Identifying the role of nanoscale heterogeneities in pitting behaviour of Al-based metallic glass

Identifying the role of nanoscale heterogeneities in pitting behaviour of Al-based metallic glass
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确定纳米级不均匀性在铝基金属玻璃点蚀行为中的作用

DOI:
10.1016/j.corsci.2011.05.047
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发表时间:
2011-09
期刊:
影响因子:
8.3
通讯作者:
Wang, J. Q.
Wang, J. Q.
中科院分区:
材料科学1区
文献类型:
--
作者:
Zhang, S. D.;Wang, Z. M.;Chang, X. C.;Hou, W. L.;Wang, J. Q.

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为了阐明al基金属玻璃中纳米非均质性与腐蚀的关系,通过熔体淬火直接获得了三种模型合金,它们分别具有单纳米α-Al、Al3Ni和al11ce3相嵌套在非晶Al-Ni-Ce合金基体中。结果表明:纳米晶α-Al的析出并未降低AM合金的抗点蚀性能;而相对于非晶态,由于析出纳米晶Al3Ni和al11ce3,点蚀电位略有降低,而相对于非晶态,点蚀电位明显降低。这种不同类型非均质材料的点蚀敏感性归因于纳米尺度的点蚀起爆事件。
To clarify the correlation of nanoscale heterogeneity with corrosion in Al-based metallic glasses, three model alloys with a single nanoscale α-Al, Al3Ni or Al11Ce3phase embedded in amorphous Al-Ni-Ce alloy matrix were obtained directly by melt quenching. The results indicated that the high pitting corrosion resistance of AM alloys was not deteriorated by nanocrystalline α-Al precipitation; whereas the pitting potential was slightly decreased and considerably reduced relative to their amorphous state due to the precipitation of nanocrystalline Al3Ni or Al11Ce3respectively. Such a pitting sensitivity of different types of heterogeneities attributes to the nano-scale pit initiation events.
DOI: 10.1016/b978-0-12-633670-2.50006-1
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