The effect of ball milling and equal channel angular pressing on the hydrogen absorption/desorption properties of Mg–4.95 wt% Zn–0.71 wt% Zr (ZK60) alloy
By V. Skripnyuk, E. Rabkin, Yuri Estrin, R. Lapovok. 2004
192 citations recorded by the source corpus.
The microstructure of commercial alloy ZK60 (Mg–4.95 wt% Zn–0.71 wt% Zr) was refined by equal channel angular pressing (ECAP), high energy ball milling (HEBM) and by a combination of both methods. The effect of microstructure refinement on the hydrogenation properties of ZK60 was studied. The alloy processed by a combination of ECAP and HEBM was found to exhibit the highest rate of hydrogen desorption at 300 °C and the final pressure of 2 atm in the desorption volume. Similar, but slightly slower, desorption kinetics was observed for the alloy processed by ECAP alone. The desorption times for 5.2 wt% of H2 were 20 and 26 min for the alloys processed by combined ECAP/HEBM and by ECAP alone, respectively. The hydrogen absorption capacity at 300 °C of the alloy processed by combined ECAP/HEBM was 6.2 wt% of H2. The pressure–composition–temperature diagrams of this alloy in the temperature range of 280–350 °C were determined. The enthalpy and entropy of hydrogen absorption/desorption were 76.8 kJ/mol and 141.8 J/mol K, respectively. No pressure hysteresis with regard to hydrogen absorption/desorption was found for the alloys processed by combined ECAP and HEBM. This hydrogenation behavior was correlated with the microstructure of bulk samples and the morphology of dehydrogenated powders observed by transmission electron microscopy and high resolution scanning electron microscopy.
Subfields: Biomaterials, Materials Chemistry
View Paper: https://www.semanticscholar.org/paper/84496dfbe1f0e36741a8712a75fcda56486781cd
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In Biomaterials
- Terence G. Langdon
- R. Valiev
- Z. Horita
- Yuntian Zhu
- Yuri Estrin
- Michael Zehetbauer
- C. J. Webb
- M. Dornheim
In Materials Chemistry
- Yuntian Zhu
- Terence G. Langdon
- R. Valiev
- Z. Horita
- Yuri Estrin
- K. Edalati
- Michael Zehetbauer
- I. Ovid’ko
Citations in the corpus
- Review of magnesium hydride-based materials: development and optimisation (2016, background): “lower, and it has fewer safety concerns [48].”
- Fundamentals of Superior Properties in Bulk NanoSPD Materials (2016, background): “Hydrogen storage kinetics showing high performance of ECAP-processed ZK60 alloy compared to its ball-milled counterpart (desorption,[104,105]).”
- High-pressure torsion of TiFe intermetallics for activation of hydrogen storage at room temperature with heterogeneous nanostructure (2013, background): “The hardness level at the saturation is as high as ~1050 Hv and it is the highest reported in SPD-processed materials [14-41].”
- Materials for hydrogen-based energy storage – past, recent progress and future outlook (2019, background): “[46] Skripnyuk VM, Rabkin E, Estrin Y, Lapovok R.”