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SiAlON–SiC Sandwich Structures with Tailored Surface Compression
Author(s) -
Hoff Kyle,
Green David J.,
Jin Youngho,
Ryba Earle,
Hellmann John R.
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.1744-7402.2011.02634.x
Subject(s) - materials science , sialon , residual stress , composite material , ceramic , indentation , composite number , compression (physics) , diffraction , core (optical fiber) , thermal expansion , optics , physics
The feasibility of producing high‐hardness ceramic sandwich structures, with compressive residual stresses in the faces, was evaluated in this study. The faces were originally chosen to be SiAlON with an SiC core. To produce structures that did not crack during processing, however, it was necessary to hybridize the faces by adding SiC particles to the SiAlON. This modification resulted in a composite face that reduced the thermal expansion mismatch with the core. The residual stresses in the face were measured with an indentation technique and these values agreed well with those measured by X‐ray diffraction and calculated from the theory using experimental values.