Co-Based Bulk Metallic Glasses with Good Soft-Magnetic Properties and High Strength

Abstract:

The thermal stability, glass-forming ability, soft-magnetic properties and mechanical properties of Co₄₆Fe_19+xB_22.5Si_5.5Nb_7–x (x=0–2) bulk metallic glasses were investigated. The 5.5 at% Nb addition was found to be effective in approaching alloy to a eutectic point, resulting in an increase in glass-forming ability. By copper mold casting, bulk metallic glass rods with diameters up to 5 mm were produced. Except for high glass-forming ability, the bulk metallic glasses also exhibit good soft-magnetic properties, i.e., low coercive force of 1.34–2.14 A/m, high effective permeability at 1 kHz of 2.26–3.06×10⁴, and high fractures strength (σ_f) of 4010–4460 MPa. This Co-based bulk metallic glass system with high strengths and excellent soft-magnetic properties is promising for future applications as a new functional material.

• Periodical: Materials Science Forum (Volume 898)
• Pages: 703-708
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.898.703
• Online since: June 2017
• Authors: Qi Kui Man*, Ya Qiang Dong, Chun Tao Chang, Xin Min Wang, Run Wei Li
• Keywords: Glass-Forming Ability, Magnetic Properties, Mechanical Properties, Metallic Glass

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