首页|(163015)Chemical characterization of Mg_(0.25)Mn_(0.75)-H(D) nanocomposites by Atom Probe Tomography (APT)
(163015)Chemical characterization of Mg_(0.25)Mn_(0.75)-H(D) nanocomposites by Atom Probe Tomography (APT)
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NSTL
Elsevier
Hydrogen (H)- and deuterium (D)-loaded Mg_(0.25)Mn_(0.75) nanocomposites were prepared by a ball-milling process and Atom Probe Tomography (APT) analyses were carried out in order to investigate the resultant nanostructure. Due to the immiscibility of the Mg-Mn system, non-uniform and interconnected Mg-rich domains with a thickness of several to 10 nm formed in both of the H- and D-loaded composites. Such complex morphology could be attributed to the severe cold-rolling effects induced by ball-milling. The inhomogeneous distribution of D observed by the APT analysis is likely the result of severe lattice distortion and multiple defects, which are cold-rolling effects. While the detection of D in the D-loaded composite was hampered significantly by the desorption of D during specimen preparation, D remained around the boundary of the Mg-rich domains/Mn-rich matrix. This suggests that the modulated intermixing of immiscible Mg and Mn atoms together with the ball-milling effect results in a disordered atomic arrangement around the boundary. This is assumed to be one of the contributing factors in the destabilization of Mg hydride observed in our previous works.
Department of Materials Science, Tokai University, Kitakaname 4-1-1, Hiratsuka, Kanagawa 259-1292, Japan
Energy Process Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba West, 16-1 Onogawa, Tsukuba, Ibaraki 305-8569, Japan
Karlsruhe Nano Micro Facility (KNMF), Karlsruhe Institute of Technology, Eggenstein-Leopoldshafen, Germany
NSTL
Elsevier
