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Eutectic Composition in the Pseudobinary of Y 4 Al 2 O 9 and Y 2 O 3
Author(s) -
Mah TaiIl,
Petry M. Dennis
Publication year - 1992
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.1151-2916.1992.tb07236.x
Subject(s) - eutectic system , electron microprobe , electron probe microanalysis , composition (language) , microstructure , microanalysis , chemical composition , materials science , analytical chemistry (journal) , mineralogy , metallurgy , crystallography , chemistry , chromatography , linguistics , philosophy , organic chemistry
The eutectic composition between Y 4 Al 2 O 9 and Y 2 O 3 was determined using electron probe microanalysis (EPMA) on directionally solidified specimens with hypo‐ and hypereutectic compositions. The microstructures of the specimens as a function of composition differ considerably with small deviation from the eutectic composition (70.5 mol% Y 2 O 3 and 29.5 mol% Al 2 O 3 ). Based on the current results and other published data, the pseudobinary system between Al 2 O 3 and Y 2 O 3 is revised.