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Effect of Grain Size on Transverse Bend Strength of Alumina and Magnesia
Author(s) -
SPRIGGS R. M.,
VASILOS T.
Publication year - 1963
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.1151-2916.1963.tb19777.x
Subject(s) - grain size , microstructure , materials science , porosity , flexural strength , composite material , transverse plane , magnesium , mineralogy , metallurgy , chemistry , structural engineering , engineering
Experimental findings are presented for the effect of microstructure on the room‐temperature transverse bend strength properties of hot‐pressed dense pure alumina and magnesia. Bend strength shows an exponential dependence on porosity but is sensitive to fabricating temperatures because of changes in grain size. Log‐log plots of strength (extrapolated to zero porosity) versus grain size reveal the relation S = 86,000 G −1/3 (psi) for alumina and S = 50,000G −1/6 (psi) for heat‐treated specimens of magnesia ( G = grain size in microns).