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Hot Corrosion of (Sm 1− x Yb x ) 2 Zr 2 O 7 ( x =0, 0.5, 1.0) Ceramics Against V 2 O 5 Molten Salt in Air at 800°C
Author(s) -
Li Sa,
Liu ZhanGuo,
Ouyang JiaHu
Publication year - 2011
Publication title -
international journal of applied ceramic technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.4
H-Index - 57
eISSN - 1744-7402
pISSN - 1546-542X
DOI - 10.1111/j.1744-7402.2011.02623.x
Subject(s) - materials science , corrosion , calcination , coprecipitation , metallurgy , phase (matter) , analytical chemistry (journal) , inorganic chemistry , catalysis , chromatography , biochemistry , chemistry , organic chemistry
(Sm 1− x Yb x ) 2 Zr 2 O 7 ( x =0, 0.5, 1.0) powders synthesized by chemical‐coprecipitation and calcination method were pressureless‐sintered at 1700°C for 10 h in air. Molten V 2 O 5 reacts with (Sm 1− x Yb x ) 2 Zr 2 O 7 to form m ‐ZrO 2 and rare‐earth vanadates at 800°C. The thickness of corrosion scales was investigated to evaluate the hot corrosion resistance of (Sm 1− x Yb x ) 2 Zr 2 O 7 . The hot corrosion resistance of (Sm 1− x Yb x ) 2 Zr 2 O 7 against molten V 2 O 5 increases with increasing Yb content. The hot corrosion mechanisms were proposed based on phase diagrams and the difference in hot corrosion resistance was discussed on terms of basicity of (Sm 1− x Yb x ) 2 Zr 2 O 7 ceramics.