Ti–Zr–Cu–Fe–Sn–Si–Ag–Ta bulk metallic glasses with good corrosion resistance as potential biomaterials

• Published in: Rare metals 2020-06, Vol.39 (6), p.688-694
• Main Authors: Liu, Ying, Wang, Hao-Jie, Pang, Shu-Jie, Zhang, Tao
• Format: Article
• Language: English
• Subjects: Amorphous materials; Biocompatibility; Biomaterials; Biomedical materials; Chemistry and Materials Science; Compressive strength; Copper; Corrosion potential; Corrosion resistance; Energy; Fracture strength; Iron; Materials Engineering; Materials Science; Mechanical properties; Metallic glasses; Metallic Materials; Modulus of elasticity; Nanoscale Science and Technology; Physical Chemistry; Pitting (corrosion); Plastic deformation; Silver; Sodium chloride; Surgical implants; Tantalum; Tin; Titanium base alloys; Zirconium
• ISSN: 1001-0521; 1867-7185
• DOI: 10.1007/s12598-018-1124-9

Ti 47 Cu 38− x Zr 7.5 Fe 2.5 Sn 2 Si 1 Ag 2 Ta x ( x  = 1–4; at%, the same below) bulk metallic glasses (BMGs) with good bio-corrosion resistance and mechanical properties were fabricated by copper mold casting. Critical diameter of the Ti-based BMGs with 1 at%–4 at% Ta was 3 mm. The Ta-incorporated Ti-based BMGs exhibit higher open current potential and parallel passive current density in comparison with those of Ti–6Al–4V alloy in 0.9 wt% NaCl and Hank’s solution, implying their good corrosion resistance. The pitting corrosion potential of the Ti-based BMGs gradually increases up to about 1.25 V with Ta addition increasing up to 4 at% in 0.9 wt% NaCl solution. Among the present Ti-based BMGs, the alloy bearing 2 at% Ta exhibits the optimal integration of mechanical properties, including the compressive fracture strength exceeding 2000 MPa, relative low Young’s modulus of 98 GPa, plastic strain of 3.4% and high hardness of HV 599. The Ta-bearing Ti-based bulk metallic glasses with integration of relative high GFA, good mechanical properties and high bio-corrosion resistance are beneficial for biomedical applications.