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Title: The effect of metallic elements on the crystallization behavior of amorphous Fe-Si-B alloys

Abstract

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.

Authors:
 [1]
  1. Ehime Univ., Matsuyama (Japan). Dept. of Materials Science and Engineering
Publication Date:
Sponsoring Org.:
USDOE
OSTI Identifier:
413278
Resource Type:
Journal Article
Journal Name:
Metallurgical and Materials Transactions. A, Physical Metallurgy and Materials Science
Additional Journal Information:
Journal Volume: 27; Journal Issue: 11; Other Information: PBD: Nov 1996
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; IRON BASE ALLOYS; CRYSTALLIZATION; SILICON ALLOYS; BORON ALLOYS; NIOBIUM ALLOYS; ZIRCONIUM ALLOYS; VANADIUM ALLOYS; COPPER ALLOYS; SAMPLE PREPARATION; MELTING; CHEMICAL COMPOSITION; CALORIMETRY; TRANSMISSION ELECTRON MICROSCOPY; TEMPERATURE DEPENDENCE; AGING; GRAIN SIZE; DENDRITES

Citation Formats

Naohara, T. The effect of metallic elements on the crystallization behavior of amorphous Fe-Si-B alloys. United States: N. p., 1996. Web. doi:10.1007/BF02595435.
Naohara, T. The effect of metallic elements on the crystallization behavior of amorphous Fe-Si-B alloys. United States. doi:10.1007/BF02595435.
Naohara, T. Fri . "The effect of metallic elements on the crystallization behavior of amorphous Fe-Si-B alloys". United States. doi:10.1007/BF02595435.
@article{osti_413278,
title = {The effect of metallic elements on the crystallization behavior of amorphous Fe-Si-B alloys},
author = {Naohara, T},
abstractNote = {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.},
doi = {10.1007/BF02595435},
journal = {Metallurgical and Materials Transactions. A, Physical Metallurgy and Materials Science},
number = 11,
volume = 27,
place = {United States},
year = {1996},
month = {11}
}