Effect of Ti substitution on the microstructure and properties of Zr-Mn-V-Ni-AB[inf 2] type hydride electrode alloys
نویسندگان
چکیده
The electrochemical capacity, hydrogen absorbed/desorbed activation properties of alloy Zr(Mn0.1V0.3Ni0.6)2 were improved after Ti substitution for the Zr. The microstructure of Zr12xTixsMn0.1V0.3Ni0.6d2 sx 0, 0.5d alloys was analyzed by x-ray diffraction (XRD), transmission electron microscopy (TEM), and energy dispersive spectrum (EDS) analysis. A systematic structural analysis shows that there are two phases in the Ti-substituted alloy of Zr0.5Ti0.5(Mn0.1V0.3Ni0.6)2: C14 Laves phase and Ti-containing “premartensite” R phase of Ti0.8Zr0.2Ni. The improvement of electrochemical properties of alloy Zr(Mn0.1V0.3Ni0.6)2 after Ti substitution can be attributed to the Ti substitution for Zr sites in C14 Laves phase, the formation of Ti0.8Zr0.2Ni R-phase, and disappearance of Zr–Ni binaries.
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