TY - JOUR
T1 - Synthesis and structural study of Ti-rich Mg-Ti hydrides
AU - Asano, Kohta
AU - Kim, Hyunjeong
AU - Sakaki, Kouji
AU - Page, Katharine
AU - Hayashi, Shigenobu
AU - Nakamura, Yumiko
AU - Akiba, Etsuo
N1 - Funding Information:
This work was partly supported by The New Energy and Industrial Technology Development Organization (NEDO) under “Advanced Fundamental Research on Hydrogen Storage Materials (Hydro-Star)”. This work was also partly supported by Iketani Science and Technology Foundation. Use of the Advanced Photon Source, an Office of Science User Facility operated for the US Department of Energy (DOE) Office of Science by Argonne National Laboratory, was supported by the US DOE under Contract No. DE-AC02-06CH11357.
PY - 2014/4/25
Y1 - 2014/4/25
N2 - MgxTi1-x (x = 0.15, 0.25, 0.35) alloys were synthesized by means of ball milling. Under a hydrogen pressure of 8 MPa at 423 K these Mg-Ti alloys formed a hydride phase with a face centered cubic (FCC) structure. The hydride for x = 0.25 consisted of single Mg 0.25Ti0.75H1.62 FCC phase but TiH2 and MgH2 phases were also formed in the hydrides for x = 0.15 and 0.35, respectively. X-ray diffraction patterns and the atomic pair distribution function indicated that numbers of stacking faults were introduced. There was no sign of segregation between Mg and Ti in Mg0.25Ti 0.75H1.62. Electronic structure of Mg 0.25Ti0.75H1.62 was different from those of MgH2 and TiH2, which was demonstrated by 1H nuclear magnetic resonance. This strongly suggested that stable Mg-Ti hydride phase was formed in the metal composition of Mg0.25Ti0.75 without disproportion into MgH2 and TiH2.
AB - MgxTi1-x (x = 0.15, 0.25, 0.35) alloys were synthesized by means of ball milling. Under a hydrogen pressure of 8 MPa at 423 K these Mg-Ti alloys formed a hydride phase with a face centered cubic (FCC) structure. The hydride for x = 0.25 consisted of single Mg 0.25Ti0.75H1.62 FCC phase but TiH2 and MgH2 phases were also formed in the hydrides for x = 0.15 and 0.35, respectively. X-ray diffraction patterns and the atomic pair distribution function indicated that numbers of stacking faults were introduced. There was no sign of segregation between Mg and Ti in Mg0.25Ti 0.75H1.62. Electronic structure of Mg 0.25Ti0.75H1.62 was different from those of MgH2 and TiH2, which was demonstrated by 1H nuclear magnetic resonance. This strongly suggested that stable Mg-Ti hydride phase was formed in the metal composition of Mg0.25Ti0.75 without disproportion into MgH2 and TiH2.
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U2 - 10.1016/j.jallcom.2014.01.061
DO - 10.1016/j.jallcom.2014.01.061
M3 - Letter
AN - SCOPUS:84893305568
SN - 0925-8388
VL - 593
SP - 132
EP - 136
JO - Journal of Alloys and Compounds
JF - Journal of Alloys and Compounds
ER -