<div class="csl-bib-body">
<div class="csl-entry">Hirle, A. V., Fuger, C., Hahn, R., Wojcik, T., Kutrowatz, P., Podsednik, M., Hunold, O., Kolozsvári, S., Polcik, P., & Riedl-Tragenreif, H. (2024, February 1). <i>Revisiting the structure-property relationship of superhard TiB₂+z coatings</i> [Conference Presentation]. 48th International Conference and Expo on Advanced Ceramics and Composites (ICACC 2024), Daytona Beach, Florida, United States of America (the). http://hdl.handle.net/20.500.12708/198784</div>
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dc.identifier.uri
http://hdl.handle.net/20.500.12708/198784
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dc.description.abstract
As one representative of ultra-high temperature ceramics (UHTCs), titanium diboride (TiB2) is well-known for its excellent properties, such as super hardness, good thermal conductivity, or chemical stability. Based on these unique features, it is used for diverse bulk and thin film purposes. Although TiB2 thin films have already been thoroughly investigated, there are still unresolved questions regarding stoichiometry's impact and structural imperfections (B-rich tissue phases) on the mechanical properties. For a detailed investigation, we synthesized a stoichiometric variation from TiB2.04 to TiB4.42 by DC magnetron sputtering. We characterized the coatings using a broad set of techniques including SEM, TEM, nanoindentation, and in-situ microcantilever bending experiments to assess the fracture behavior. For achieving super hardness (> 40 GPa), a (0001) orientation is essential, whereas for ("10" "1" ̅"1" ) and (1000) oriented coatings oriented coatings, we observed a linear decrease in hardness down to ≈ 30 GPa. The fracture toughness (KIC) features a tissue phase-dependent behavior with increasing values from 2.51 ± 0.14 MPa√m for TiB4.42 to 3.55 ± 0.16 MPa√m for TiB2.22 due to a decreasing tissue phase width, showing the impact of grain boundary constitution on the fracture properties. In summary, our results highlight the effects of texture and morphological design on PVD grown TiB2+z coatings.
en
dc.description.sponsorship
Christian Doppler Forschungsgesells
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dc.language.iso
en
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dc.subject
Physical Vapor Deposition (PVD)
en
dc.subject
Thin Films
en
dc.subject
Titanium Diboride
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dc.subject
Mechanical properties
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dc.title
Revisiting the structure-property relationship of superhard TiB₂+z coatings
en
dc.type
Presentation
en
dc.type
Vortrag
de
dc.contributor.affiliation
TU Wien, Austria
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dc.contributor.affiliation
Oerlikon (Liechtenstein), Liechtenstein
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dc.contributor.affiliation
Plansee (Germany), Germany
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dc.contributor.affiliation
Plansee (Germany), Germany
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dc.relation.grantno
CDL-SEC
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dc.type.category
Conference 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
