Title :
Surface crystallization of amorphous alloy Metglas 2826
Author :
Pregger, B.A. ; Kramer, J.J.
Author_Institution :
Dept. of Electr. Eng., Delaware Univ., Newark, DE, USA
fDate :
9/1/1989 12:00:00 AM
Abstract :
A study of the surface region of the amorphous alloy Metglas 2826 was made using reflection high-energy electron diffraction and Auger electron spectroscopy. Changes in the near surface structure and composition as a result of heat treatment were followed and compared with observations made with transmission electron microscopy (TEM) and X-ray diffraction. Treatment of the surface in an ultraviolet radiation/ozone environment at room temperature to remove absorbed carbon results in surface oxidation, a subsurface crystalline layer, and a varying composition in the near-surface region. Samples thinned to the point where the two surfaces were in close proximity exhibited explosive crystallization behavior when observed in the TEM. The fact that surface-induced crystallization has been shown to occur in this alloy at low and even room temperatures suggests that environmental and mechanical treatments are of some consequence in the practical utilization of this type of material
Keywords :
X-ray crystallography; X-ray diffraction examination of materials; crystallisation; magnetic properties of amorphous substances; reflection high energy electron diffraction; transmission electron microscope examination of materials; AES; Auger electron spectroscopy; RHEED; TEM; X-ray diffraction; amorphous alloy Metglas 2826; composition; heat treatment; near surface structure; reflection high-energy electron diffraction; room temperatures; subsurface crystalline layer; surface crystallisation; surface-induced crystallization; Amorphous magnetic materials; Amorphous materials; Crystallization; Electrons; Reflection; Spectroscopy; Surface structures; Surface treatment; Temperature; X-ray diffraction;
Journal_Title :
Magnetics, IEEE Transactions on
