Hydridic, thermodynamic and kinetic properties of Hf(2)Ni intermetallic phase

作者：Stojic Dragica Lj^*; Kumric Sandra V; Belosevic Cavor Jelena N; Radakovic Jana S; Cekic Bozidar Dj; Mentus Slavko V

来源：International Journal of Hydrogen Energy, 2009, 34(9): 3764-3770.

DOI：10.1016/j.ijhydene.2009.02.055

• Hf(2)Ni
• Hydriding isotherm
• Hydriding capacity
• XRD
• SEM
• Activation energy
• (APW plus lo) method

The intermetallic compound Hf(2)Ni was the subject of investigations by several methods. The relative stability was checked by calculating its enthalpy and cohesive properties, using the augmented plane wave plus local orbitals (APW lo) method of ab initio calculations. The kinetics of hydrogen absorption in this compound was investigated in the temperature range from 573 to 823 K, under the constant hydrogen pressure of 1 bar. The obtained rate constants, k (s(-1)), and hydriding capacities (H/M) are as follows: 0.00038 (0.69), 0.00131 (0.95), 0.00246 (1.13) and 0.0042 (0.92) for temperatures 573, 673, 723 and 823 K, respectively. The changes in crystal structure and morphology caused by multiple hydriding/dehydriding cycles were followed by XRD and SEM.

• 出版日期2009-5