Quantitative phase analysis from powder diffraction using de Rietveld method in hydrogen storage alloys based on TiCr

[摘要] Hydrogen storage is one of the important steps in the implementation of the hydrogen economy; metal hydrides are a promising way to achieve this goal. We present in this work the use of Rietveld analysis to characterize structurally TiCr-based alloys that are able to store hydrogen. TiCruV09, TiCrL1V0.45Nb0.45, TiCr1.1V0.2Nb0.8, TiCr1.1Nb0.9alloys were synthesized in an arc furnace under argon atmosphere. The analysis of phases was developed by X-Ray Diffraction (XRD) for further refinement of both the two lattice parameters and the percentage of the phases. Our results confirmed that a structure bcc, mostly combined with a small percentage of Laves phases, leads to obtain important properties in this area. Rietveld analysis was performed by the Fullprof program and this program allows us to obtain the different structural parameters.

[发布机构] Universidad de Santander, Bucaramanga, Colombia^1;Foundation of Researchers in Science and Technology of Materials, Colombia^2

[效力级别] 化学

[关键词] Arc furnaces;Argon atmospheres;Hydrogen economy;Laves phasis;Metal hydrides;Powder diffraction;Quantitative phase analysis;Structural parameter