Results 211 to 220 of about 395,568 (271)
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Materials Science and Engineering: R: Reports, 1995
Abstract The microstructure formation, during casting, of alloys being immiscible in the liquid state such as copperlead or aluminium-lead has gained renewed scientific and technical interest during the last fifteen years. Especially, a new experimental tool, research under reduced gravity conditions, was able to cast new, unexpected results and ...
Ratke, L., Diefenbach, S.
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Abstract The microstructure formation, during casting, of alloys being immiscible in the liquid state such as copperlead or aluminium-lead has gained renewed scientific and technical interest during the last fifteen years. Especially, a new experimental tool, research under reduced gravity conditions, was able to cast new, unexpected results and ...
Ratke, L., Diefenbach, S.
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Solidification in immiscible alloys
Advances in Space Research, 1993Abstract Low-gravity processing of immiscible alloys is usually associated with an attempt to prevent sedimentation of the higher density liquid phase in order to form a dispersed microstructure. However, there are many factors in addition to gravity level which can influence the structures produced.
J.B. Andrews +4 more
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Mechanically driven alloying of immiscible elements
Physical Review Letters, 1992We report on the formation by mechanical alloying of fcc solid solution of Fe and Cu, which are immiscible. Intense codeformation of Cu with Fe and other high-melting bcc metals generates small fragments with tip radii of the order 1 nm such that capillary pressures force the atoms on these fragments to dissolve.
, Yavari, , Desré, , Benameur
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Microgravity Solidification of Immiscible Alloys
MRS Proceedings, 1998AbstractThis paper covers findings obtained from the microgravity directional solidification of immiscible aluminum-indium alloys during the Life and Microgravity Spacelab Mission in 1996. Three alloys, one of monotectic composition and two alloys containing an excess of indium above the monotectic (i.e., hypermonotectic compositions) were solidified ...
J. B. Andrews +3 more
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Rapid solidification of immiscible alloys
Journal of Magnetism and Magnetic Materials, 2003Abstract Immiscible alloys have been rapidly solidified for the preparation of granular materials with giant magnetoresistance properties. Au-based (Au–Co and Au–Fe) and Cu-based (Cu–Co and Cu–Fe) systems have been investigated. Single supersaturated solid solution has been obtained for Au–Fe, whereas three FCC solid solutions with different Co ...
E. BOSCO +2 more
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A nanoglass alloying immiscible Fe and Cu at the nanoscale
Nanoscale, 2015Synthesized from ultrafine particles with a bottom-up approach, nanoglasses are of particular importance in pursuing unique properties. From different kinds of nanoglasses with immiscible metals, nanoglass alloys are created, which may open an avenue to an entirely new world of solid solutions.
Chen, N. +7 more
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Microstructure Evolution in Rapidly Solidified Immiscible Alloys
Materials Science Forum, 2006We prepared Al-Bi alloys with our new aerogel counter gravity casting facility and Al-Pb alloys by simple mould casting with variable cooling rates. By counter gravity casting, it is possible to have directional solidification with flat isotherms and without forced melt flow during the casting process. Both methods allow studying the nucleation rate in
Schmidt-Hohagen, Frank +2 more
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Compositional patterning in irradiated immiscible alloys
Surface Science, 2002Abstract The spontaneous formation of surface compositional patterning of quenched binary alloys driven by irradiation is numerically studied by means of a phenomenologically modified Cahn–Hilliard type equation for the local concentration field. In the present model the irradiation effect is modeled as a ballistic mixing with an average distance of ...
Yoshihisa Enomoto, Masataka Sawa
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Mechanical Alloying of Immiscible Elements
1992We propose for the first time, a quantitative thermodynamic explanation for the formation of solid-solutions of immiscible elements by mechanical alloying. It is shown how codeformation of a hard and a soft phase results in the formation of disc or needle shape particles possessing large aspect ratios.
A. R. Yavari, P. J. Desre
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