Abstract：Novel Ti87-xZr7.5CuxCo2.5Sn2Si1 (x=39,40,42, atom fraction/%) bulk metallic glasses without highly toxic elements Ni and Be as well as noble elements were synthesized by copper mold casting, and their glass-forming ability, thermal stability, bio-corrosion behavior and mechanical properties were studied. The results show that the Ti-Zr-Cu-Co-Sn-Si metallic glasses possess high glass-forming ability and thermal stability, evidenced by the critical diameters of 2-3 mm and large supercooled liquid region of 44-51K. The Ti-Zr-Cu-Co-Sn-Si metallic glasses exhibit high bio-corrosion resistance in phosphate buffered saline (PBS) at 37℃. They are spontaneously passivated with wide passive region and low passive current density of about 3×10-2A/m2. The corrosion resistance is enhanced with the increase in Ti content in the metallic glass. The Ti-based bulk metallic glasses possess high compressive fracture strength up to 2309MPa and low elastic modulus of 92-100GPa.
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