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167 results on '"Brillo, J."'

27. Excess volume and heat of mixing in Cu-Ti liquid mixture.

Author

Amore, S., Delsante, S., Kobatake, H., and Brillo, J.

Subjects
LIQUID mixtures, COPPER-titanium alloys, MOLECULAR volume, HEAT of mixing, BINARY mixtures, MAGNETIC suspension, DENSITY
Abstract

Molar excess volume of Cu-Ti liquid mixture has been investigated to elucidate how the excess volume in binary alloys is related to mixing enthalpy and microscopic interactions. Cu-Ti is used as a key example for systems showing positive excess volume and negative mixing enthalpy. For this purpose, the density of several Cu-Ti binary mixtures has been measured over the whole composition range by the containerless technique of electromagnetic levitation as a function of temperature. A linear temperature dependence of the density has been found for all investigated alloys. In addition, the density decreases with increasing Ti content in the alloys, showing a negative deviation from the ideal solution model. As mentioned, a positive excess volume was found whereas the enthalpy of mixing is negative. This behavior has been discussed in relation with chemical ordering and the role played by attractive and repulsive interactions in the system, according to previous results obtained by means of molecular dynamics simulation on binary dense fluids. [ABSTRACT FROM AUTHOR]

Published
2013
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30. Thermophysical property measurements of liquid metals by electromagnetic levitation

Author

Brillo, J., Lohofer, G., Schmidt-Hohagen, F., Schneider, S., and Egry, I.

Subjects
Liquid metals -- Analysis, Liquid metals -- Properties, Levitation -- Usage, Levitation -- Analysis, Electromagnetic interactions -- Analysis, Engineering and manufacturing industries
Abstract

Byline: J. Brillo, G. Lohofer, F. Schmidt-Hohagen, S. Schneider, I. Egry Electromagnetic levitation is a useful technique for containerless processing of liquid metals. In combination with non-contact diagnostic tools it can be used for completely non-invasive measurements of thermophysical properties of metallic melts. Considerable progress has been made in this field in recent years. This paper reviews methods and results, including those obtained in microgravity.

Published
2006

31. New Fluids

Author

Wakeham, W. A., Egry, I., Brillo, J., Nagasaka, Y., Assael, M., Brennecke, J. F., Massel, M., and Shi, C.

Subjects
Molten Metals, Viscosity, Thermophysical properties, Scattering techniques, Microgravity
Published
2014

32. Density of Liquid Ni-Ti and a New Optical Method for its Determination.

Author

Brillo, J., Schumacher, T., and Kajikawa, K.

Subjects
NICKEL-titanium alloys, ISOTHERMAL compression, HEAT resistant alloys, TENSILE strength, PRECIPITATION (Chemistry)
Abstract

Liquid Ni-Ti alloys were processed in a containerless way using the technique of electromagnetic levitation in order to determine their densities. An improved optical method was utilized where, in addition to recording shadowgraph images from the side, a second camera recorded images of the sample from the top. A correction factor for the density was calculated from the top-view images. This method yields measurements insensitive to droplet rotation and static deformation which removes the need to assume axial symmetry. The measured densities are discussed in terms of the molar volume. A negative molar excess volume was obtained, indicating that Ni-Ti is a highly non-ideal system. These measurements were then used to test a recently proposed relationship between the molar excess volume, the excess free energy, and the isothermal compressibility. For the first time, the excess volume of a binary alloy, i.e., Ni-Ti, is adequately predicted by a thermodynamic model. [ABSTRACT FROM AUTHOR]

Published
2019
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34. ADVANCED MEASUREMENT DEVICES FOR THE MICROGRAVITY ELECTROMAGNETIC LEVITATION FACILITY EML

Author

Brillo, J., Fritze, H., Lohoefer, G., Schulz, M., and Stenzel, C.

Subjects
Wissenschaftliche Experimente, Electromagnetic levitation, inductive measurement technique, oxygen sensing and control, surface tension, micro gravity, liquid metals, electrical resistivity
Abstract

This paper reports on two advanced measurement devices for the microgravity electromagnetic levitation facility (EML), which is currently under construction for the use onboard the “International Space Station (ISS)”: the “Sample Coupling Electronics (SCE)” and the “Oxygen Sensing and Control Unit (OSC)”. The SCE measures by a contactless, inductive method the electrical resistivity and the diameter of a spherical levitated metallic droplet by evaluating the voltage and electrical current applied to the levitation coil. The necessity of the OSC comes from the insight that properties like surface tension or, eventually, viscosity cannot seriously be determined by the oscillating drop method in the EML facility without knowing the conditions of the surrounding atmosphere. In the following both measurement devices are explained and laboratory test results are presented.

