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Kinetics of Phase Transformations in Mg〈sub〉2〈/sub〉Ni-H System (2008)

Čermák, Jiří ; Král, Lubomir ; David, B. ; [et al.]

s.l. ; Stafa-Zurich, Switzerland

Solid state phenomena Vol. 138 (Mar. 2008), p. 71-90

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ISSN: 1662-9779

Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008

Topics: Physics

Notes: Kinetics of hydrogen desorption from Mg2NiH4 was studied. Experimental material wasprepared by two techniques – by melting and casting and by ball-milling and compacting intopellets. Experimental materials were hydrogen charged at elevated temperature and pressure. Thepellets were charged in two different regimes resulting in structures with high fraction of twinnedlow-temperature phase LT2 and with low fraction of LT2. It was made an attempt to measurediffusion coefficients of hydrogen and its temperature dependence both in high-temperature (HT)and in low-temperature (LT) phases of Mg2NiH4. The measurement was carried out in temperatureinterval from 449 K to 576 K by the volumetric method. It was found that the LT2 slows-down thedesorption rate considerably

Type of Medium: Electronic Resource

URL: http://www.tib-hannover.de/fulltexts/2011/0528/02/24/transtech_doi~10.4028%252Fwww.scientific.net%252FSSP.138.71.pdf

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