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Publications in Scientific Journals:

C. Fuger, V. Moraes, R Hahn, H. Bolvardi, P. Polcik, H. Riedl, P.H. Mayrhofer:
"Influence of Tantalum on phase stability and mechanical properties of WB2";
MRS Communications, 9 (2019), 1; 375 - 380.



English abstract:
Based on density functional theory, we recently suggested that metastable α-WB2 is a promising candidate combining very high hardness with high toughness. These calculations further suggested that the addition of Tantalum supports the crystallization of α-structured W1−xTaxB2−z, with only minor reduction in toughness. Thus, various Ta containing WB2-based coatings have been synthesized using physical vapor deposition. With increasing Ta content, the hardness increases from ~41 GPa (WB2) to ~45 GPa (W0.74Ta0.26B2). In situ micromechanical cantilever bending tests exhibit fracture toughness KIC values of 3.7 to 3.0 MPa√m for increasing Ta content (single-phased up to 26 at.% Ta).


"Official" electronic version of the publication (accessed through its Digital Object Identifier - DOI)
http://dx.doi.org/10.1557/mrc.2019.5


Created from the Publication Database of the Vienna University of Technology.