Published
2012

35. Experimental measurement of surface tension of Cu-Ti liquid alloys+

Author

Amore S., Brillo J., and Egry I.

Subjects
Electromagnetic levitation, Oscillating drop method, Surface tension, Surface properties, Cu-Ti liquid binary alloys, Liquid metal systems
Abstract

Export | Download | More... High Temperatures - High Pressures Volume 40, Issue 3-4, 2011, Pages 225-235 Experimental measurement of surface tension of Cu-Ti liquid alloys+ (Conference Paper) Amore, S.ab , Brillo, J.a, Egry, I.a a Institut für Materialphysik im Weltraum, Deutsches Zentrum für Luft- und Raumfahrt (DLR), 51170 Köln, Germany b Istituto per L'Energetica e le Interfasi (IENI), Consiglio Nazionale Delle Ricerche (CNR), Via de Marini 6, 16149, Genova, Italy View references (35) Abstract The electromagnetic levitation technique (EML) has been successfully employed in order to levitate Cu-Ti binary alloys. A digital CMOS-camera (400 fps) recorded image sequences of oscillating liquid sample and surface tension has been determined by oscillating drop method from the analysis of the frequency spectra. Measurements have been performed for samples covering the entire composition range and values have been obtained in a broad temperature range. Some samples have also been undercooled. The surface tension can be described as a linear function of temperature with negative slopes ranging between 2.3 × 10-4 [Nm-1K-1] for pure copper and 1.7 × 10-4 [Nm-1K-1] for pure Ti. Moreover the surface tension at T = 1423 K has been calculated and it shows a monotonically increasing behavior with the increasing of the Ti atomic concentration in the alloys.

Published
2011

42. Structural Properties of Levitated Liquid Aluminum-based Alloys

Author

Pozdnyakova, I., Hennet, L., Mathiak, G., Brillo, J., Zanghi, D., Brun, J.-F., Brassamin, S., Bytchkov, A., Cristiglio, E., Veron, E., Matzen, G., Geandier, G., Thiaudiere, D., Moss, S.C., Egry, Ivan, and Price, D.L.

Subjects
Levitated Liquid Aluminum-based Alloys, Structural Properties
Published
2006

43. Phase separation of undercooled copper alloys

Author

Brillo, J., Egry, I., Herlach, D.M., Ratke, L., Kolbe, M., Chatain, D., Tinet, N., Antion, C., Battezzati, L., Curiotto, S., Johnson, E., Pryds, N., Deutsches Zentrum für Luft- und Raumfahrt [Köln] (DLR), Centre de recherche de la matière condensée et des nanosciences (CRMCN), Université de la Méditerranée - Aix-Marseille 2-Université Paul Cézanne - Aix-Marseille 3-Centre National de la Recherche Scientifique (CNRS), Politecnico di Torino = Polytechnic of Turin (Polito), University of Copenhagen = Københavns Universitet (KU), and University of Copenhagen = Københavns Universitet (UCPH)

Subjects
[PHYS.COND.CM-MS]Physics [physics]/Condensed Matter [cond-mat]/Materials Science [cond-mat.mtrl-sci], ComputingMilieux_MISCELLANEOUS
Abstract

International audience

Published
2005

44. Phase separation of Undercooled Copper Alloys

Author

Antion, C., Battezzati, L., Brillo, J., Chatain, D., Curiotto, S., Egry, Ivan, Herlach, D. M., Johnson, E., Kolbe, M., Pryds, N., and Ratke, L.

Subjects
Undercooled Copper Alloys
Published
2005

45. Undercooling and demixing of Cu-based alloys

Author

Kolbe, M., Brillo, J., Egry, I., Herlach, D.M., Ratke, L., Chatain, D., Tinet, N., Antion, C., Battezzati, L., Curiotto, S., Johnson, E., and Pryds, N.

Subjects
Unterkühlung von Materialien
Published
2005

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