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Mullite/alumina particulate composites by infiltration processing : III, mechanical properties

From National Research Council Canada

DOIResolve DOI: https://doi.org/10.1111/j.1151-2916.1991.tb06784.x
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FormatText, Article
Abstract
The effect of incorporating mullite into alumina by an infiltration process on the mechanical properties was investigated. Data for Young's modulus, strength, and fracture toughness for various composite compositions were compared with those for the unreinforced matrix (alumina). Measurements of Young's modulus by a resonance technique showed that the addition of mullite decreased Young's modulus. Up to 14 vol%, these changes were close to those expected, but above this mullite content, the decrease was more dramatic and indicated specimen damage during processing. The addition of mullite led, in some cases, to increases of more than 60% in both the strength (biaxial flexure) and indentation fracture toughness. These increases have been attributed to the method of introducing mullite and the resulting residual compressive surface stresses. The strength of the indented composite bodies deviated from the ideal behavior, indicating the probability of R‐curve behavior in these materials.
Publication date
PublisherWiley
In
  • Journal of the American Ceramic Society 74, no. 10: 2453–2459.
NoteSupported by the National Research Council of Canada
LanguageEnglish
Peer reviewedYes
NRC publication
This is a non-NRC publication

"Non-NRC publications" are publications authored by NRC employees prior to their employment by NRC.

NRC numberCNRC 33379
NRC-IMI91AP-20200-1253-G
NPARC number23004669
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Record identifier6268fb15-bfca-495e-bbc0-a0a5df536d06
Record created2018-12-07
Record modified2020-03-17
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