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DTSTAMP:20260825T180539Z
UID:https://www.mpie.de/events/35288/3755656
DTSTART:20230831T120000Z
DTEND:20230831T130000Z
CLASS:PUBLIC
CREATED:20230829T120814Z
DESCRIPTION:There’s plenty of room at the grain boundary (GB)\, in which 
 we can manipulate its energy and structure for particular properties in po
 lycrystalline materials. Recently\, we observed that the aesthetic of the 
 room quantified by the electrical conductance was changed dramatically by 
 simply by turning on/off a UV laser. Specifically\, based on photoelectron
  spectroscopy and complementary conductive atomic force microscopy\, we de
 monstrate that the hundredfold increases in the electrical conductance mea
 sured at the GB are strongly associated with the ultraviolet-induced oxyge
 n vacancies\, and thus offering novel strategies for optoelectronic or neu
 romorphic computing applications. Historically\, it is a challenge to opti
 mize the room especially in the case of body-centered cubic (bcc) metals d
 ue to the lack of quantitative relations between GB energies and populatio
 ns or microstructure-property-processing relationships. Here\, we present 
 a universal function for computing the energies of arbitrary GBs in the bc
 c metals. The effectiveness of the universal function in describing the va
 riations of the GB energies is demonstrated by consistency between the out
 put of the function and the energies of ~ 2\,500 GBs simulated by the embe
 dded atom method. Large-scale comparisons between the interpolated energie
 s and measured GB populations reveal that the population distributions are
  governed by local energy minima located at the Σ1\, Σ3\, Σ9\, Σ11\, a
 nd Σ33a misorientations\, representing a major step forward for the GB en
 gineering of bcc metals.\nSpeaker: Dr. Sutatch Ratanaphan 
LAST-MODIFIED:20230929T115802Z
LOCATION:Max-Planck-Institut für Eisenforschung GmbH\, Room: Large Confere
 nce Room No. 203
ORGANIZER;CN=Dr. James Best :mailto:
SUMMARY:There’s plenty of Room at the (Grain) Boundary
URL;VALUE=URI:https://www.mpie.de/events/35288/3755656
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