Zr55.8Al19.4(Co1−xCu x )24.8 (x = 0–0.8 at.%) bulk metallic glasses for surgical devices applications
Zr–Al–Co–Cu bulk metallic glasses (BMGs) are promising surgical materials. By using the electron concentration criterion for BMG composition design, a series of Zr55.8Al19.4(Co1−xCu x )24.8 (x = 0–0.8 at.%) alloys were produced, of which BMG rod samples with different diameters were made by copper mold casting. Among these alloys, the Zr55.8Al19.4Co17.36Cu7.44 BMG exhibited a centimeter-scale glass formation size (dmax = 12 mm), an ultrahigh strength (σy = 2.04 GPa), a large room-temperature plasticity (εp = 4.0%), and a fracture toughness (KQ = 120 MPa m1/2), as well as good corrosion resistance in phosphate-buffered solution. The attainment of the combination of properties as large glass-forming ability with excellent mechanical and corrosion stability would suit the surgical devices applications.
KeywordsZr–Al–Co–Cu Bulk metallic glass Biomedical material Mechanical property
This work was supported by the National Natural Science Foundation of China (51671045), the Science Challenge Project (TZ2016004), the Fundamental Research Funds for the Central Universities (DUT16ZD209), the National Magnetic-Confinement Fusion Science Program of China (2013GB107003 and 2015GB105003), and the Nuclear Energy Development Project (H660003-13-02).
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