TY - JOUR
T1 - Phase relations and hydrogenation behavior of Sr(Al1-xMg x)2
AU - Zhang, Q. A.
AU - Akiba, E.
N1 - Funding Information:
This work was carried out as a part of the ‘WE-NET’ project. Q.A. Zhang would like to thank the New Energy and Industrial Technology Development Organization (NEDO) of Japan for providing the NEDO fellowship. The authors thank Dr H. Enoki of the National Institute of Advanced Industrial Science and Technology of Japan for technical assistance.
PY - 2003/10/6
Y1 - 2003/10/6
N2 - The phase relations and hydrogenation behavior of Sr(Al 1-xMgx)2 alloys were studied. The pseudobinary C36-type Laves phase Sr(Al,Mg)2 was found as a structural intermediate between the Zintl phase and the C14 Laves phase. The single-phase regions for the Zintl phase, C36 phase and C14 phase, were determined to be x=0-0.10, 0.45-0.68 and 0.80-1, respectively. The Mg-substituted Zintl phase Sr(Al0.95Mg0.05)2 can be hydrogenated to Sr(Al,Mg)2H2 at about 473 K. However, the Sr(Al,Mg) 2H2 directly decomposes into SrH2 and Sr(Al,Mg)4 starting at 513 K. When the temperature is 573 K, the C36 Laves phase Sr(Al0.5Mg0.5)2 can be hydrogenated into SrMgH4 and Al, while the C14 Laves phase Sr(Al 0.1Mg0.9)2 is hydrogenated into SrMgH 4, Mg17Al12 and Mg.
AB - The phase relations and hydrogenation behavior of Sr(Al 1-xMgx)2 alloys were studied. The pseudobinary C36-type Laves phase Sr(Al,Mg)2 was found as a structural intermediate between the Zintl phase and the C14 Laves phase. The single-phase regions for the Zintl phase, C36 phase and C14 phase, were determined to be x=0-0.10, 0.45-0.68 and 0.80-1, respectively. The Mg-substituted Zintl phase Sr(Al0.95Mg0.05)2 can be hydrogenated to Sr(Al,Mg)2H2 at about 473 K. However, the Sr(Al,Mg) 2H2 directly decomposes into SrH2 and Sr(Al,Mg)4 starting at 513 K. When the temperature is 573 K, the C36 Laves phase Sr(Al0.5Mg0.5)2 can be hydrogenated into SrMgH4 and Al, while the C14 Laves phase Sr(Al 0.1Mg0.9)2 is hydrogenated into SrMgH 4, Mg17Al12 and Mg.
UR - https://www.scopus.com/pages/publications/0141746357
UR - https://www.scopus.com/pages/publications/0141746357#tab=citedBy
U2 - 10.1016/S0925-8388(03)00320-7
DO - 10.1016/S0925-8388(03)00320-7
M3 - Article
AN - SCOPUS:0141746357
SN - 0925-8388
VL - 360
SP - 143
EP - 150
JO - Journal of Alloys and Compounds
JF - Journal of Alloys and Compounds
IS - 1-2
ER -