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<div class="csl-entry">Hirle, A. V., Fuger, C., Hahn, R., Wojcik, T., Kutrowatz, P., Weiss, M., Hunold, O., Kolozsvári, S., Polcik, P., & Riedl-Tragenreif, H. (2023, May 25). <i>The anisotropic behaviour of super-hard TiB₂ films studied by synchrotron nano-diffraction</i> [Poster Presentation]. 49th International Conference on Metallurgical Coatings & Thin Films 2023, San Diego, United States of America (the). http://hdl.handle.net/20.500.12708/189993</div>
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dc.identifier.uri
http://hdl.handle.net/20.500.12708/189993
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dc.description
[1] B. Hunter et al., Investigations into the slip behavior of zirconium diboride, J. Mater. Res. 31 (2016) 2749–2756.
[2] C. Fuger et al., Influence of Tantalum on phase stability and mechanical properties of WB2, MRS Communications. 9 (2019) 375–380.
[3] C. Fuger et al., Revisiting the origins of super-hardness in TiB2+z thin films – Impact of growth conditions and anisotropy, Surf. Coat. Technol. 446 (2022) 128806.
[4] P.H. Mayrhofer et al., Self-organized nanocolumnar structure in superhard TiB2 thin films, Appl. Phys. Lett. 86 (2005) 131909.
[5] J. Neidhardt et al., Experiment and simulation of the compositional evolution of Ti–B thin films deposited by sputtering of a compound target, J. Appl. Phys. 104 (2008) 063304.
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dc.description.abstract
For hexagonal structured materials, anisotropic properties are well known due to their specific lattice distortion with respect to basal and prismatic planes. In the case of magnetron sputtered transition metal diborides direction-dependent hardness was reported for WB2-z, ZrB₂, as well as for TiB₂ [1-3]. In more detail, the anisotropic behaviour of hexagonal AlB₂ structured diborides is explained by a more difficult dislocation movement due to energetically less preferred slip systems. For TiB2+z it was shown that a preferred crystal growth in 0001 direction predominates super-hardness (> 40 GPa) over any stoichiometry variations [3,4]. Furthermore, the growth orientation of TiB2+z is highly dependent on process parameters, especially the pressure, which was suggested by Neidhardt et al. [5] and experimentally confirmed in a recent publication [3].
For state-of-the art protective coatings not only a high hardness is beneficial, but also specifically low residual stress states are preferred. By varying the pressure during the growth of TiB2+x coatings, the mechanical properties have been tailored by structural adaptions throughout the film cross-section. In addition, the incorporation of metallic Ti interlayers is an interesting tool for stress management within these films. To study the progression of the stress sates as well as orientation relations throughout the film cross-section, X-ray nano-diffraction synchrotron experiments (beamline P03 at PETRA III) have been performed. Furthermore, the structure-mechanical properties were described by a broad set of characterization techniques such as SEM, Nanoindentation, or micro-mechanical testing techniques.
en
dc.description.sponsorship
Christian Doppler Forschungsgesells
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dc.language.iso
en
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dc.subject
Transition Metal Diborides
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dc.subject
Anisotropy
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dc.subject
Residual Stresses
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dc.subject
PVD
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dc.subject
Synchrotron Investigations
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dc.title
The anisotropic behaviour of super-hard TiB₂ films studied by synchrotron nano-diffraction
en
dc.type
Presentation
en
dc.type
Vortrag
de
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
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
