Soft Ferromagnetic Bulk Metallic Glass with Potential Self-Healing Ability

Parthiban Ramasamy; Mihai Stoica; Gabriel Ababei; Nicoleta Lupu; Jürgen Eckert

doi:10.3390/ma13061319

Soft Ferromagnetic Bulk Metallic Glass with Potential Self-Healing Ability

Materials (Basel). 2020 Mar 14;13(6):1319. doi: 10.3390/ma13061319.

Authors

Parthiban Ramasamy¹, Mihai Stoica², Gabriel Ababei³, Nicoleta Lupu³, Jürgen Eckert^{1

4}

Affiliations

¹ Erich Schmid Institute of Materials Science, Austrian Academy of Sciences, Jahnstraße 12, Leoben A-8700, Austria.
² Laboratory of Metal Physics and Technology, Department of Materials, ETH Zurich, 8093 Zurich, Switzerland.
³ National Institute of Research and Development for Technical Physics, 47 Mangeron Boulevard, RO-700050 Iaşi, Romania.
⁴ Department of Materials Science, Chair of Materials Physics, Montanuniversität Leoben, Jahnstraße 12, Leoben A-8700, Austria.

Abstract

A new concept of soft ferromagnetic bulk metallic glass (BMG) with self-healing ability is proposed. The specific [Fe₃₆Co₃₆B_19.2Si_4.8Nb₄]_100-x(Ga)_x (x = 0, 0.5, 1 and1.5) BMGs prepared by copper mold casting were investigated as a function of Ga content. The Ga-containing BMGs still hold soft magnetic properties and exhibit large plastic strain of 1.53% in compression. Local melting during shearing produces molten droplets of several µm size throughout the fracture surface. This concept of local melting during shearing can be utilized to produce BMGs with self-healing ability. The molten regions play a vital role in deflecting shear transformation zones, thereby enhancing the mechanical properties.

Keywords: bulk metallic glasses; doping; mechanical properties; self-healing; thermal stability.

Abstract

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