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Effects of Temperature and Microstructure on the Elastic Properties of Selected Eu 2 O 3 ‐HfO 2 Compositions
Author(s) -
SUCHOMEL R. R.,
HUNTER O.
Publication year - 1976
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1976.tb09454.x
Subject(s) - sesquioxide , monoclinic crystal system , europium , materials science , microstructure , mineralogy , analytical chemistry (journal) , crystallography , metallurgy , crystal structure , luminescence , chemistry , optoelectronics , chromatography
Europium sesquioxide is of interest as a control material for reactors because it has several large‐cross‐section isotopes which are formed successively on neutron capture. Elastic properties of Eu 2 O 3 and selected Eu 2 O 3 ‐rich Eu 2 O 3 ‐HfO 2 compositions were investigated by the sonic technique from room temperature to 1500°C. Sintered monoclinic Eu 2 O 3 was found to have anomalously low room temperature moduli and to exhibit hysteresis on thermal cycling. Fine‐grained hot‐pressed Eu 2 O 3 , as well as sintered specimens that contained at least 6 mol% HfO 2 did not exhibit these anomalous characteristics.