scholarly journals Magnetic properties and paleointensities as function of depth in a Hawaiian lava flow

2014 ◽  
Vol 15 (4) ◽  
pp. 1096-1112 ◽  
Author(s):  
Lennart V. de Groot ◽  
Mark J. Dekkers ◽  
Martijn Visscher ◽  
Geertje W. ter Maat
Keyword(s):  
Magnetic Properties ◽  
Lava Flow ◽  
Hawaiian Lava

Cooling rate of an active Hawaiian lava flow from nighttime spectroradiometer measurements

1992 ◽  
Vol 19 (17) ◽  
pp. 1783-1786 ◽  
Author(s):  
Luke P. Flynn ◽  
Peter J. Mouginis-Mark
Keyword(s):  
Lava Flow ◽  
Cooling Rate ◽  
Hawaiian Lava

Variations of magnetic properties in thin lava flow profiles: Implications for the recording of the Laschamp Excursion

2012 ◽  
Vol 200-201 ◽  
pp. 10-27 ◽  
Author(s):  
Christian Vérard ◽  
Roman Leonhardt ◽  
Michael Winklhofer ◽  
Karl Fabian
Keyword(s):  
Magnetic Properties ◽  
Lava Flow ◽  
Flow Profiles ◽  
Laschamp Excursion

Morella cerifera invasion and nitrogen cycling on a lowland Hawaiian lava flow

2007 ◽  
Vol 10 (1) ◽  
pp. 19-24 ◽  
Author(s):  
Erin L. Kurten ◽  
Carolyn P. Snyder ◽  
Terri Iwata ◽  
Peter M. Vitousek
Keyword(s):  
Nitrogen Cycling ◽  
Lava Flow ◽  
Morella Cerifera ◽  
Hawaiian Lava

AEM analysis of crystallization in Ti-based amorphous alloys

1983 ◽  
Vol 41 ◽  
pp. 270-271
Author(s):  
A.R. Pelton ◽  
A.F. Marshall ◽  
Y.S. Lee
Keyword(s):  
Magnetic Properties ◽  
Amorphous Alloys ◽  
Amorphous Materials ◽  
Isothermal Annealing ◽  
Amorphous Matrix ◽  
Nucleation And Growth ◽  
Current Interest ◽  
Amorphous Films ◽  
Electrical And Magnetic Properties

Amorphous materials are of current interest due to their desirable mechanical, electrical and magnetic properties. Furthermore, crystallizing amorphous alloys provides an avenue for discerning sequential and competitive phases thus allowing access to otherwise inaccessible crystalline structures. Previous studies have shown the benefits of using AEM to determine crystal structures and compositions of partially crystallized alloys. The present paper will discuss the AEM characterization of crystallized Cu-Ti and Ni-Ti amorphous films.Cu60Ti40: The amorphous alloy Cu60Ti40, when continuously heated, forms a simple intermediate, macrocrystalline phase which then transforms to the ordered, equilibrium Cu3Ti2 phase. However, contrary to what one would expect from kinetic considerations, isothermal annealing below the isochronal crystallization temperature results in direct nucleation and growth of Cu3Ti2 from the amorphous matrix.

Microstructure in soft magnetic E3 (S1, Al) (Sendust) alloys

1988 ◽  
Vol 46 ◽  
pp. 770-771
Author(s):  
June D. Kim
Keyword(s):  
Electron Microscopy ◽  
Magnetic Properties ◽  
Ternary Phase Diagram ◽  
Vertical Tube ◽  
Vacuum Induction Melting ◽  
Induction Melting ◽  
Soft Magnetic ◽  
Quenching Temperature ◽  
Thin Foils ◽  
Vertical Tube Furnace

Iron-base alloys containing 8-11 wt.% Si, 4-8 wt.% Al, known as “Sendust” alloys, show excellent soft magnetic properties. These magnetic properties are strongly dependent on heat treatment conditions, especially on the quenching temperature following annealing. But little has been known about the microstructure and the Fe-Si-Al ternary phase diagram has not been established. In the present investigation, transmission electron microscopy (TEM) has been used to study the microstructure in a Sendust alloy as a function of temperature.An Fe-9.34 wt.% Si-5.34 wt.% Al (approximately Fe3Si0.6Al0.4) alloy was prepared by vacuum induction melting, and homogenized at 1,200°C for 5 hrs. Specimens were heat-treated in a vertical tube furnace in air, and the temperature was controlled to an accuracy of ±2°C. Thin foils for TEM observation were prepared by jet polishing using a mixture of perchloric acid 15% and acetic acid 85% at 10V and ∼13°C. Electron microscopy was performed using a Philips EM 301 microscope.

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