Abstract
Results of a study of the hydrides of Zr 65Pd 35 and Zr 67Pd 33 metallic glasses are presented. It was found that these alloys absorb hydrogen at temperatures ranging from 150°C to 225°C to a final hydrogen concentration of Zr 67Pd 33H ≈95. X-ray diffraction, density measurements, and measurements of electrical resistivity and superconducting transition temperature were carried out on these samples. Results of NMR studies of amorphous Zr 67Pd 33H ≈95 alloys as well as the corresponding single-phase crystalline hydrides Zr 2PdH 1.94 and Zr 2PdH 2.90 are also reported. The amorphous hydrides exhibit enhanced hydrogen mobility, compared with the corresponding crystalline hydrides, as determined by motional line narrowing (T 2 ∗ measurements) of the NMR spectra. The apparent activation energy for diffusion in the amorphous hydride was studied by both T 2 ∗ and T 1 π measurements over an extended temperature range and found to depend strongly on temperature. Proton Knight shift and spin-lattice relaxation time measurements suggest that the electronic density of states at E F is significantly lower in the amorphous hydride than in the corresponding crystalline hydride.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
