Formation and bioactivation of Zr-Al-Co bulk metallic glasses
Formation and bioactivation of Zr-Al-Co bulk metallic glasses
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DOI：
10.1557/jmr.2009.0348
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发表时间：
2009-09
影响因子：
2.7
通讯作者：
T. Wada;F. Qin;Xin-min Wang;M. Yoshimura;A. Inoue;N. Sugiyama;Rieko Ito;N. Matsushita
中科院分区：
文献类型：
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作者：
T. Wada;F. Qin;Xin-min Wang;M. Yoshimura;A. Inoue;N. Sugiyama;Rieko Ito;N. Matsushita
在Zr-Al-Co三元系中发现了一种无铜、无镍的高非晶形成能力的锆基非晶合金。共晶合金可浇铸成直径达18 mm的玻璃柱状棒材。在模拟体液中，玻璃状合金具有较高的拉伸断裂强度(1830 Mpa)和较低的杨氏模数(83 Gpa)，同时具有较好的耐腐蚀性。在5M-NaOH水溶液中进行水热-电化学处理后，在非晶态的Zr56Al16Co28合金表面形成了无定形的钴酸盐层。合金表面自发生成羟基磷灰石，表明表面改性后具有生物活性。一种临界直径大于1 cm的无铜、无镍的锆基金属玻璃的发现，加上优异的力学性能、优异的耐腐蚀性和良好的生物活性，可能会开辟生物材料的应用领域。
A Cu- and Ni-free Zr-based metallic glass with high glass-forming ability was found in the Zr-Al-Co ternary system. The eutectic Zr56Al16Co28 alloy could be cast into glassy cylindrical rods with diameters up to 18 mm. The glassy alloy exhibited high tensile fracture strength of 1830 MPa and low Young’s modulus of 83 GPa in conjunction with better corrosion resistance compared with the glassy Zr57Nb5Al10Ni12.6Cu15.4 in a simulated body fluid. Hydrothermal-electrochemical treatment in the aqueous 5M-NaOH solution resulted in the formation of amorphous sodium cobaltate layer on the surface of glassy Zr56Al16Co28 alloy. Hydroxyapatite was spontaneously formed on the surface of the alloy, indicating bioactivity after surface modification. The discovery of a Cu- and Ni-free Zr-based metallic glass with a critical diameter larger than 1 cm in conjunction with excellent mechanical properties, superior corrosion resistance, and good bioactivity may open up the application field as biomaterials.