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Chemically Strengthened, Leached Alumina and Spinel
Author(s) -
KIRCHNER HENRY P.,
GRUVER ROBERT M.,
WALKER RALPH E.
Publication year - 1967
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.1151-2916.1967.tb15074.x
Subject(s) - spinel , hydrofluoric acid , solid solution , materials science , aqueous solution , intergranular corrosion , flexural strength , thermal shock , chemical engineering , mineralogy , composite material , metallurgy , microstructure , chemistry , engineering
Low‐expansion solid solution surface layers formed by chemical reactions at high temperatures were used to chemically strengthen alumina and spinel bodies. Solid solutions in the system Al 2 O 3 ‐Cr 2 O 3 strengthened alumina, and solid solutions in the system MgO·Al 2 O 3 ‐MgO·Cr 2 O 3 strengthened spinel. Prior treatments with aqueous hydrofluoric acid were used to remove intergranular material and increase the thickness of the solid solution layers. The relative compressive stresses, distribution of the flexural strengths, and thermal shock resistance of the strengthened materials were investigated.