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Medientyp:
E-Artikel
Titel:
Analysis of Residual Stress in 6H‐SiC Particles within Al2O3/SiC Composites through Raman Spectroscopy
Beteiligte:
DiGregorio, John F.;
Furtak, Thomas E.
Erschienen:
Wiley, 1992
Erschienen in:
Journal of the American Ceramic Society, 75 (1992) 7, Seite 1854-1857
Sprache:
Englisch
DOI:
10.1111/j.1151-2916.1992.tb07207.x
ISSN:
0002-7820;
1551-2916
Entstehung:
Anmerkungen:
Beschreibung:
<jats:p>We measured the Raman spectrum associated with the E<jats:sub>2</jats:sub>‐TO<jats:sub>quasi</jats:sub> and LO<jats:sub>quasi</jats:sub> modes of 6H‐SiC particles as a function of hydrostatic pressure using a diamond anvil cell. The results of this calibration experiment were used to analyze the residual stress in 6H‐SiC particles within Al<jats:sub>2</jats:sub>O<jats:sub>3</jats:sub>/SiC composites with 12%, 20%, and 30% SiC by volume. The Raman spectra show that residual stress in the SiC near the surface of the composites is −2040 ± 120, −1841 ± 110, and −1615 ± 100 MPa for the 12%, 20%, and 30% SiC composites, respectively. The measured decrease in stress with increasing packing fraction is consistent with theoretical predictions based on micromechanics.</jats:p>