A New Ti-Zr-Cu-Si Amorphous Alloy with Excellent Biocompatibility

Abstract:

A new Ti-based amorphous alloy Ti₃₅Zr₂₁Cu₄₀Si₄ with about 80 μm thickness and 5~8 mm width was fabricated by melt spinning method. The phase structure and thermal stabilities of the Ti₃₅Zr₂₁Cu₄₀Si₄ amorphous alloy were investigated by the X-ray diffraction (XRD) and differential scanning calorimetry (DSC), respectively. The Ti₃₅Zr₂₁Cu₄₀Si₄ amorphous alloy was cultivated in the simulate body fluid (SBF) for 15 days. And the blood compatibility was evaluated by dynamic clotting time and hemolysis rate test. The Ti₃₅Zr₂₁Cu₄₀Si₄ alloy exhibits fully amorphous phase and high thermal stability with a supercooled liquid region (ΔT_x) of 80K. The Ca phosphates depositions on alloy surfaces were gained after 15 days. Moreover, n (Ca)/n (P) atom ratio of the deposition is about 1.65/1, which approaches to that of human bone 1.66/1, suggesting that the Ti₃₅Zr₂₁Cu₄₀Si₄ amorphous alloy is with an excellent biocompatibility. The Ti₃₅Zr₂₁Cu₄₀Si₄ amorphous ribbon has lower hemolysis ratio of 0.562%, which can reduce wrecking degree of erythrocytes, compared with medical standards of the hemolysis rate (less than 5%). These are favorable for application to biomaterials.

• Periodical: Advanced Materials Research (Volumes 791-793)
• Pages: 435-439
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.791-793.435
• Online since: September 2013
• Authors: Zhong Yuan Suo, Jian Jun Chen, Yan Ling Song, Ke Qiang Qiu
• Keywords: Amorphous Alloy, Biomaterial, Ti-Zr-Cu-Si

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