<div class="csl-bib-body">
<div class="csl-entry">Hirle, A. V., Dörflinger, P., Hahn, R., Gutschka, C., Wojcik, T., Podsednik, M., Kolozsvári, S., Polcik, P., Jerg, C., & Riedl-Tragenreif, H. (2025, May 15). <i>Micromechanical properties of Ti1-xMoxB2±z coatings deposited by DCMS and HiPIMS</i> [Conference Presentation]. 51st International Conference on Metallurgical Coatings and Thin Films (ICMCTF 2025), San Diego, United States of America (the).</div>
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dc.identifier.uri
http://hdl.handle.net/20.500.12708/223737
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dc.description.abstract
A promising strategy for enhancing the limited fracture characteristics of sputtered transition metal diboride (TMB2) thin films, including hardness and fracture toughness, is the formation of ternary diborides. Theoretical predictions based on density functional theory (DFT) indicate that Mo alloying in TiB₂+z may prove beneficial in reducing the inherent brittleness of such diboride coatings. The present study aims to provide experimental investigations of ternary Ti1-xMoxB2±z coatings prepared by direct current magnetron sputtering (DCMS) and high-power impulse magnetron sputtering (HiPIMS) to validate the predictions and to investigate the influence of different deposition techniques.
A series of coatings was deposited using target compositions of TiB₂/C 99/1 wt. %, TiB₂/MoB 95/5 mol %, and TiB₂/MoB 90/10 mol %, resulting in coating compositions ranging from 0 at. % Mo to 4.7 at. % Mo. A variety of analytical techniques, including transmission electron microscopy (TEM), scanning electron microscopy (SEM), and X-ray diffraction analysis (XRD), were employed to characterize the microstructural properties. The chemical composition was determined by inductively coupled plasma optical emission spectroscopy (ICP-OES). To investigate the micromechanical properties of the ternary Ti1-xMoxB2±z coatings, including hardness, fracture toughness, and fracture strength, nanoindentation, in-situ cantilever bending tests, and micropillar compression tests were employed.
The present study demonstrates that HiPIMS processes result in a considerable enhancement of hardness, fracture toughness, and fracture strength compared to DCMS. Specifically, the hardness of the HiPIMS coatings was enhanced from 38.8 ± 1.7 GPa to 43.7 ± 1.2 GPa, while the fracture toughness increased by 0.4 MPa√m and the Rp0.2 value rose by approximately 2 GPa. In comparison, the DCMS coatings exhibited a consistent decline in mechanical properties with increasing Mo content. Our findings highlight the significance of the energetics of growth conditions for novel ternary diboride systems.
en
dc.description.sponsorship
Christian Doppler Forschungsgesells
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dc.language.iso
en
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dc.subject
PVD coatings
en
dc.subject
Diborides
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dc.subject
alloying elements
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dc.title
Micromechanical properties of Ti1-xMoxB2±z coatings deposited by DCMS and HiPIMS
en
dc.type
Presentation
en
dc.type
Vortrag
de
dc.contributor.affiliation
TU Wien, Austria
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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.contributor.affiliation
Oerlikon (Liechtenstein), Liechtenstein
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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
