TY - JOUR
T1 - The hydrogen absorption-desorption performances of Mg-Co-X ternary alloys with BCC structure
AU - Zhang, Yao
AU - Tsushio, Yoshinori
AU - Enoki, Hirotoshi
AU - Akiba, Etsuo
N1 - Funding Information:
This work is supported by The New Energy and Industrial Technology Development Organization (NEDO) under “Basic Technology Development Project for Hydrogen Safety and Utilization”.
PY - 2005/5/3
Y1 - 2005/5/3
N2 - To improve hydrogenation properties of Mg-Co binary alloys that were developed by the present authors, ternary Mg50Co45X 5 alloys (X = Fe, Cu and Pd) were synthesized by ball milling. The formation of the BCC phase in the ternary alloys was verified by means of a XRD Rietveld analysis and TEM observation. The BCC lattice parameters of Mg 50Co45X5 (X = Fe, Cu and Pd) were found to be smaller than that of Mg50Co50. Fe addition to Mg 50Co50 alloy improved the hydrogen absorption capacity to 2.59 mass% at 373 K. The Pd and Cu added alloys showed a desorption isotherm for which the desorption capacity was up to 0.2 mass% at 373 K in the pressure range of 0.01-5.0 MPa. In situ DSC measurements revealed that the hydrogen absorption and desorption reactions of all the ternary alloys studied were reversible at the first thermal cycle. A series of ternary Mg 50Co50-yCuy (y = 5, 7, 9, 10) BCC alloys were synthesized by ball milling. It was found that Mg50Co 41Cu9 had the highest hydrogen absorption content (2.0 mass%) among these alloys at 373 K, while it desorbed 0.3 mass% hydrogen at the same temperature under vacuum.
AB - To improve hydrogenation properties of Mg-Co binary alloys that were developed by the present authors, ternary Mg50Co45X 5 alloys (X = Fe, Cu and Pd) were synthesized by ball milling. The formation of the BCC phase in the ternary alloys was verified by means of a XRD Rietveld analysis and TEM observation. The BCC lattice parameters of Mg 50Co45X5 (X = Fe, Cu and Pd) were found to be smaller than that of Mg50Co50. Fe addition to Mg 50Co50 alloy improved the hydrogen absorption capacity to 2.59 mass% at 373 K. The Pd and Cu added alloys showed a desorption isotherm for which the desorption capacity was up to 0.2 mass% at 373 K in the pressure range of 0.01-5.0 MPa. In situ DSC measurements revealed that the hydrogen absorption and desorption reactions of all the ternary alloys studied were reversible at the first thermal cycle. A series of ternary Mg 50Co50-yCuy (y = 5, 7, 9, 10) BCC alloys were synthesized by ball milling. It was found that Mg50Co 41Cu9 had the highest hydrogen absorption content (2.0 mass%) among these alloys at 373 K, while it desorbed 0.3 mass% hydrogen at the same temperature under vacuum.
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U2 - 10.1016/j.jallcom.2004.10.011
DO - 10.1016/j.jallcom.2004.10.011
M3 - Article
AN - SCOPUS:16344374326
VL - 393
SP - 185
EP - 193
JO - Journal of Alloys and Compounds
JF - Journal of Alloys and Compounds
SN - 0925-8388
IS - 1-2
ER -