Abstract

The effects of Mo/B atomic ratio ranging from 0.8 to 1.5 (Mo contents) on mechanical properties and phase formation were studied for cermets with the composition of Ni–5.0B–xMo– 3.5Cr–11.5V (wt%). A strong correlation between mechanical properties and phase formation was observed in the cermets. The cermets with somewhat higher stoichiometric Mo content, i.e., Mo/B ratios of 1.1 and 1.2, showed a very fine ideal two-phase microstructure with a homogeneous distribution of a tetragonal Mo2NiB2 (M3B2)-type complex boride in a solution-strengthened Ni base binder and hence exhibited an excellent transverse rupture strength (TRS) of more than 2.7 GPa and hardness of about 88 RA. In the cermets with low and high Mo/B ratios, another type of a complex boride, which was an orthorhombic M3B2 or a tetragonal M5B3 boride, was detected and was considered to deteriorate TRS due to a coarse-grained microstructure.

Full Text
Paper version not known

Talk to us

Join us for a 30 min session where you can share your feedback and ask us any queries you have

Schedule a call

Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.