Zr–Ti–Al–Fe–Cu bulk metallic glasses for biomedical device application
Kaiming Han, Hui Jiang, Yingmin Wang, Jianbing Qiang
Abstract
Abstract A series of Zr 63.5− x Ti x Al 9 Fe 4.5 Cu 23 ( x = 0, 1.5, 3.0, 4.5, 6.0; at%) bulk metallic glasses (BMGs) were designed and produced by means of copper mold suction casting. The effect of Ti addition on the glass‐forming ability (GFA) and mechanical properties of Zr 63.5− x Ti x Al 9 Fe 4.5 Cu 23 alloys was first investigated. The glass‐forming ability and room‐temperature plasticity of BMGs increase first and then reduced with Ti content increasing. At x = 3.0, the Zr 60.5 Ti 3 Al 9 Fe 4.5 Cu 23 BMG showed a critical glass formation diameter of 10 mm and excellent room‐temperature compressive plasticity ( ɛ P = 4.7%) by using the samples with dimensions of Φ3 mm × 6 mm. Meanwhile, the BMG also showed better biocompatibility and biocorrosion resistance compared with Ti6Al4V alloy. Under the imitated human body condition, the corrosion current density ( I corr ) of BMG was 6.61 × 10 –10 A·cm −2 , which is two orders of magnitude lower than that of conventional Ti6Al4V alloy. Moreover, the CCD‐986sk cell viabilities are, respectively, 65.4% and 46.6% on the BMG and Ti6Al4V alloy, indicating better biocompatibility of BMG. The Zr 60.5 Ti 3 Al 9 Fe 4.5 Cu 23 BMG with larger GFA, excellent mechanical properties, biocompatibility and biocorrosion resistance is considered as a potential material in biomedical device fields.