Artículos de revistas
Enhanced tribological properties of Y/MoS2 composite coatings prepared by chemical vapor deposition
Fecha
2020Registro en:
Ceramics International Volumen: 46 Número: 15 Páginas: 23813-23819 Oct 15 2020
10.1016/j.ceramint.2020.06.157
Autor
Yi, J.
Li, M. L.
Zhou, H. X.
Rosenkranz, Andreas
Wang, B.
Song, H.
Jiang, N.
Institución
Resumen
Chemical vapor deposition (CVD) is an efficient approach to prepare coatings on complex cutting tools.
However, MoS2 with self-lubrication ability and excellent tribological properties fabricated by CVD
have been rarely reported in literature. The aim of this study was to deposit pure MoS2 coatings and
yttrium (Y) doped MoS2 (Y/MoS2) composite coatings on cemented carbide blades coated with titanium
nitride by CVD. The structural and mechanical properties of the coatings were examined by scanning
electron microscopy (SEM) and nanoindentation, respectively. The results demonstrated that the
microstructure of Y/MoS2 composite coatings was denser than that of the pure MoS2 coating. The
hardness and the adhesional properties were significantly enhanced for the Y/MoS2 composite coatings.
The tribological performance of the as-deposited coatings were investigated under atmospheric
environment. Y/MoS2 compostite coatings demonstrated an enhanced tribological performance with a
stable and low coefficient of friction (COF) over the entire sliding time. In contrast, the COF of pure
MoS2 coating dramatically increased to value above 0.3 after a sliding time of only 30 min.
Additionally, the Y/MoS2 composite coatings showed a decreased wear rate (8.36 +/- 0.29 x 10(-7)
mm(3)/Nm) compared to the pure MoS2 coatings (3.41 +/- 0.48 x 10(-5) mm(3)/Nm) thus reflecting an
improvement by two order of magnitude.