Department of Materials and Optoelectronic Science, National Sun Yat-Sen University, Kaohsiung 804, Taiwan, ROC.
Mater Sci Eng C Mater Biol Appl. 2013 Oct;33(7):4183-7. doi: 10.1016/j.msec.2013.06.007. Epub 2013 Jun 13.
The bio-electrochemical response in simulated body fluid of the Zr53Cu30Ni9Al8 metallic glasses with different degrees of partial crystallization was systematically examined and discussed. Through thermal annealing, the volume fractions of the crystalline phases are determined to be 0, 34, 63, and near 100%. Based on the bio-corrosion voltage and current, as well as the polarization resistance, it is concluded that the fully amorphous alloy exhibits the highest bio-electrochemical resistance. With an increasing degree of partial crystallization, the corrosion resistance becomes progressively degraded. The passive current reveals that the fully amorphous metallic glasses can form a more protective and denser passive film on the metallic glass surface. The formation of reactive nanocrystalline phases in the amorphous matrix would reduce the bio-corrosion resistance.
系统地研究和讨论了不同程度部分晶化的 Zr53Cu30Ni9Al8 金属玻璃在模拟体液中的生物电化学响应。通过热退火，确定了结晶相的体积分数分别为 0、34、63 和接近 100%。基于生物腐蚀电压和电流以及极化电阻，得出完全非晶合金表现出最高的生物电化学阻抗的结论。随着部分结晶程度的增加，耐腐蚀性逐渐降低。通过对被动电流的研究表明，完全非晶态金属玻璃可以在金属玻璃表面形成更具保护性和更致密的钝化膜。非晶基体中反应性纳米晶相的形成会降低生物耐腐蚀性。
