TY - JOUR
T1 - Hydrogenation of Zr-based metallic glasses and quasicrystals
AU - Zander, D.
AU - Leptien, H.
AU - Köster, U.
AU - Eliaz, N.
AU - Eliezer, D.
N1 - Funding Information:
This work was supported by the Deutsche Forschungsgemeinschaft (DFG Ko 668/22-1). One of us (N.E.) is grateful to the Israel Ministry of Science for the financial support through Eshkol Grant no. 2206-0587 for Scientific Infrastructures. The authors are indebted to cand.ing. H. Torwesten for his help in the hydrogenation experiments.
PY - 1999/8/1
Y1 - 1999/8/1
N2 - Zr-based metallic glasses and quasicrystals were electrochemically charged with hydrogen. Hydrogen absorption/desorption as well as the influence of hydrogen on the formation and stability of quasicrystals were studied by means of X-ray diffraction, electron microscopy, differential scanning calorimetry (DSC) and thermal desorption analysis (TDA). In Zr69.5Cu12Ni11Al7.5 absorption kinetics and storage capacity were found to be better for the quasicrystalline than for the associated amorphous phase. Dissolved hydrogen was observed to play an important role not only in the stability of the quasicrystals, but also in their formation from glassy precursor material. Even hydrogen contents as low as 5 at.% changed the formation as well as the decomposition of the icosahedral quasicrystals: the formation was shifted to higher temperatures whereas decomposition temperatures were lowered. At larger hydrogen contents, changes in both transformations were observed, yet not fully understood.
AB - Zr-based metallic glasses and quasicrystals were electrochemically charged with hydrogen. Hydrogen absorption/desorption as well as the influence of hydrogen on the formation and stability of quasicrystals were studied by means of X-ray diffraction, electron microscopy, differential scanning calorimetry (DSC) and thermal desorption analysis (TDA). In Zr69.5Cu12Ni11Al7.5 absorption kinetics and storage capacity were found to be better for the quasicrystalline than for the associated amorphous phase. Dissolved hydrogen was observed to play an important role not only in the stability of the quasicrystals, but also in their formation from glassy precursor material. Even hydrogen contents as low as 5 at.% changed the formation as well as the decomposition of the icosahedral quasicrystals: the formation was shifted to higher temperatures whereas decomposition temperatures were lowered. At larger hydrogen contents, changes in both transformations were observed, yet not fully understood.
UR - http://www.scopus.com/inward/record.url?scp=0345073214&partnerID=8YFLogxK
U2 - 10.1016/S0022-3093(99)00200-8
DO - 10.1016/S0022-3093(99)00200-8
M3 - Conference article
AN - SCOPUS:0345073214
SN - 0022-3093
VL - 250-252 (II)
SP - 893
EP - 897
JO - Journal of Non-Crystalline Solids
JF - Journal of Non-Crystalline Solids
T2 - Proceedings of the 1998 10th International Conference on Liquid and Amorphous Metals (LAM-10)
Y2 - 30 August 1998 through 4 September 1998
ER -