The Prognostication Possibility of Some Magnetic Properties for Dielectrics on the Basis of Covalency Parameters of Ligand-Cation Bonds

1989 ◽  
Vol 155 (1) ◽  
pp. 249-255 ◽  
Author(s):  
O. A. Bayukov ◽  
A. F. Savitskii
Author(s):  
A.R. Pelton ◽  
A.F. Marshall ◽  
Y.S. Lee

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.


Author(s):  
June D. Kim

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.


1997 ◽  
Vol 90 (3) ◽  
pp. 407-413
Author(s):  
MARC KELEMEN ◽  
CHRISTOPH WACHTER ◽  
HUBERT WINTER ◽  
ELMAR DORMANN ◽  
RUDOLF GOMPPER ◽  
...  

1998 ◽  
Vol 08 (PR2) ◽  
pp. Pr2-111-Pr2-114 ◽  
Author(s):  
P. Vojtaník ◽  
E. Komová ◽  
R. Varga ◽  
R. Matejko ◽  
R. Grössinger ◽  
...  

1998 ◽  
Vol 08 (PR2) ◽  
pp. Pr2-445-Pr2-448 ◽  
Author(s):  
A. G. Ravlik ◽  
S. T. Roschenko
Keyword(s):  

1998 ◽  
Vol 08 (PR2) ◽  
pp. Pr2-27-Pr2-30
Author(s):  
L. Malkinski ◽  
A. Slawska-Waniewska ◽  
R. Zuberek ◽  
A. Wisniewski ◽  
H. K. Lachowicz ◽  
...  

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