Journal
PROGRESS IN NATURAL SCIENCE-MATERIALS INTERNATIONAL
Volume 24, Issue 2, Pages 116-120Publisher
ELSEVIER SCIENCE INC
DOI: 10.1016/j.pnsc.2014.03.004
Keywords
Bulk metallic glasses; Thermal stability; Glass-forming ability; Crystallization; Soft magnetic properties
Funding
- Fundamental Research Funds for the Central Universities of China [N120402001]
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Fe62Co8-xMxZr6Nb4Ge1B19 (M=Mo, Cr) bulk metallic glasses were synthesized in the diameter range up to 2 mm by copper mold casting, which exhibit high thermal stability and large glass-forming ability. The super-cooled liquid region diminishes by the dissolution of Mo. The addition of 2 at% Cr leads to the broading of the liquid region remarkably, resulting in the improvement of thermal stability. The crystallization takes place through a single exothermic reaction, accompanying the precipitation of more than three kinds of crystallized phases such as alpha-Fe, Fe2Zr and ZrB2. The Fe-based alloys show soft ferromagnetic properties. The saturation magnetization (sigma(s)) decreases with increasing Mo or Cr content while the saturated magnetostriction increases with raising Mo or Cr content. There is no evident change in the sigma(s) and coercive force (H-c) with annealing temperature below the crystallization temperature, which suggests a more relaxed atomic configuration the glasses have. The crystallization causes a substantial enhancement in both sigma(s). and H-c. Each soft magnetic property of the glasses containing Cr with higher thermal stability is superior to that of the alloys containing Mo. (C) 2014 Chinese Materials Research Society. Production and hosting by Elsevier B.V. All rights reserved.
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