Refractory transition-metal diborides (TMB 2) are candidates for extreme environments due to melting points above 3000° C, excellent hardness, good chemical stability, and thermal …
Non-reactive magnetron sputtering of a diboride target composed of HfB 2, TaB 2, VB 2, W 2 B 5, and ZrB 2 with equimolar composition leads to the formation of crystalline single-phase …
We systematically study the oxidation properties of sputter-deposited TiB 2.5 coatings up to 700° C. Oxide-scale thickness d ox increases linearly with time ta for 300, 400, 500, and …
T Glechner, HG Oemer, T Wojcik, M Weiss… - Surface and Coatings …, 2022 - Elsevier
The concept of Si alloyed transition metal (TM) diborides–well explored for bulk ceramics–is studied for five different physical vapor deposited TM-Si-B 2ąz (TM= Ti, Cr, Hf, Ta, W) …
Inherent brittleness, which easily leads to crack formation and propagation during use, is a serious problem for protective ceramic thin-film applications. Superlattice architectures, with …
C Fuger, R Hahn, L Zauner, T Wojcik… - Materials Research …, 2022 - Taylor & Francis
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 …
R Hahn, N Koutná, T Wójcik, A Davydok… - Communications …, 2020 - nature.com
Machining and forming tools exposed to challenging environments require protective coatings to extend their lifetime and reliability. Although transition metal nitrides possess …
In this study, we have used density functional theory (DFT) calculations to characterize if and how defects influence the stability and electronic/mechanical properties of MB 2 (AlB 2-type) …
We recently showed that sputter-deposited Zr 1-x Ta x B y thin films have hexagonal AlB 2- type columnar nanostructure in which column boundaries are B-rich for x< 0.2, while Ta-rich …