Publication details

Microstructural changes of amorphous Mo–B–C coatings upon thermal annealing

Authors

ZÁBRANSKÝ Lukáš SOUČEK Pavel VAŠINA Petr DUGÁČEK Ján SŤAHEL Pavel BURŠÍK Jiří SVOBODA Milan MIKŠOVÁ Romana PEŘINA Vratislav BALÁZSI Katalin CZIGÁNY Zsolt BURŠÍKOVÁ Vilma

Year of publication 2019
Type Article in Periodical
Magazine / Source Surface & coatings technology
MU Faculty or unit

Faculty of Science

Citation
Web https://www.sciencedirect.com/science/article/pii/S0257897219310436
Doi http://dx.doi.org/10.1016/j.surfcoat.2019.125052
Keywords Magnetron sputtering; Thermal stability; Mo–B–C coatings; Mo2BC; Mo2C
Description Several amorphous Mo–B–C coatings with wide range of compositions were subjected to thermal annealing to a final temperature of 1000 °C in UHV conditions. The nature of the induced recrystallization depended mostly on the Mo content in the coating. A higher Mo content resulted in a nanocrystalline Mo2C phase, a lower Mo content in a nanocrystalline Mo2BC phase and Mo content in-between resulted only in a near-amorphous microstructure. In all cases, the hardness and effective elastic modulus increased significantly after annealing up to values of 29 GPa and 500 GPa, respectively. The cobalt diffusion from the WC-Co substrates affected the lower parts of coatings forming a MoCoB interface.
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