Influence of structural relaxation and partial devitrification on the corrosion resistance of Fe{sub 78}B{sub 13}Si{sub 9} amorphous alloy
- Federal Univ. of Sao Carlos (Brazil). Dept. of Materials Engineering
Amorphous alloys obtained by rapid solidification from the melt exhibit a similar structure to those observed in the liquid state, i.e., without long range ordering, in such a way that the constituents of the alloy usually are randomly and homogeneously distributed. Amorphous alloys, depending on their composition, may exhibit interesting characteristics such as very soft magnetic properties and improved resistance to corrosion. The high corrosion resistance of these alloys is attributed mainly to a higher rate of dissolution of passivating elements in the amorphous state. In addition, amorphous alloys are chemically homogeneous and free of defects such as grain boundaries, precipitates and segregation, which are favorable sites for corrosion. The corrosion resistance of amorphous alloys also depends on their thermal history. Several authors have reported that structural changes, such as structural relaxation and devitrification caused by annealing, change significantly the corrosion properties of these alloys. The purpose of this paper is to study corrosion resistance of the amorphous FeBSi alloy and the effects of structural changes such as structural relaxation and partial crystallization caused by annealing.
- OSTI ID:
- 634757
- Journal Information:
- Scripta Materialia, Vol. 39, Issue 3; Other Information: PBD: 3 Jul 1998
- Country of Publication:
- United States
- Language:
- English
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