Eutectic Temperature
Mostrando 13-24 de 39 artigos, teses e dissertações.
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13. Melting Temperature and Wetting Angle of AlN/Dy2O3 and AlN/Yb2O3 Mixtures on SiC Substrates
AbstractThis work aims to evaluate the melting temperature and wetting behavior of AlN/Re2O3 (Re = Dy, Yb) mixtures when in contact with SiC substrates at high temperatures, in order to define whether these compounds can be further used to induce a more effective liquid phase sintering of SiC-based products. The prepared samples were placed on SiC plates and
Mat. Res.. Publicado em: 2015-10
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14. An investigation into the dissolution characteristics of γ precipitates in Mg-3Al-Zn alloy
In non-equilibrium conditions, the coring phenomena may occur in the α-Mg solid solution and γ-Mg17Al12 phase forms in the microstructure of AZ magnesium alloy series. This eutectic phase may introduce detrimental effect on workability of wrought alloys. In the present work, the dissolution characteristics of γ phase have been investigated in AZ31 wrought
Mat. Res.. Publicado em: 01/08/2014
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15. Facile preparation of Mn-doped CeO2 Submicrorods by composite-hydroxide-salt-mediated approach and their magnetic property
Mn-CeO2 submicrorods have been obtained from anomalous CeO2 particles though a novel composite-hydroxide-salt-mediated (CHSM) approach. This method is based on a reaction between a metallic salt and a metallic oxide in a solution of composite-hydroxide-salt eutectic at ~225 ºC and normal atmosphere without using an organic dispersant or capping agent. The m
Mat. Res.. Publicado em: 22/03/2013
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16. Efeito da modificação com estrôncio na microestrutura e nas propriedades mecânicas da liga 356 / Effect of strontium on the microstructure and mechanical properties alloys 356
The properties of aluminum-silicon alloys are strongly dependent on the casting process used, the chemical additions made to control eutectic structure, primary silicon and grain structure, and molten metal treatment to reduce hydrogen gas content and to remove inclusions. Modification treatments transform the flake eutectic silicon into a fibrous form produ
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 29/02/2012
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17. Facile synthesis of inverse spinel NiFe2O4 nanocrystals and their superparamagnetic properties
Spinel NiFe2O4 nanocrystals have been obtained by means of a novel composite-hydroxide-salt-mediated approach, which is based on a reaction between metallic salt and metallic oxide in the solution of composite-hydroxide-salt eutectic at ~225 ºC and normal atmosphere without any organic dispersant or capping agent. The obtained products are characterized by
Mat. Res.. Publicado em: 22/11/2012
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18. Rapid solidification of an Al-5Ni alloy processed by spray forming
Recently, intermetallic compounds have attracted much attention due to their potential technological applications as high-temperature materials. In particular the intermetallic compounds, associated with the Al-Ni binary system stand out as promising candidates for high-temperature materials for the use in harsh environments. It is expected that a bulk Al-Ni
Mat. Res.. Publicado em: 08/05/2012
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19. Evolution of eutectic spacing during unidirectional solidification of Al-Ni alloys
Hypoeutectic Al-Ni alloys show a ductile phase α distributed with a β phase Al3Ni fragile where β serves as reinforcement of the structure of the material. The eutectic composition alloys obey the relationship: λ2.v = C, where λ is the eutectic spacing, v is a tip growth rate and C is a constant. The aim of this study is to establish correlations betwee
Materials Research. Publicado em: 27/05/2011
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20. Estudo do equilibrio solido-liquido em sistemas binarios de alcoois graxos atraves da calorimetria exploratoria diferencial / Solid-liquid equilibrium for fatty alcohols binary system by differential scanning calorimetry
Fatty alcohols are minor constituents of vegetal tissues, being mainly found in vegetal waxes. Fatty alcohols are used in industry as emulsifiers, surfactants or emollients agents. There are many studies about the use of fatty alcohol associated with fatty acids as substitutes for the hydrogenation process of margarine manufacturing and other edible emulsion
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 16/03/2010
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21. Preparação e caracterização de uma mistura eutética baseada em um derivado de óleo essencial extraído do Syzygium aromaticum L. / Preparation and characterization of a eutectic mixture based in an essential oil derivative extracted from Syzygium aromaticum L.
The Syzygium aromaticum L. plant produces the cloves buds which are dried. From these dried buds the essential oil is extracted. The major compound is eugenol. Some of eugenols pharmacological properties include fungicidal, bactericidal, anesthetic, and other activities. However, eugenol (EUG) was modified to eugenyl acetate (EA) by adding the acetate group
Publicado em: 2010
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22. Caracterização microestrutural da decomposição de carbonetos eutéticos M2C em ferro fundido multicomponente do tipo Fe-2C-5V-5Cr-5Mo-5W tratados isotermicamente à 950ºC e 1.050ºC. / Microstructural characterization of M2C eutectic carbides decomposition in multicomponent cast iron of type Fe-2C-5V-5Cr-5Mo-5W isothermically heat treated at 950°C e 1.050°C.
Multicomponent White Cast Iron are high temperature wear resistant ferrous alloys, presenting eutectic MC and M2C carbides in their as cast structure. In the present work the decomposition microstructures of the metastable M2C carbide after heat treatments was characterized in a model multicomponent white cast iron with composition (in weight): 2 wt% C and 5
Publicado em: 2010
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23. Ternary phase diagram of ketamine ((R,S)-2-(2-chlorophenyl)-2methylaminocyclohexanone) in ethanol and preliminary studies aiming at Enantioselective Crystallization of S-ketamine
Crystallization is an important industrial-scale process for the purification of enantiomers that depends on a phase diagram. In this work, the ternary phase diagram of R- and S-ketamine in ethanol was determined. The eutectic point indicated that crystallization of pure enantiomers from solutions containing more than 75% of the desired enantiomer is feasibl
Brazilian Journal of Chemical Engineering. Publicado em: 2009-06
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24. 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