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Journal ArticleDOI
C.P. Doǧan, J.A. Hawk 
01 Oct 2001-Wear
51 Citations
Nonetheless, characteristics of the ceramic microstructure do influence its hardness and fracture toughness and must, therefore, play an active role in determining how a ceramic will respond to the specific stress states imposed upon it by the wear environment.
Their development in the ceramic may lead to wear and failure of the ceramic cutting plates.
Moreover, the coated ceramic tool has been found to lead to a better surface quality and a minimum cutting force compared to those obtained by uncoated ceramic.
The system demonstrated the capacity to detect differences in sharpness in regions of a knife edge as well as providing visual evidence of defects along the edge of a knife blade.
RESULTS The tensile stresses in the crown for the chamfer knife-edge preparation might put the integrity of the currently available ceramic materials at risk, while a non-uniform cement layer might result in stresses exceeding the bond strength.
The obtained results demonstrate that the modification of a knife with hard coatings delays drawbacks of a knife wearing out processes.
The results show that when the ceramic is impacted by a projectile, a fragmented ceramic conoid breaks from ceramic tile and the semi-angle of ceramic conoid with increasing initial velocity decreases.
We present the case as a warning that fracture of a ceramic component should be revised to another ceramic-on-ceramic articulation in order to minimise the risk of further catastrophic wear.

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