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

0510346 - ÚFM 2020 RIV CH eng J - Journal Article
Zábranský, L. - Souček, P. - Vašina, P. - Dugáček, J. - Sťahel, P. - Buršík, Jiří - Svoboda, Milan - Mikšová, Romana - Peřina, Vratislav - Balázsi, K. - Czigány, Z. - Buršíková, V.
Microstructural changes of amorphous Mo–B–C coatings upon thermal annealing.
Surface and Coatings Technology. Roč. 379, DEC (2019), č. článku 125052. ISSN 0257-8972
Institutional support: RVO:68081723 ; RVO:61389005
Keywords : magnetron sputtering * Mo2BC * Mo2C
OECD category: Condensed matter physics (including formerly solid state physics, supercond.); Condensed matter physics (including formerly solid state physics, supercond.) (UJF-V)
Impact factor: 3.784, year: 2019
Method of publishing: Limited access
https://www.sciencedirect.com/science/article/pii/S0257897219310436?via%3Dihub

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.
Permanent Link: http://hdl.handle.net/11104/0301129