Microstructure of ball milled MgH2 powders upon hydrogen cycling: An electron microscopy study

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@article{9ca28fb29966465c899b6895cfc37d4c,
title = "Microstructure of ball milled MgH2 powders upon hydrogen cycling: An electron microscopy study",
abstract = "Microstructure of MgH2 powder particles milled for 5-60 h was studied after the powders were hydrogen cycled. Using electron microscopy we estimated individual grain size and particle size of cycled powders to compare with those before H-cycling. The nano-size grains were found to grow (3-10 times) whereas the particles undergo a mild refinement upon H-cycling. The most prominent grain growth was within the 1st dehydrogenation. The smaller grains in the milled powders demonstrated faster growth upon cycling. The average grain size estimated in this study for the cycled powders were >200 nm. The grain and particle size approached a regular or log-normal distribution with cycling. The lattice strain introduced in the milled MgH2 powders was significantly removed by cycling for less milled powders (milled for ",
keywords = "Hydrogen cycle, Magnesium hydride, Hydrogen energy, Ball milling, Microstructure, Electron microscopy",
author = "B Paik and Allan Walton and Vicky Mann and David Book and Ian Jones and Ivor Harris",
year = "2010",
month = sep,
day = "1",
doi = "10.1016/j.ijhydene.2010.05.059",
language = "English",
volume = "35",
pages = "9012--9020",
journal = "International Journal of Hydrogen Energy",
issn = "0360-3199",
publisher = "Elsevier",
number = "17",

}

RIS

TY - JOUR

T1 - Microstructure of ball milled MgH2 powders upon hydrogen cycling: An electron microscopy study

AU - Paik, B

AU - Walton, Allan

AU - Mann, Vicky

AU - Book, David

AU - Jones, Ian

AU - Harris, Ivor

PY - 2010/9/1

Y1 - 2010/9/1

N2 - Microstructure of MgH2 powder particles milled for 5-60 h was studied after the powders were hydrogen cycled. Using electron microscopy we estimated individual grain size and particle size of cycled powders to compare with those before H-cycling. The nano-size grains were found to grow (3-10 times) whereas the particles undergo a mild refinement upon H-cycling. The most prominent grain growth was within the 1st dehydrogenation. The smaller grains in the milled powders demonstrated faster growth upon cycling. The average grain size estimated in this study for the cycled powders were >200 nm. The grain and particle size approached a regular or log-normal distribution with cycling. The lattice strain introduced in the milled MgH2 powders was significantly removed by cycling for less milled powders (milled for

AB - Microstructure of MgH2 powder particles milled for 5-60 h was studied after the powders were hydrogen cycled. Using electron microscopy we estimated individual grain size and particle size of cycled powders to compare with those before H-cycling. The nano-size grains were found to grow (3-10 times) whereas the particles undergo a mild refinement upon H-cycling. The most prominent grain growth was within the 1st dehydrogenation. The smaller grains in the milled powders demonstrated faster growth upon cycling. The average grain size estimated in this study for the cycled powders were >200 nm. The grain and particle size approached a regular or log-normal distribution with cycling. The lattice strain introduced in the milled MgH2 powders was significantly removed by cycling for less milled powders (milled for

KW - Hydrogen cycle

KW - Magnesium hydride

KW - Hydrogen energy

KW - Ball milling

KW - Microstructure

KW - Electron microscopy

U2 - 10.1016/j.ijhydene.2010.05.059

DO - 10.1016/j.ijhydene.2010.05.059

M3 - Article

VL - 35

SP - 9012

EP - 9020

JO - International Journal of Hydrogen Energy

JF - International Journal of Hydrogen Energy

SN - 0360-3199

IS - 17

ER -