%0 Journal Article
%A Bolbut, V.
%A Bogomol, I.
%A Loboda, P.
%A Krüger, M.
%T Microstructure and mechanical properties of a directionally solidified Mo-12Hf-24B alloy
%J Journal of alloys and compounds
%V 735
%@ 0925-8388
%C Lausanne
%I Elsevier
%M FZJ-2018-03917
%P 2324 - 2330
%D 2018
%X In the present paper we report on a new Mo-12Hf-24B (in at. %) alloy which was processed by crucible-free zone melting (ZM) from cold pressed elemental powders. The alloy was solidified using crystallization rates of 90 mm/h, 100 mm/h and 110 mm/h. SEM investigations of the zone molten alloys showed well-aligned arrangements of the microstructural constituents. XRD analyses revealed the following phases: MoSS, Mo2B, HfB and a new phase, which is provisionally indicated as Mo2HfBx. The phases Mo2B and Mo2HfBx have a preferred crystallographic orientation parallel to the growth direction. High temperature compression creep strength at about 1100 °C was evaluated and compared with the commonly used Ni-based superalloys CMSX-4 and CMSX-10 as well as a directionally solidified Mo-Si-B materials. In comparison to the reference alloys, the creep resistance of ZM Mo-Hf-B materials was found to be substantially improved due to the construction and anisotropic arrangement of the incorporated compound phases in these Mo-based alloy.
%F PUB:(DE-HGF)16
%9 Journal Article
%U <Go to ISI:>//WOS:000418518600284
%R 10.1016/j.jallcom.2017.11.352
%U https://juser.fz-juelich.de/record/849814