In situ EC-AFM study of the effect of nanocrystals on the passivation and pit initiation in an Al-based metallic glass
In situ EC-AFM study of the effect of nanocrystals on the passivation and pit initiation in an Al-based metallic glass
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DOI：
10.1016/j.corsci.2014.02.005
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发表时间：
2014-06
影响因子：
8.3
通讯作者：
S. D. Zhang;Z. W. Liu;Zi Ming Wang;Jinxiu Wang
中科院分区：
文献类型：
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作者：
S. D. Zhang;Z. W. Liu;Zi Ming Wang;Jinxiu Wang
纳米晶对金属玻璃中点蚀萌生的影响是一个尚未解决的问题。利用原位电化学原子力显微镜（EC-AFM）研究了Al-Ni-Ce金属玻璃中钝化膜的形成和点蚀的产生。利用原子力显微镜（AFM）的相位成像技术，从非晶基体中识别出了α-Al纳米相。在钝化膜形成初期，由于电偶耦合作用，腐蚀产物Al（OH）3在α-Al纳米颗粒表面生成。腐蚀产物进入钝化膜后，改变了钝化膜的局部结构和成分，降低了钝化膜的稳定性。
The effect of nanocrystals on pit initiation in metallic glasses is an unresolved issue. The passive film formation and pit initiation in the Al–Ni–Ce metallic glass were investigated using in situ electrochemical atomic force microscope (EC-AFM). The α-Al nanophases were identified from the amorphous matrix based upon the phase imaging in the tapping mode AFM. In the early stage of the passive film formation, the corrosion products Al(OH)3formed on the α-Al nanoparticles due to the galvanic coupling. The corrosion products incorporated into the passive film changed the local structure and component of the passive film, lowering its stability.