TY  - JOUR
AU  - Gastaldi, J.
AU  - Schenk, T.
AU  - Reinhart, G.
AU  - Klein, H.
AU  - Härtwig, J.
AU  - Mangelinck-Noel, N.
AU  - Grushko, B.
AU  - Nguyen Thi, H.
AU  - Pino, P.
AU  - Billia, B.
AU  - Baruchel, J.
TI  - In situ observation of pore evolution during melting and solidification of Al-Pd-Mn quasicrystals by synchrotron X-ray radiography
JO  - Philosophical magazine  / A
VL  - 86
SN  - 0141-8610
CY  - London [u.a.]
PB  - Taylor and Francis
M1  - PreJuSER-57957
PY  - 2006
N1  - Record converted from VDB: 12.11.2012
AB  - It is now generally admitted that pores are intriguing special features of quasicrystals. Therefore, we have performed an 'in situ' and real time observation of the pore evolution during directional solidi. cation and melting cycles of an icosahedral Al-Pd-Mn bi-grained sample, by synchrotron X-ray radiography. Rather surprisingly, no pore was observed to grow during the solidi. cation stages. Nucleation and growth of pores were first seen during melting. These pores were subsequently shrinking either just before being absorbed or during resumption of directional solidi. cation. It is concluded that the vacancy origin of pores is certainly valid whereas the vacancy supersaturation, needed thereby to explain their growth, would be more probably related to the peculiar structure of quasicrystal than to the destruction of the thermal equilibrium.
KW  - J (WoSType)
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000234711000013
DO  - DOI:10.1080/14786430500228093
UR  - https://juser.fz-juelich.de/record/57957
ER  -