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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 ...

  • Elsevier,2023
  • electronicrdacarrier

Numbers

  • LIBRIS-ID:oai:DiVA.org:uu-508166
  • https://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-508166URI
  • https://doi.org/10.1016/j.scriptamat.2023.115599DOI

Supplementary language notes

  • Language:English
  • Summary in:English

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  • Subject category:ref swepub-contenttype
  • Subject category:art swepub-publicationtype

Notes

  • 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.

Subject headings and genre

Added entries (persons, corporate bodies, meetings, titles ...)

  • Tymoszuk, A. A.TU Wien, Christian Doppler Lab Surface Engn High Performan, Getreidemarkt 9, A-1060 Vienna, Austria. (author)
  • Wojcik, T.TU Wien, Christian Doppler Lab Surface Engn High Performan, Getreidemarkt 9, A-1060 Vienna, Austria. (author)
  • Ntemou, EleniUppsala universitet,Tillämpad kärnfysik(Swepub:uu)elent817 (author)
  • Hunold, O.Oerlikon Surface Solut AG, Oerlikon Balzers, FL-9496 Balzers, Liechtenstein. (author)
  • Polcik, P.Plansee Composite Mat GmbH, D-86983 Lechbruck, Germany. (author)
  • Kolozsvari, S.Plansee Composite Mat GmbH, D-86983 Lechbruck, Germany. (author)
  • Primetzhofer, DanielUppsala universitet,Tillämpad kärnfysik(Swepub:uu)danpr521 (author)
  • Mayrhofer, P. H.TU Wien, Inst Mat Sci & Technol, A-1060 Vienna, Austria. (author)
  • 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)
  • TU Wien, Christian Doppler Lab Surface Engn High Performan, Getreidemarkt 9, A-1060 Vienna, Austria.Tillämpad kärnfysik (creator_code:org_t)

Related titles

  • In:Scripta Materialia: Elsevier2351359-64621872-8456

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