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Indexed by:期刊论文

Date of Publication:2010-08-01

Journal:16th International Symposium on Metastable, Amorphous and Nanostructured Materials

Included Journals:SCIE、EI、CPCI-S、Scopus

Volume:504

Issue:SUPPL. 1

Page Number:S129-S131

ISSN No.:0925-8388

Key Words:Metallic glass; Glass transition; Fe-based alloy; Glass-forming ability; Magnetic property

Abstract:A two-stage-like glass transition phenomenon attenuated gradually with an increase in Co content in (Fe(1-y)Co(y))(67.5)Nb(4)Gd(3.5)B(25) (y = 0.1-0.5) glassy alloys, and disappeared for the alloy with y = 0.5, resulting in a large supercooled liquid region of 102 K. As the Co content increases, the liquidus temperature decreases gradually, and the reduced glass transition temperature increases, indicating the enhancement of glass-forming ability (GFA). The best GFA was obtained for alloy with y = 0.5, and the full glassy sample with a diameter of 5 mm could be fabricated by copper mold casting. The (Fe, Co)-Nb-Gd-B glassy alloys exhibited good soft magnetic properties, i.e., rather high saturation magnetization of 0.86-0.91 T, low coercive force below 5.0 A/m, and low saturated magnetostriction of 6-13x10(-6). In addition, the glassy alloys also possessed very high compressive fracture strength of 3821-4112 MPa and high Vickers hardness of 1028-1065. (C) 2010 Elsevier B.V. All rights reserved.