<div class="csl-bib-body">
<div class="csl-entry">Hahn, R., Kolozsvari, S., Polcik, P., Jerg, C., & Riedl-Tragenreif, H. (2024, May 23). <i>The Influence of Cantilever Geometry on the Measured Fracture Toughness of Hard Coatings</i> [Poster Presentation]. 50th International Conference on Metallurgical Coatings and Thin Films (ICMCTF 2024), San Diego, United States of America (the). http://hdl.handle.net/20.500.12708/210688</div>
</div>
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dc.identifier.uri
http://hdl.handle.net/20.500.12708/210688
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dc.description.abstract
Fracture toughness, KIC, is an essential material property representing the
resistance to crack propagation in the most prevalent opening mode. The
fracture toughness should be correspondingly high to prevent premature
failure of a material or a thin film with subsequent environmental exposure
of the substrate. As a result, toughness is an important safety factor when
designing protective coating materials exposed to mechanical loads. The
fracture toughness of coatings is typically determined using
micromechanical methods due to the small dimensions. The
microcantilever bending test should be particularly mentioned here, as it
determines the intrinsic KIC without possible substrate influences.
This study investigated the influence of the cantilever geometry, particularly
the distance between the point of force application and the position of the
predefined crack. For this purpose, cathodic arc evaporated TiN was
selected as a reference material, and a series of cantilevers were fabricated
via focused ion beam (FIB) milling, and subsequently tested with an in-situ
indentation stage within the SEM. The calculated fracture toughness was
found to be dependent on the distance: as the distance increased, the
values decrease to a subsequently constant KIC. In summary, this study
discusses failure sources for any over- and under-estimations due to
geometrical aspects and provides guidelines for properly conducting and
interpreting microcantilever bending tests estimating KIC.
en
dc.description.sponsorship
Christian Doppler Forschungsgesells
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dc.language.iso
en
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dc.subject
Fracture Toughness
en
dc.subject
Microcantilever Bending
en
dc.subject
Hard Coating
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dc.title
The Influence of Cantilever Geometry on the Measured Fracture Toughness of Hard Coatings
en
dc.type
Presentation
en
dc.type
Vortrag
de
dc.contributor.affiliation
Plansee (Germany), Germany
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dc.contributor.affiliation
Oerlikon (Switzerland), Switzerland
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dc.relation.grantno
CDL-SEC
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dc.type.category
Poster Presentation
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tuw.project.title
Oberflächentechnik von hochbeanspruchten Präzisionskomponenten
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tuw.researchinfrastructure
Röntgenzentrum
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tuw.researchinfrastructure
Universitäre Service-Einrichtung für Transmissionselektronenmikroskopie
