Investigation on the thermodynamic analysis, preparation and characterization of LaNi5 - hydrogen storage alloy by magnesiothermic reduction diffusion process
The present investigation focuses on the preparation of LaNi5 intermetallic compound by “Metallothermic reduction diffusion process”. Experiments were carried out using oxides and chlorides of La and Ni metal powders as the raw materials with granular Mg powder as the reductant. The thermal...
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| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
University of Belgrade, Technical Faculty, Bor
2016-01-01
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| Series: | Journal of Mining and Metallurgy. Section B: Metallurgy |
| Subjects: | |
| Online Access: | http://www.doiserbia.nb.rs/img/doi/1450-5339/2016/1450-53391600015G.pdf |
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| Summary: | The present investigation focuses on the preparation of LaNi5 intermetallic
compound by “Metallothermic reduction diffusion process”. Experiments were
carried out using oxides and chlorides of La and Ni metal powders as the raw
materials with granular Mg powder as the reductant. The thermal reduction
process was carried out at 900 ºC for 9 hrs in Ar atmosphere. After the
completion of reaction, the contents were purified by treating with dilute
acetic acid followed by de-ionized water. Thermodynamic feasibility studies
were carried out to determine the probabilistic nature of formation of the
desired compound. Thermal analysis was carried out to find the dissociation
and decomposition temperature of the reactants. The phase purity and the
elemental composition of the alloy were assessed by XRD and EDX analyses. The
morphological features of the prepared powders were examined by SEM. From
this study, it has been concluded that LaNi5 alloy can be prepared with an
appreciable purity by the Metallothermic reduction diffusion process. |
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| ISSN: | 1450-5339 2217-7175 |