Electrochemical hydriding of nanocrystalline Mg-Ni-X (X = Co, Mn, Nd) alloys prepared by mechanical alloying and spark plasma sintering
Identifikátory výsledku
Kód výsledku v IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22310%2F17%3A43915361" target="_blank" >RIV/60461373:22310/17:43915361 - isvavai.cz</a>
Výsledek na webu
<a href="http://dx.doi.org/10.1016/j.jallcom.2017.08.059" target="_blank" >http://dx.doi.org/10.1016/j.jallcom.2017.08.059</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.jallcom.2017.08.059" target="_blank" >10.1016/j.jallcom.2017.08.059</a>
Alternativní jazyky
Jazyk výsledku
angličtina
Název v původním jazyce
Electrochemical hydriding of nanocrystalline Mg-Ni-X (X = Co, Mn, Nd) alloys prepared by mechanical alloying and spark plasma sintering
Popis výsledku v původním jazyce
In this work, MgNi26, MgNi26Mn10, MgNi26Co10 and MgNi26Nd10 alloys were prepared by mechanical alloying (MA) and subsequent spark plasma sintering (SPS). Mechanical alloying leads to a grain refinement and increases the concentration of lattice defects. SPS technology provides a compact material but with high porosity, consequently creating a high internal surface area within the volume of sample. The combination of the MA and SPS techniques produces a promising material in terms of fast hydriding kinetics and a high content of absorbed hydrogen. All samples were electrochemically hydrided in a 6 mol/L KOH solution at 80 degrees C for 480 min. The microstructures of the alloys were characterized by scanning electron microscopy and energy dispersive spectrometry. The phase compositions were characterized by X-ray diffraction, and the total hydrogen content in the hydrided pellets was measured using an inert gas fusion analyser. The dehydriding process was studied by thermogravimetry and mass spectrometry. The highest total amount of hydrogen was absorbed by the MgNi26Nd10 alloy, nearly 1.8 wt%. The main hydriding product was the binary hydride MgH2. The results of the mass spectrometry analysis reveal a significant reduction in the temperature of hydrogen evolution from magnesium hydride, probably due to the formation of fine microstructures of the hydrogenated alloys and catalytic effect of Ni. The decomposition temperature was reduced by more than 200 degrees C as compared to the commercial MgH2.
Název v anglickém jazyce
Electrochemical hydriding of nanocrystalline Mg-Ni-X (X = Co, Mn, Nd) alloys prepared by mechanical alloying and spark plasma sintering
Popis výsledku anglicky
In this work, MgNi26, MgNi26Mn10, MgNi26Co10 and MgNi26Nd10 alloys were prepared by mechanical alloying (MA) and subsequent spark plasma sintering (SPS). Mechanical alloying leads to a grain refinement and increases the concentration of lattice defects. SPS technology provides a compact material but with high porosity, consequently creating a high internal surface area within the volume of sample. The combination of the MA and SPS techniques produces a promising material in terms of fast hydriding kinetics and a high content of absorbed hydrogen. All samples were electrochemically hydrided in a 6 mol/L KOH solution at 80 degrees C for 480 min. The microstructures of the alloys were characterized by scanning electron microscopy and energy dispersive spectrometry. The phase compositions were characterized by X-ray diffraction, and the total hydrogen content in the hydrided pellets was measured using an inert gas fusion analyser. The dehydriding process was studied by thermogravimetry and mass spectrometry. The highest total amount of hydrogen was absorbed by the MgNi26Nd10 alloy, nearly 1.8 wt%. The main hydriding product was the binary hydride MgH2. The results of the mass spectrometry analysis reveal a significant reduction in the temperature of hydrogen evolution from magnesium hydride, probably due to the formation of fine microstructures of the hydrogenated alloys and catalytic effect of Ni. The decomposition temperature was reduced by more than 200 degrees C as compared to the commercial MgH2.
Klasifikace
Druh
J<sub>imp</sub> - Článek v periodiku v databázi Web of Science
CEP obor
—
OECD FORD obor
20501 - Materials engineering
Návaznosti výsledku
Projekt
<a href="/cs/project/GBP108%2F12%2FG043" target="_blank" >GBP108/12/G043: Mikro- a nanokrystalické materiály s vysokým podílem rozhraní pro moderní strukturní aplikace, biodegradabilní implantáty a uchovávání vodíku</a><br>
Návaznosti
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Ostatní
Rok uplatnění
2017
Kód důvěrnosti údajů
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Údaje specifické pro druh výsledku
Název periodika
Journal of Alloys and Compounds
ISSN
0925-8388
e-ISSN
—
Svazek periodika
726
Číslo periodika v rámci svazku
December
Stát vydavatele periodika
US - Spojené státy americké
Počet stran výsledku
9
Strana od-do
787-795
Kód UT WoS článku
000412606000097
EID výsledku v databázi Scopus
2-s2.0-85028352689