Magnetostrictive improvement in Er-doped biodegradable Fe81Ga19 alloys manufactured by selective laser melting

• DOI: 10.1016/j.jmrt.2023.05.114
• Publication Date: 2023-05-16T08:16:28Z
• Authors: Chengde Gao; Hu Zou; Hao Pan; Cijun Shuai
• Keywords: Selective Laser Melting

In this study, rare earth Er was introduced into magnetostrictive Fe–Ga alloys by selective laser melting (SLM) technique for the first time in order to tailor microstructure and thereby properties. The results showed that rapid solidification of SLM process not only retained disorder phases but also promoted solid solution partial matrix which increased lattice parameters. Moreover, rest distributed at grain boundaries along temperature gradient prevented lateral expansion grains, leading columnar grains with preferred orientation {100} direction. Consequently, magnetostriction coefficient Er-doped Fe81Ga19 improved up 92 ppm an content 0.6 at.%, representing a 40% enhancement compared alloy. But excessive resulted formation GaEr intermetallic phase, adverse Ga–Ga pair structure magnetostriction. Fe81Ga19Er0.6 alloy presented acceptable cytocompatibility slightly accelerated degradation due galvanic corrosion between phase matrix. These findings indicated potential prepared as future implants biology medicine.