Improved corrosion resistance and cytocompatibility of magnesium alloy by two-stage cooling in thermal treatment

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• 作者：Ying Zhao^a ; ^b ; Guosong Wu^b ; Jiang Jiang^b ; Hoi Man Wong^a ; Kelvin W.K. Yeung^a ; ^{wkkyeung@hku.hk} ; Paul K. Chu^b ; ^{paul.chu@cityu.edu.hk}
• 关键词：A. Magnesium ; B. EIS ; B. Polarization ; C. Interfaces
• 刊名：Corrosion Science
• 出版年：2012
• 期刊代码：28_0010938x
• 类别：ch
• 出版时间：June, 2012
• 卷：59
• 期：Complete
• 页码：360-365
• 文件大小：1222 K

摘要

A two-stage post-solution cooling procedure including 90 min of furnace cooling and subsequent water quenching is used to modify the morphology and distribution of the 尾-phase in magnesium-aluminum-zinc alloy. After this special process, the original coarse particle-like 尾-phase disappears and large-area fine lamellar (伪 + 尾) precipitates emerge. Dissolution of the coarse 尾-phase reduces the galvanic effects and produces the Al-rich 伪-phase matrix, whereas precipitation of the fine lamellar (伪 + 尾) micro-constituent forms a large number of almost continuous 尾-phase barrier. The microstructural change enhances the bio-corrosion resistance and cytocompatibility of magnesium alloy.