Electrochemical and Corrosion Behavior of Nanocrystalline TiNi-Based Alloys and Composite |
| M. Balcerzak and M. Jurczyk
Institute of Materials Science and Engineering, Poznań University of Technology, pl. M. Skłodowskiej-Curie 5, 60-965 Poznań, Poland |
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| In this work TiNi-based nanocrystalline alloys and composite were produced by mechanical alloying process with subsequent annealing at 750°C for 0.5 h. Mechanical alloying was performed in a SPEX 8000 Mixer Mill. TiNi alloy was chemically modified by Ag elemental powder. Silver content equaled 5 wt%. X-ray diffraction analyses revealed formation of TiNi main phase after annealing. Additionally, two minor phases Ti2Ni and TiNi3 were detected for unmodified alloy. Crystallites of obtained powders were nanosized. Corrosion and electrochemical measurements were performed in 6 M KOH solution. All synthesized materials were used as negative electrode for Ni-MHx batteries. Ag addition positively affects on stability of discharge capacity of TiNi alloy during of charge/discharge tests. |
DOI: 10.12693/APhysPolA.126.888 PACS numbers: 82.47.Cb, 88.30.rd |