Titanium doped MoSe2 coatings - Synthesis, structure, mechanical and tribological properties investigation

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21230%2F21%3A00352121" target="_blank" >RIV/68407700:21230/21:00352121 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.1016/j.apsusc.2021.150990" target="_blank" >https://doi.org/10.1016/j.apsusc.2021.150990</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.apsusc.2021.150990" target="_blank" >10.1016/j.apsusc.2021.150990</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Titanium doped MoSe2 coatings - Synthesis, structure, mechanical and tribological properties investigation

Popis výsledku v původním jazyce

In this work, we doped sputtered MoSe2 coatings with Ti to improve their mechanical and tribological properties. Mo-Se-Ti coatings were prepared onto steel discs by High Target Utilisation Sputtering (HiTUS). The Ti was in the range 7-31 at.%, which led to Se/Mo ratios of 1.7-2.7. The Mo-Se-Ti coatings possessed a polycrystalline structure for the lower Ti contents and became amorphous when Ti content was above approx. 18 at.%. The hardness of the initially soft (0.3 GPa) pure MoSe2 coatings was dramatically improved with Ti additions (up to 7.5 GPa). Sliding experiments confirmed excellent tribological properties: coefficient of friction values from 0.02 to 0.08 and very low wear rates (8 x 10(8) mm(3)N(-1)m(-1)) of the Ti-containing coatings tested in the humid air at the loads in the range of 2-45 N. The outstanding self-lubricant properties of Mo-Se-Ti coatings were attributed to the transformation of the topmost amorphous part of the coating into crystalline MoSe2 tribofilm while preserving inner parts of the coating in as-deposited state ensuring good load-bearing capacity. There is strong experimental evidence that Ti has a gettering effect in the tribological contact, which protects MoSe2 tribofilm against oxidation.

Název v anglickém jazyce

Titanium doped MoSe2 coatings - Synthesis, structure, mechanical and tribological properties investigation

Popis výsledku anglicky

In this work, we doped sputtered MoSe2 coatings with Ti to improve their mechanical and tribological properties. Mo-Se-Ti coatings were prepared onto steel discs by High Target Utilisation Sputtering (HiTUS). The Ti was in the range 7-31 at.%, which led to Se/Mo ratios of 1.7-2.7. The Mo-Se-Ti coatings possessed a polycrystalline structure for the lower Ti contents and became amorphous when Ti content was above approx. 18 at.%. The hardness of the initially soft (0.3 GPa) pure MoSe2 coatings was dramatically improved with Ti additions (up to 7.5 GPa). Sliding experiments confirmed excellent tribological properties: coefficient of friction values from 0.02 to 0.08 and very low wear rates (8 x 10(8) mm(3)N(-1)m(-1)) of the Ti-containing coatings tested in the humid air at the loads in the range of 2-45 N. The outstanding self-lubricant properties of Mo-Se-Ti coatings were attributed to the transformation of the topmost amorphous part of the coating into crystalline MoSe2 tribofilm while preserving inner parts of the coating in as-deposited state ensuring good load-bearing capacity. There is strong experimental evidence that Ti has a gettering effect in the tribological contact, which protects MoSe2 tribofilm against oxidation.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20506 - Coating and films

Projekt

<a href="/cs/project/EF16_026%2F0008396" target="_blank" >EF16_026/0008396: Nové nanostruktury pro inženýrské aplikace umožněné kombinací moderních technologií a pokročilých simulací</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2021

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Applied Surface Science

ISSN

0169-4332

e-ISSN

1873-5584

Svazek periodika

568

Číslo periodika v rámci svazku

December

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

14

Strana od-do

—

Kód UT WoS článku

000700961700002

EID výsledku v databázi Scopus

2-s2.0-85113337618