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Composition design for Laves phase-related body-centered cubic-V solid solution alloys with large hydrogen storage
1State Key Laboratory of Materials Modification, Dalian University of Technology, Dalian 116024, People's Republic of China.
Summary
This study identifies optimal alloy compositions for high hydrogen storage capacity using the cluster line approach. These alloys, based on Laves phase structures, are predicted by the cluster-plus-glue-atom model.
Area of Science:
- Materials Science
- Solid-State Chemistry
- Hydrogen Storage Technology
Background:
- Laves phase alloys (AB2) are known for hydrogen storage.
- Understanding local atomic structures is key to designing new materials.
- Ternary alloy systems offer complex solid solution possibilities.
Purpose of the Study:
- To analyze alloy compositions with high hydrogen storage capacity in Laves phase-related body-centered cubic (bcc) solid solutions.
- To apply the cluster line approach to predict hydrogen storage properties.
- To validate the cluster-plus-glue-atom model for these systems.
Main Methods:
- Utilized the cluster line approach to model ternary alloy systems (e.g., Ti-Cr-V).
- Constructed cluster lines based on the A(6)B(7) icosahedral cluster characteristic of Laves phases.
- Investigated alloy compositions near the cluster line and their relation to the cluster-plus-glue-atom model.
Main Results:
- Identified alloy compositions with large hydrogen storage capacities located near the constructed cluster line.
- Demonstrated that alloys satisfying the cluster-plus-glue-atom model exhibit desirable properties.
- Observed varying structures and hydrogen storage capacities in (Ti(6)Cr(7))(100-x)V(x) alloys with increasing V content.
Conclusions:
- The cluster line approach effectively guides the search for high-capacity hydrogen storage alloys.
- The cluster-plus-glue-atom model provides a predictive framework for alloy design.
- Specific bcc solid solution alloys like (Ti(6)Cr(7))(95)V(5) and Ti(30)Cr(40)V(30) show promise for hydrogen storage applications.
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