Biodegradable Mg-Zn-Ca-Sr bulk metallic glasses with enhanced corrosion performance for biomedical applications
Biodegradable Mg-Zn-Ca-Sr bulk metallic glasses with enhanced corrosion performance for biomedical applications
复制标题
可生物降解的 Mg-Zn-Ca-Sr 大块金属玻璃，具有增强的腐蚀性能，适用于生物医学应用
DOI：
10.1016/j.matdes.2014.10.085
复制
发表时间：
2015-02-15
影响因子：
8.4
通讯作者：
Zhang, Tao
中科院分区：
文献类型：
--
作者：
Li, Haifei;Pang, Shujie;Zhang, Tao
镁合金具有良好的耐腐蚀性和良好的力学性能，是可生物降解材料的理想材料。本文在镁-锌-钙-锶合金体系中合成了新型可生物降解的镁基大块金属玻璃(BMG)。与镁锌钙基复合材料相比，掺入少量锶的镁锌钙锶基复合材料具有更好的非晶形成能力、更好的力学性能、更好的耐腐蚀性和可调性、更低的析氢量和相当的细胞相容性，显示了其作为生物可降解材料的潜在潜力。掺锶BMG的耐蚀性能的提高归因于合金表面含有较多的氢氧化锌/氧化物，并提出了一个简明的模型来解释Mg-Zn-Ca-Sr BMG的腐蚀机理。(C)2014爱思唯尔有限公司。保留所有权利。
Magnesium alloys with the integration of suitable corrosion behavior and good mechanical properties are desired for biodegradable materials. In this paper, novel biodegradable Mg-based bulk metallic glasses (BMGs) were synthesized in the Mg-Zn-Ca-Sr alloy system. Compared with the Mg-Zn-Ca BMG, the Mg-Zn-Ca-Sr BMGs with minor Sr incorporation possess improved glass-forming ability, better mechanical properties, enhanced and adjustable corrosion performance, reduced hydrogen evolution, and comparable cytocompatibility, indicating their promising potential to serve as biodegradable materials. The enhanced corrosion resistance of the Sr-incorporated BMGs is ascribed to the higher amount of the zinc hydroxide/oxide in the alloy surface, and a schematic model is proposed to illustrate the corrosion mechanisms of the Mg-Zn-Ca-Sr BMGs. (C) 2014 Elsevier Ltd. All rights reserved.