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Study of Microstructural Effects in the Strength of Alumina Using Controlled Flaws
Author(s) -
Lawn Brian R.,
Freiman Stephen W.,
Baker Theresa L.,
Cobb Deborah D.,
Gonzalez Armando C.
Publication year - 1984
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.1151-2916.1984.tb18831.x
Subject(s) - indentation , microstructure , materials science , grain size , formalism (music) , composite material , mineralogy , geology , art , musical , visual arts
Strength characteristics were studied as a function ofVickers indentation Load for aluminas with two grain sizes. At low loads the strengths tend to well‐defined plateaus, the levels of which bear an inverse relation to grain size. These trends are consistent with a trunsition from indentation‐controlled to microstructure‐controlled behavior as flaw size diminishes. The conventional indentation fracture formalism was modified to account for this transition.