Measuring fracture toughness of coatings using focused-ion-beam-machined microbeams
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- 1 February 2005
- journal article
- Published by Springer Nature in Journal of Materials Research
- Vol. 20 (2) , 299-302
- https://doi.org/10.1557/jmr.2005.0048
Abstract
Measuring the toughness of brittle coatings has always been a difficult task. Coatings are often too thin to easily prepare a freestanding sample of a defined geometry to use standard toughness measuring techniques. Using standard indentation techniques gives results influenced by the effect of the substrate. A new technique for measuring the toughness of coatings is described here. A precracked micro-beam was produced using focused ion beam (FIB) machining, then imaged and loaded to fracture using a nanoindenter.Keywords
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