Synthesis and structural study of Ti-rich Mg-Ti hydrides
- NIAIST
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 Mg0.25Ti0.75H1.62 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 Mg0.25Ti0.75H1.62. Electronic structure of Mg0.25Ti0.75H1.62 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.
- Research Organization:
- Argonne National Lab. (ANL), Argonne, IL (United States). Advanced Photon Source (APS)
- Sponsoring Organization:
- FOREIGN
- OSTI ID:
- 1120053
- Journal Information:
- Journal of Alloys and Compounds, Vol. 593, Issue 04, 2014; ISSN 0925-8388
- Publisher:
- Elsevier
- Country of Publication:
- United States
- Language:
- ENGLISH
Similar Records
Stacking faults and mechanisms strain-induced transformations of hcp metals (Ti, Mg) during mechanical activation in liquid hydrocarbons
Influence of composition modification on Ca{sub 0.5−x}Mg{sub x}Ti{sub 2}(PO{sub 4}){sub 3} (0.0 ≤ x ≤ 0.5) nanoparticles as electrodes for lithium batteries