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Unraveling the supe...
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Hahn, R.TU Wien, Christian Doppler Lab Surface Engn High Performan, Getreidemarkt 9, A-1060 Vienna, Austria.
(author)
Unraveling the superlattice effect for hexagonal transition metal diboride coatings
- Article/chapterEnglish2023
Publisher, publication year, extent ...
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Elsevier,2023
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Numbers
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LIBRIS-ID:oai:DiVA.org:uu-508166
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https://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-508166URI
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https://doi.org/10.1016/j.scriptamat.2023.115599DOI
Supplementary language notes
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Language:English
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Summary in:English
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Subject category:ref swepub-contenttype
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Subject category:art swepub-publicationtype
Notes
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Superlattice structures enable the simultaneous enhancement in hardness (H) and fracture toughness (KIC) of ceramic-like coatings. While a deeper understanding of this effect has been gained for fcc-structured transition metal nitrides (TMN), hardly any knowledge is available for hexagonal diborides (TMB2). Here we show that superlattices can-similarly to nitrides-increase the hardness and toughness of diboride films. For this purpose, we deposited TiB2/WB2 and TiB2/ZrB2 superlattices with different bilayer periods (?) by non-reactive sputtering. Nanoindentation and in-situ microcantilever bending tests yield a distinct H peak for the TiB2/WB2 system (45.5 & PLUSMN; 1.3 GPa for ? = 6 nm) but no increase in KIC related to a difference in shear moduli (112 GPa). Contrary, the TiB2/ZrB2 system shows no peak in H, but for KIC with 3.70 & PLUSMN; 0.26 MPa & BULL;m1/2 at ? = 4 nm originating from differences in lattice spacing (0.14 & ANGS;), hence causing coherent stresses retarding crack growth.
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Tymoszuk, A. A.TU Wien, Christian Doppler Lab Surface Engn High Performan, Getreidemarkt 9, A-1060 Vienna, Austria.
(author)
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Wojcik, T.TU Wien, Christian Doppler Lab Surface Engn High Performan, Getreidemarkt 9, A-1060 Vienna, Austria.
(author)
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Ntemou, EleniUppsala universitet,Tillämpad kärnfysik(Swepub:uu)elent817
(author)
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Hunold, O.Oerlikon Surface Solut AG, Oerlikon Balzers, FL-9496 Balzers, Liechtenstein.
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Polcik, P.Plansee Composite Mat GmbH, D-86983 Lechbruck, Germany.
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Kolozsvari, S.Plansee Composite Mat GmbH, D-86983 Lechbruck, Germany.
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Primetzhofer, DanielUppsala universitet,Tillämpad kärnfysik(Swepub:uu)danpr521
(author)
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Mayrhofer, P. H.TU Wien, Inst Mat Sci & Technol, A-1060 Vienna, Austria.
(author)
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Riedl, H.TU Wien, Christian Doppler Lab Surface Engn High Performan, Getreidemarkt 9, A-1060 Vienna, Austria.;TU Wien, Inst Mat Sci & Technol, A-1060 Vienna, Austria.
(author)
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TU Wien, Christian Doppler Lab Surface Engn High Performan, Getreidemarkt 9, A-1060 Vienna, Austria.Tillämpad kärnfysik
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In:Scripta Materialia: Elsevier2351359-64621872-8456
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Hahn, R.
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Tymoszuk, A. A.
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Wojcik, T.
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Ntemou, Eleni
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Hunold, O.
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Polcik, P.
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Kolozsvari, S.
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Primetzhofer, Da ...
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Mayrhofer, P. H.
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Riedl, H.
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Uppsala University