUSTIFICATIVA E OBJETIVOS: A notalgia parestésica é um distúrbio neuropático sensitivo que acomete a região dorsal entre os dermátomos de T2 a T6, caracterizando-se por uma evolução crônica com períodos de remissão e exacerbação. O objetivo deste relato foi descrever um caso de notalgia parestésica, desde a sua investigação clínica e
BrJP. Publicado em: 02/12/2019
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3. Characterization of Li2O-Al2O3-SiO2 glass-ceramics produced from a Brazilian spodumene concentrate
Resumo Vitrocerâmicas do sistema LAS (Li2O-Al2O3-SiO2) com elevada resistência ao choque térmico foram obtidas com sucesso com o uso de um concentrado de espodumênio brasileiro como principal matéria-prima (80%-70% em massa). Duas composições (Li2O.Al2O3.nSiO2) foram produzidas com n= 2 e 4, próximas às composições estequiométricas das fases eucr
Cerâmica. Publicado em: 15/08/2019
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4. Assembly and Testing of a Thermal Control Component Developed in Brazil
ABSTRACT: The optical solar reflector is basically a mirror of second surface with low absorptivity/emissivity ratio and negligible degradation in the space environment, which makes it an excellent coating for thermal control of satellites. It works as a radiator and is used in particular parts of the external surfaces of the satellites in order to reject th
J. Aerosp. Technol. Manag.. Publicado em: 2017-06
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5. Modeling of Variable Lamé's Modulii for a FGM Generalized Thermoelastic Half Space
Abstract In this work we consider a problem in the context of the generalized theory of thermoelasticity for a half space. The material of the half space is functionally graded in which Lamé's modulii are functions of the vertical distance from the surface of the medium. The surface is traction free and subjected to a time dependent thermal shock. The probl
Lat. Am. j. solids struct.. Publicado em: 2016-04
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6. Electrical Behavior of Carbon Fiber/Phenolic Composite during Pyrolysis
Carbon fiber reinforced carbon (CFRC) composites, also called carbon/carbon (C/C) composites are materials with superior characteristics such as low density, good thermal shock resistance, high strength and low ablation under severe environments. Due to their properties, CFRC composites are ideal candidate in the high temperature fields. By pyrolysis process
Mat. Res.. Publicado em: 03/11/2015
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7. Thermal and mechanical properties of commercial MgO-C bricks
abstractMgO-C (magnesia-carbon) refractories are widely used in several steelmaking linings. These refractories are exposed to extreme stress due to high temperatures (T > 1600 °C) required to cause the metallurgical reactions. These working conditions produced refractory wear through various related processes. The different types of degradation that the ma
Matéria (Rio J.). Publicado em: 2015-09
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8. Transient heat conduction in multiwall carbon nanotubes
In this paper, theoretical investigation is performed on two-dimensional transient heat conduction in multiwall carbon nanotubes (MWCNTs) by using a continuum model. Temperature, size and direction dependencies of thermal properties are considered. Both Fourier and non-Fourier heat conduction approaches are used and finite element models are developed to sol
Lat. Am. j. solids struct.. Publicado em: 2015-08
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9. Study on Needles and Cracks of Tin-doped Indium Oxide Tablets for Electron Beam Evaporation Process
Tin-doped indium oxide (ITO) tablets were used to deposit ITO films on p-GaN layer of light-emitting diodes. Needles and cracks in ITO tablets generated during electron beam evaporation process were deeply investigated. The formation of needles is predominantly resulted from the scanning trace, which is controlled by x and y axes scanning singles. The needle
Mat. Res.. Publicado em: 2015-06
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10. Effect of Specimen Size on the Resistance to Thermal Shock of Refractory Castables Containing Eutectic Aggregates
Thermal shock is one of the most severe conditions to which a refractory lining can be subjected to during its industrial application. Thus, there are several methods available for testing thermal shock damage resistance of refractories. Among them, a very common method is the quench test, which consists of quenching a hot refractory bar into water. After th
Mat. Res.. Publicado em: 2015-04
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11. Generalized Magneto-thermo-microstretch Response of a Half-space with Temperature-dependent Properties During Thermal Shock
Abstract The generalized magneto-thermoelastic problem of an infinite homogeneous isotropic microstretch half-space with temperature-dependent material properties placed in a transverse magnetic field is investigated in the context of different generalized thermoelastic theories. The upper surface of the half-space is subjected to a zonal time-dependent heat
Lat. Am. j. solids struct.. Publicado em: 2015
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12. Environmental Effects on Thermal Properties of PEI/Glass Fiber Composite Materials
ABSTRACT: The aim of this study was to investigate the effects of hygrothermal exposure, ultraviolet (UV) radiation, salt spray and thermal shock aging on the thermomechanical behavior of glass fiber reinforced by poly (ether-imide) (PEI) composites. Dynamic mechanical (DMA) and Thermomechanical (TMA) analyses have been performed on the aged PEI composites a
J. Aerosp. Technol. Manag.. Publicado em: 2013-06