Results 271 to 280 of about 128,460 (306)

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
openaire   +1 more source

Melt extraction from the mantle beneath spreading centers

Earth and Planetary Science Letters, 1991
Abstract Melt migration beneath a mid-oceanic spreading center must be rapid and it must focus melt to the narrow ridge axis. Porous flow models that neglect compaction of the matrix result in vertical melt flow, and can not account for melt focussing. We show that dilation, or decompaction, of the porous matrix creates a high-porosity boundary layer,
David W. Sparks, E.M. Parmentier
openaire   +1 more source

Tailored Magnetic Fields in the Melt Extraction of Metallic Filaments

Metallurgical and Materials Transactions B, 2008
Porous bodies that are resistant to corrosion at high temperatures and thermal shock may be produced from metallic fibers. In order to accomplish reasonable homogeneity and high porosity, the cross-sectional area of the fibers and the width of distribution thereof need to be small. This article studies two techniques for making fibers.
Cramer, A., Galindo, V., Gerbeth, G., Priede, J., Bojareviecs, A., Gelfgat, Y., Andersen, O., Kostmann, C., Stephani, G.   +8 more
openaire   +4 more sources

Melt extraction of short metallic filaments: Fibre formation process revisited

Journal of Materials Processing Technology, 2008
This article presents experimental results of the extraction of metallic fibres from the surface of a melt pool. A low-melting alloy was used in a model facility to produce filaments of equal length. Operational parameters such as wheel speed and feed rate were varied to yield thin fibres.
Cramer, A., Gerbeth, G.
openaire   +2 more sources

Garnet coalescence clogs melt extraction channels in migmatite

Lithos
Here we investigate the evolution of a focused melt extraction horizon exposed in lower crustal metapelites of the Serre Massif in Calabria (southern Variscan belt, Italy) and consider the effect of melt drainage on the rheology of the orogenic lower crust.
Festa, Vincenzo, Spiess, Richard, Tursi, Fabrizio   +2 more
openaire   +2 more sources

Physics of melt extraction: theory, implications and applications

Philosophical Transactions of the Royal Society of London. Series A: Physical and Engineering Sciences, 1993
This paper presents a general overview of flow in deformable porous media with emphasis on melt extraction processes beneath mid-ocean ridges. Using a series of simple model problems, we show that the equations governing magma migration have two fundamentally different modes of behaviour.
openaire   +1 more source

Dimensional variations in Newtonian-quenched metal ribbons formed by melt spinning and melt extraction

Journal of Applied Physics, 1979
The wavelengths and directions of dimensional variations in metal ribbons quenched by Newtonian cooling from the melt are estimated for the melt-spinning and the melt-extraction processes. The main sources of dimensional variation are the vibration and distortion of the melt puddle from which the ribbon is solidified and the variation of the Newtonian ...
T. R. Anthony, H. E. Cline
openaire   +1 more source

Discontinuos/episodic partial melt extraction from the melting region beneath the Mid Atlantic Ridge

2004
abstract
BRUNELLI, Daniele, M. Seyler, CIPRIANI, Anna, L. Ottolini, E. Bonatti   +4 more
openaire   +3 more sources

Calorimetric comparison of quench rates in melt spinning and melt extraction

Materials Science and Engineering, 1976
R.B. Pond, J.M. Winter
openaire   +1 more source

Extraction of plutonium by fluoride melts

Soviet Atomic Energy, 1970
G. P. Novoselov, I. N. Kashcheev, Yu. D. Dogaev   +2 more
openaire   +1 more source