Discovering a new MgH₂ metastable phase.

ABSTRACT: Formation of a new metastable fcc-MgH₂ nanocrystalline phase upon mechanically-induced plastic deformation of MgH₂ powders is reported. Our results have shown that cold rolling of mechanically reacted MgH₂ powders for 200 passes introduced severe plastic deformation of the powders and led to formation of micro-lathes consisting of γ- and β-MgH₂ phases. The cold rolled powders were subjected to different types of defects, exemplified by dislocations, stacking faults, and twinning upon high-energy ball milling. Long term ball milling (50 hours) destabilized β-MgH₂ (the most stable phase) and γ-MgH₂ (the metastable phase), leading to the formation of a new phase of face centered cubic structure (fcc). The lattice parameter of f

SUBMITTER: El-Eskandarany MS 

PROVIDER: S-EPMC9085899 | biostudies-literature | 2018 Sep

REPOSITORIES: biostudies-literature