Fracture Response of Ceramic Materials to Indentation Loading

The indentation technique is applied to the testing of two types of tool ceramics (alumina and silicon nitride). The course of cracks initiated at indentation corners is analyzed. Beside the basic mechanical properties (indentation fracture toughness, K(sub ic), crack resistance, W) the response of...

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Bibliographic Details
Published in:Key Engineering Materials 2002-01, Vol.223, p.247-250
Main Authors: Mazanec, Karel, Jonšta, Zdenĕk, Melková, Lucie
Format: Article
Language:English
Online Access:Get full text
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Summary:The indentation technique is applied to the testing of two types of tool ceramics (alumina and silicon nitride). The course of cracks initiated at indentation corners is analyzed. Beside the basic mechanical properties (indentation fracture toughness, K(sub ic), crack resistance, W) the response of the tool ceramics to repeated loading is evaluated. The relationship between median /radial cracks and lateral crack initiation is presented. The propagation of subsurface lateral cracks results in a chipping formation that represents the final stage of fatigue durability. A microfractography analysis of chipping surfaces is presented. (Author)
ISSN:1013-9826
1662-9795
1662-9795
DOI:10.4028/www.scientific.net/KEM.223.247