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SUMMARY:OBSERVATION OF GRAIN-BOUNDARY STRUCTURE FEATURES IN ALUMINIUM ALLO
 YS BY MEANS OF XAS AND X-RAY TOMOGRAPHY  BY SR
DTSTART;VALUE=DATE-TIME:20160705T090000Z
DTEND;VALUE=DATE-TIME:20160705T100000Z
DTSTAMP;VALUE=DATE-TIME:20260811T203424Z
UID:indico-contribution-1161@indico.inp.nsk.su
DESCRIPTION:Speakers: Alexander Nizovskii (Boreskov Institute of Catalysis
 )\nAluminum and its alloys are considered to be the promising agents for h
 ydrogen production in reaction with water to use them in compact fuel cell
 s. The only problem is to increase their reactivity. One of the methods of
  activation is the treatment of aluminum by gallium-based liquid metal eut
 ectics. Previously\, we noted that the process of activating the aluminum 
 alloys was associated with the grain boundary diffusion of the eutectic co
 mponents.\nTo determine the nature of high reactivity of the activated mat
 erial in reaction with water\, a number of commercial aluminum alloys were
  studied with the help of the methods of XAS and X-Ray tomography by SR af
 ter activation. It was shown that the highly active state was associated w
 ith the formation of the nanostructured material\, wherein the components 
 of Ga-In eutectic distributed throughout the grain boundaries in the all t
 he mass of the original sample.\nTo confirm this observation\, the aluminu
 m alloys with different grain boundary structures have been investigated i
 ncluding those having high reactivity as well as the samples which lost th
 e activity during prolonged storage under atmospheric conditions. Using X-
 ray tomography by SR\, it was shown that in all the highly reactive sample
 s\, the components of Ga-In eutectic were distributed in the grain boundar
 ies of the entire material. The activated samples\, in which the component
 s were not evenly distributed\, did not completely dissolve in water. By X
 AS method\, it has been found that in the highly active material\, the eut
 ectic components were in metallic state. Deactivation during prolonged sto
 rage under atmospheric conditions was associated with oxidation of the com
 ponents of the eutectic alloy.\nIt is shown that  the distribution of the 
 eutectic component in the sample is determined by the grain boundary struc
 ture of the initial  material.\n\nhttps://indico.inp.nsk.su/event/3/contri
 butions/1161/
LOCATION:Budker INP 2nd and 3rd floors
URL:https://indico.inp.nsk.su/event/3/contributions/1161/
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