"hydrogen; magnesium alloys; hydrogen storage; hydrides"@en . "0"^^ . "Dif\u00FAze vod\u00EDku ve slitin\u00E1ch Mg-Ni modifikovan\u00FDch vybran\u00FDmi prvky sni\u017Euj\u00EDc\u00EDmi stabilitu hydrid\u016F" . " magnesium alloys" . "1"^^ . "2015-01-22+01:00"^^ . . "0"^^ . "V r\u00E1mci projektu byly studov\u00E1ny charakteristiky slitin na b\u00E1zi Mg-Ni ur\u010Den\u00FDch pro skladov\u00E1n\u00ED vod\u00EDku jako paliva pro v\u00FDrobu energie. C\u00EDlem bylo jednak dos\u00E1hnout hlub\u0161\u00EDho porozum\u011Bn\u00ED z\u00E1konitost\u00ED, kter\u00E9 ur\u010Duj\u00ED rychlost desorpce vod\u00EDku ze slitiny a jednak nale"@cs . . . "The aim of the project is (i) to obtain the diffusion coefficients of hydrogen in Mg, Mg-xNi and Mg-xNi-yX alloys with the third element X that shows no significant tendency to hydride formation and\u00A0 (ii) to measure the hydrogen desorption spectras of modified (Mg-xNi-yX)-H alloys by DSC. The alloys will be prepared by ball-milling and following pressure compacting and by ball-milling followed by induction melting.\u00A0 Average Ni concentration will be x = 10, 23.5 (eutectic), 40, 54.5 (Mg2Ni) and 60 wt.%.\u00A0 Alloying elements X will be chosen from group II.-IV. (X: Zn, Ga, In, Si, Ge and Sn) and their concentration y will be in units of weight percent. Characteristics of the samples will be checked by electron microanalysis using SEM/EDAX and by DSC. Experimental temperatures will span from the room temperature up to the solidus. Diffusion coefficients will be obtained by tenzimetric method: The samples will be hydrogenised by gaseous hydrogen in a furnace. Diffusion coefficients will be calculated"@en . "."@en . . . . "2009-12-31+01:00"^^ . . . "GA106/07/0010" . . " hydrogen storage" . "Diffusion of hydrogen in alloys Mg-Ni modified by chosen elements that suppress the stability of hydrides"@en . "http://www.isvav.cz/projectDetail.do?rowId=GA106/07/0010"^^ . . . . . "2009-04-22+02:00"^^ . "hydrogen" . . . . "2007-01-01+01:00"^^ . "10"^^ . . "10"^^ . . . . "C\u00EDlem projektu je (i) nam\u011B\u0159it koeficienty dif\u00FAze vod\u00EDku v\u00A0Mg, ve slitin\u00E1ch Mg-xNi, a ve slitin\u00E1ch Mg-xNi-yX modifikovan\u00FDch t\u0159et\u00EDm elementem X kter\u00FD nevykazuje v\u00FDraznou tendenci k tvorb\u011B hydrid\u016F a (ii) zm\u011B\u0159it desorp\u010Dn\u00ED spektrum modifikovan\u00FDch slitin (Mg-xNi-yX)-H metodou DSC. Slitiny budou p\u0159ipraveny jednak metodou mechanick\u00E9ho legov\u00E1n\u00ED v kulov\u00E9m ml\u00FDnu a\u00A0 zkompaktov\u00E1n\u00EDm mlet\u00E9ho pr\u00E1\u0161ku a jednak mlet\u00EDm a n\u00E1sledn\u00FDm p\u0159etaven\u00EDm. Pr\u016Fm\u011Brn\u00E1 koncentrace Ni bude x = 10; 23,5 (eutektic\u00E9 slo\u017Een\u00ED); 40; 54,5 (Mg2Ni) a 60 v\u00E1h. %. Legovac\u00ED prvky X budou vybr\u00E1ny z\u00A0grup II. - IV. (X = Zn, Ga, In, Si, Ge a Sn) a jejich koncentrace bude v jednotk\u00E1ch v\u00E1h. %. Vzorky budou studov\u00E1ny pomoc\u00ED SEM/EDAX a DSC. Experiment\u00E1ln\u00ED teploty budou pokr\u00FDvat oblast od pokojov\u00E9 teploty po solidus. Dif\u00FAzn\u00ED koeficienty budou m\u011B\u0159eny tenzimetrickou metodou: Vzorky budou nasyceny vod\u00EDkem v\u00A0peci z\u00A0plynn\u00E9 f\u00E1ze. Koeficienty dif\u00FAze pak budou vypo\u010Dteny ze z\u00E1znamu z\u00E1vislosti tlaku desorbovan\u00E9ho vod\u00EDku na \u010Dase." .