Degradation Characters of La-Mg-Ni-Based Metal Hydride Alloys: Corrosion and Pulverization Behaviors
| العنوان: | Degradation Characters of La-Mg-Ni-Based Metal Hydride Alloys: Corrosion and Pulverization Behaviors |
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| المؤلفون: | Yiming Li, Yanghuan Zhang, Hui-ping Ren |
| المصدر: | Acta Metallurgica Sinica (English Letters). 31:723-734 |
| بيانات النشر: | Springer Science and Business Media LLC, 2018. |
| سنة النشر: | 2018 |
| مصطلحات موضوعية: | Materials science, Hydride, Metallurgy, Alloy, Metals and Alloys, 02 engineering and technology, engineering.material, 010402 general chemistry, 021001 nanoscience & nanotechnology, Electrochemistry, 01 natural sciences, Industrial and Manufacturing Engineering, 0104 chemical sciences, Corrosion, Metal, visual_art, Phase (matter), engineering, visual_art.visual_art_medium, Degradation (geology), 0210 nano-technology, Cycling |
| الوصف: | Degradation behaviors of three typical La-Mg-Ni alloys, La2MgNi9, La1.5Mg0.5Ni7 and La4MgNi19, were studied. La1.5Mg0.5Ni7 with (La,Mg)2Ni7 as main phase presents better discharge capacity and cycling stability. The three alloys suffer severe pulverization and corrosion after electrochemical cycles, which are considered to be the significant factor attributing to the capacity deterioration. However, the overall corrosion extent of the three cycled alloys aggravates successively, which is inconsistent with the result that La2MgNi9 presented poor cycling stability and also the assumption that alloy with high Mg content is easy to be corroded. The intrinsic anti-corrosion and anti-pulverization characteristics of the three alloys are mainly focused in this work. Immersion corrosion experiments demonstrate that the Mg-rich phases are more easily to be corroded. The corrosion resistance of the three alloys presents an improved trend which is inversely proportional to abundance of the Mg-rich phases. However, the anti-pulverization abilities present an inverse trend, which is closely related to the mechanical property of various phase structures. LaNi5 with the highest hardness is easy to crack, but the soft (La,Mg)Ni2 is more resistant to crack formation and spreading. Thus, the weaker corrosion of La2MgNi9 after electrochemical cycling is attributed to the better intrinsic anti-pulverization capability though the anti-corrosion is poor. As La4MgNi19 possesses excellent corrosion resistance, enhancement of the anti-pulverization ability is urgent for improvement in the cycling stability. |
| تدمد: | 2194-1289 1006-7191 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_________::6146b1757909c8dc1ec3df91c3e8df2e https://doi.org/10.1007/s40195-017-0696-y |
| حقوق: | OPEN |
| رقم الأكسشن: | edsair.doi...........6146b1757909c8dc1ec3df91c3e8df2e |
| قاعدة البيانات: | OpenAIRE |
Find this article in full text from Springer Verlag. | تدمد: | 21941289 10067191 |
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