Results 261 to 270 of about 36,116 (299)

Production of dental alloy by the melt extraction technique

Journal of Materials Science, 1978
Filaments of a commercial dental alloy (Ag3Sn) have been produced using the technique of pendant drop melt extraction. The filaments are 50 μm in diameter with a mean grain size of 5μm. Both the mechanical and structural properties of these wires have been determined to show that the results are consistent with those predicted in a previous study on ...
J. V. Wood, S. C. King
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Melt-extracted oxide ceramic fibres — the fundamentals

Journal of Materials Science, 1996
A melt-extraction technique, using a sharpened molybdenum wheel, has been used to produce fine oxide ceramic fibres. Wetting of the molybdenum wheel by molten ceramic is a key parameter in the melt-extraction process. Two types of fibre are generally obtained, depending on the extraction speed.
M. Allahverdi, R. A. L. Drew, J. O. Strom-Olsen   +2 more
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A model involving amphibolite lower crust melting and subsequent melt extraction for leucogranite generation

GSA Bulletin, 2021
Abstract In the southern Tibetan Plateau, leucogranites are dominantly distributed in the Himalayan orogenic belt with minor occurrences in the southern Lhasa subterrane. In this paper, we report the first Miocene Anglonggangri leucogranites in the northern Lhasa subterrane.
Liqiang Wang, Wenbin Cheng, Teng Gao, Yong Wang   +3 more
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Crustal melting and melt extraction, ascent and emplacement in orogens: mechanisms and consequences

Journal of the Geological Society, 2007
Significant volume of wet melting requires an influx of H 2 O-rich volatile phase. In hydrate-breakdown melting, initial melt accumulation is diffusion-controlled and melt accumulates around peritectic phases in low-pressure sites.
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The importance of melt extraction for tracing mantle heterogeneity

Geochimica et Cosmochimica Acta, 2009
Numerous isotope and trace element studies of mantle rocks and oceanic basalts show that the Earth’s mantle is heterogeneous. The isotopic variability in oceanic basalts indicates that most mantle sources consist of complex assemblages of two or more components with isolated long-term chemical evolution, on both global and local scales.
Andreas Stracke, Bernard Bourdon
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Fine metallic and ceramic fibers by melt extraction

Materials Science and Engineering: A, 1994
Abstract Techniques are described for the fabrication of metal and ceramic fibers of diameter below 20 μm by a method of melt extraction. The process is containerless and has been successfully applied to reactive metals and high temperature ceramics. The properties of the fibers, where exceptional, are reviewed.
J.O. Ström-Olsen, G. Rudkowska, P. Rudkowski, M. Allahverdi, R.A.L. Drew   +4 more
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Volume change during partial melting reactions: implications for melt extraction, melt geochemistry and crustal rheology

Tectonophysics, 2001
Abstract The volume change associated with dehydration melting has been investigated experimentally in muscovite and biotite-bearing assemblages because it is a possible driving force for melt segregation during orogenesis. Experiments have been performed on cores of a muscovite+biotite-bearing pelite and on a biotite+plagioclase+quartz gneiss.
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Partial melting, partial melt extraction and partial back reaction in anatectic migmatites

Lithos, 2001
Abstract Anatectic migmatites commonly show both prograde (entropy producing) and retrograde reactions between minerals and melt. The final textures, mineral modes and mineral chemistries are affected by four successive processes: (i) prograde partial melting and small-scale segregation into melt-rich domains and restitic domains; (ii) partial melt ...
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Preparation of Rapidly Cooled Fibers by Melt Extraction

Metallurgist, 2013
Preparation of rapidly cooled fibers by extraction of a suspended melt droplet is considered. A model of fiber crystallization on a crystallizer disk is proposed. Fiber cross section calculated and experimental data are compared.
V. N. Antsiferov, A. S. Nechaev
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Trace Element Geochemical Effects of Integrated Melt Extraction and ‘Shaped’ Melting Regimes

Journal of Petrology, 1995
Abstract The mixing (integration) of liquids obtained as different mass fractions of partial melting from source material of the same bulk composition, travelling along different mantle flow-lines through a melting regime, can result in deficiencies in the relative concentrations of those incompatible elements whose bulk distribution ...
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