Soft Ferromagnetic Bulk Metallic Glass with Potential Self-Healing Ability

oleh: Parthiban Ramasamy, Mihai Stoica, Gabriel Ababei, Nicoleta Lupu, Jürgen Eckert

Format: Article
Diterbitkan: MDPI AG 2020-03-01

Deskripsi

A new concept of soft ferromagnetic bulk metallic glass (BMG) with self-healing ability is proposed. The specific [Fe<sub>36</sub>Co<sub>36</sub>B<sub>19.2</sub>Si<sub>4.8</sub>Nb<sub>4</sub>]<sub>100&#8722;x</sub>(Ga)<sub>x</sub> (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 &#181;m 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.