<div class="csl-bib-body">
<div class="csl-entry">Fuger, C., Hahn, R., Zauner, L., Wojcik, T., Weiss, M., Limbeck, A., Hunold, O., Polcik, P., & Riedl, H. (2022). Anisotropic super-hardness of hexagonal WB₂±z thin films. <i>Materials Research Letters</i>, <i>10</i>(2), 70–77. https://doi.org/10.1080/21663831.2021.2021308</div>
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dc.identifier.issn
2166-3831
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dc.identifier.uri
http://hdl.handle.net/20.500.12708/139362
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dc.description.abstract
Transition metal diboride-based thin films are promising candidates to replace state-of-the-art protective and functional coating materials due to their unique properties. Here, we focus on hexagonal WB 2-z, showing that the AlB 2 structure is stabilized by B vacancies exhibiting its energetic minima at sub-stoichiometric WB 1.5. Nanoindentation reveals super-hardness of 0001 oriented α-WB 2-z coatings, linearly decreasing by more than 15 GPa with predominant 10 (Formula presented.) 1 orientation. This anisotropy is attributed to differences in the generalized stacking fault energy of basal and pyramidal slip systems, highlighting the feasibility of tuning mechanical properties by crystallographic orientation relations.
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dc.description.sponsorship
CDG Christian Doppler Forschungsgesellschaft
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dc.language.iso
en
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dc.publisher
Taylor & Francis
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dc.relation.ispartof
Materials Research Letters
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dc.rights.uri
http://creativecommons.org/licenses/by/4.0/
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dc.subject
anisotropy
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dc.subject
DFT
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dc.subject
physical vapour deposition
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dc.subject
structural defects
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dc.subject
super-hardness
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dc.subject
WB 2
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dc.title
Anisotropic super-hardness of hexagonal WB₂±z thin films
