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Yttrium Aluminum Garnet (YAG) Films through a Precursor Plasma Spraying Technique
Author(s) -
Parukuttyamma Sujatha D.,
Margolis Joshua,
Liu Haiming,
Grey Clare P.,
Sampath Sanjay,
Herman Herbert,
Parise John B.
Publication year - 2001
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.1151-2916.2001.tb00935.x
Subject(s) - yttrium , materials science , orthorhombic crystal system , aluminate , phase (matter) , plasma , ceramic , analytical chemistry (journal) , oxide , mineralogy , metallurgy , crystal structure , crystallography , chemistry , physics , organic chemistry , chromatography , quantum mechanics , cement
Coatings of yttrium aluminum garnet (Y 3 Al 5 O 12 , YAG), which is a promising high‐temperature ceramic, were developed for the first time using a novel precursor plasma spraying (PPS) technique. The precursor sol was sprayed using a radio‐frequency induction plasma technique. X‐ray diffraction analysis of the as‐sprayed coatings confirmed that a metastable hexagonal yttrium aluminate (H‐YAlO 3 ) was the major phase. The above‐described specimen, on further treatment with plasma, was converted to cubic garnet (YAG) as the major phase, with a minor amount of orthorhombic YAlO 3 (O‐YAP) phase. 27 Al magic‐angle spinning nuclear magnetic resonance of the YAG coating corroborated the X‐ray results and confirmed the presence of YAG and O‐YAP phases. Formation of the garnet phase through the PPS technique is proof that the chemistry can be controlled in the plasma. This finding opens up new avenues for developing complex functional oxide deposits.