期刊
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
卷 26, 期 8, 页码 1421-1427出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.jeurceramsoc.2005.02.016
关键词
mechanical properties; fracture; strength; toughness and toughening; notched specimen; testing
The fracture toughness measurement of ceramics is based on notched specimens. If the notch-root radius is too large, it leads to overestimate the actual fracture toughness of the material. it is then necessary to control the notch shape and to machine it carefully in order to have a root-radius small enough (< 10 mu m) to be below the sensitivity threshold of the material. Then, the notch confounds with a sharp crack. Alternatively, it is proposed in this work to bring a correction to the measured fracture toughness depending oil the notch-root radius. No restriction is brought to this radius except that it Must be small compared to the notch length. (c) 2005 Elsevier Ltd. All rights reserved.
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