![](/images/graphics-bg.png)
Effects of Magnesium Content on Structure and Electrochemical Properties of La-Mg-Pr-Al-Mn-Co-Ni Hydrogen Storage Alloys
Joint Authors
Zarpelon, L. M. C.
Banczek, E. P.
Lima, N. B.
Faria, R. N.
Costa, Isolda
Martinez, Luis Gallego
Source
Advances in Materials Science and Engineering
Issue
Vol. 2018, Issue 2018 (31 Dec. 2018), pp.1-11, 11 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2018-02-08
Country of Publication
Egypt
No. of Pages
11
Abstract EN
The discharge capacity, microstructures, and corrosion resistance of some as-cast alloys represented by the formula La0.7−xMgxPr0.3Al0.3Mn0.4Co0.5Ni3.8, where x = 0.0, 0.1, 0.3, 0.5, and 0.7, were investigated by SEM/EDX, XRD, and electrochemical measurements.
The partial substitution of La by Mg refined the grain structure while the total substitution changed it from equiaxed to columnar.
Three phases were detected: a major phase (M), a grey phase (G), and a dark phase (D).
The compositions analyzed by EDX suggested that the M phase was close to a LaNi5 phase.
With the increase of the Mg content, the analyses revealed a G phase with composition close to a RMg2Ni9 (R = La,Pr) and a D phase close to a MgNi2 phase.
The XRD analysis and Rietveld refinement corroborated the EDX results.
The corrosion resistance of the alloys was evaluated in 6.0 mol·L−1 KOH solution, and the results showed that the substitution of La by Mg was beneficial for this alloy property.
Nevertheless, Mg addition was deleterious to the discharge capacity of the electrodes.
American Psychological Association (APA)
Zarpelon, L. M. C.& Banczek, E. P.& Martinez, Luis Gallego& Lima, N. B.& Costa, Isolda& Faria, R. N.. 2018. Effects of Magnesium Content on Structure and Electrochemical Properties of La-Mg-Pr-Al-Mn-Co-Ni Hydrogen Storage Alloys. Advances in Materials Science and Engineering،Vol. 2018, no. 2018, pp.1-11.
https://search.emarefa.net/detail/BIM-1122388
Modern Language Association (MLA)
Zarpelon, L. M. C.…[et al.]. Effects of Magnesium Content on Structure and Electrochemical Properties of La-Mg-Pr-Al-Mn-Co-Ni Hydrogen Storage Alloys. Advances in Materials Science and Engineering No. 2018 (2018), pp.1-11.
https://search.emarefa.net/detail/BIM-1122388
American Medical Association (AMA)
Zarpelon, L. M. C.& Banczek, E. P.& Martinez, Luis Gallego& Lima, N. B.& Costa, Isolda& Faria, R. N.. Effects of Magnesium Content on Structure and Electrochemical Properties of La-Mg-Pr-Al-Mn-Co-Ni Hydrogen Storage Alloys. Advances in Materials Science and Engineering. 2018. Vol. 2018, no. 2018, pp.1-11.
https://search.emarefa.net/detail/BIM-1122388
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1122388