Micro-Indentation Fracture Toughness Evaluation with a Novel Microscopy

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Abstract:

A novel microscopy is developed for evaluating the fracture toughness of thin ceramic sheets using the micro-indentation method. This microscopy overcomes the theoretical limit of measurement resolution associated with optical microscopes. Using a modified optical microscope, the crack lengths produced by micro-indentation on the surface of an as-fired ceramic sheet can now be measured. Experimental results on an 8 mol% yttria-stabilized zirconia ceramic substrate show that the accuracy of the fracture toughness evaluation is satisfactory. This micro-indentation fracture toughness evaluation method is efficient and economical for thin ceramic substrate surfaces, either polished or as-fired.

Document Type: Research Article

DOI: http://dx.doi.org/10.1111/j.1551-2916.2005.00316.x

Affiliations: Department of Aerospace and Mechanical Engineering, The University of Arizona, Tucson, Arizona 85721

Publication date: June 1, 2005

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