The effect of metallic elements on the crystallization behavior of amorphous Fe-Si-B alloys
- Ehime Univ., Matsuyama (Japan). Dept. of Materials Science and Engineering
The crystallization behavior of amorphous Fe{sub 84{minus}X}Si{sub 6}B{sub 10}M{sub X} (M = Nb, Zr, V, or Cu) alloys was examined using differential scanning calorimetry (DSC) and transmission electron microscopy (TEM) with the aim of clarifying the effect of additional M elements. The compositional dependence of the first crystallization temperature T{sub x1} increased in the order of Zr > Nb > V; however, the addition of 1 at. pct Cu caused a decrease in T{sub x1}. Such an effect of the M elements on the thermal stability of an amorphous phase was interpreted in terms of the difference in the atomic size. These alloys were composed of a mixed structure of {alpha}-Fe phase. However, their particles possessed dendritic morphology with a grain size of 0.1 to 0.3 {micro}m, when the Nb or Zr content was less than 2 at. pct. Further addition of these elements brought about the formation of spherical {alpha}-Fe particles. The average grain size, for instance, was as small as 20 nm in the aged alloy containing 6 at. pct Nb, which shows that a remarkable grain refinement occurs with increasing Nb content.
- Sponsoring Organization:
- USDOE
- OSTI ID:
- 413278
- Journal Information:
- Metallurgical and Materials Transactions. A, Physical Metallurgy and Materials Science, Vol. 27, Issue 11; Other Information: PBD: Nov 1996
- Country of Publication:
- United States
- Language:
- English
Similar Records
Nanocrystalline Fe-M-B-Cu (M=Zr, Nb) alloys with improved soft magnetic properties (abstract)
The role of Nb in the nanocrystallization of amorphous Fe-Si-B-Nb alloys