Acta Metallurgica Sinica (English Letters) ›› 2018, Vol. 31 ›› Issue (6): 584-590.DOI: 10.1007/s40195-018-0702-z

Special Issue: 2018年腐蚀专辑

• Orginal Article • Previous Articles     Next Articles

Design of Fe-Mn-Ag Alloys as Potential Candidates for Biodegradable Metals

Ruo-Yu Liu1, Ran-Gan He1, Li-Qun Xu1, Sheng-Feng Guo1()   

  1. 1 Faculty of Materials and Energy, Southwest University,Chongqing 400715, China
  • Received:2017-10-06 Revised:2017-12-21 Online:2018-06-10 Published:2018-05-31

Abstract:

In this work, a series of biodegradable pure iron, Fe-30Mn and Fe-30Mn-Ag alloys were developed by using a rapid solidification technology. A fine α-Fe dendrite was formed in pure iron, resulting in a high compressive yield strength of above 300 MPa. The Fe-30Mn alloy doped with only 1% Ag exhibited a significant increase in the degradation rate in simulated body fluid due to the precipitation of Ag-rich particles in alloy matrix and the induction of the microgalvanic corrosion. In addition, the novel Fe-30Mn-Ag alloy also exhibited a good magnetic compatibility and offered a closely approaching requirement for biodegradable medical applications.

Key words: Biodegradable metals, Fe-based alloys, Corrosion rate, Magnetic compatibility