Effect of mechanical properties of substrate and coating on wear performance of TiN- or DLC-coated 316LVM stainless steel
Ładowanie...
Data
2017
Inny tytuł
Typ
Artykuł recenzyjny
Redaktor
dc.contributor.advisor
Dyscyplina PBN
Informatyka techniczna i telekomunikacja
Czasopismo lub seria
Wear
ISSN
0043-1648
ISBN
DOI
10.1016/j.wear.2017.04.017
Strona internetowa
Wydawca
Wydawca
Wydanie
Numer
Strony od-do
Tytuł monografii
item.page.defence
Tytuł tomu
Opis
Rodzaj licencji
Abstrakt (en)
In order to improve the tribological properties of 316LVM medical grade stainless steel, TiN and DLC coatings
were deposited. The TiN coating was prepared by CAE-PVD (Cathodic Arc Evaporation), whereas DLC was
deposited by the PACVD (Plasma-Assisted Chemical Vapor Deposition) technique. Surface roughness, nanohard ness, and anti-wear performance for both coated and unmodified specimens, as well as adhesion of the coatings
were evaluated. The results show that the HCOATING/ECOATING and ECOATING/ESUBSTRATE ratios significantly affect
the anti-wear and scratch performance of the thin coatings. As a result, remarkably different wear and cracking
patterns are observed for the two thin films. In wear tests, the prevalent wear mechanisms of TiN coating are
tribochemical wear, oxidation of wear debris and counter material transfer. However, the DLC coating
undergoes wear by ploughing induced by small patches of the film detached from the substrate. What is more,
in scratch tests, for the DLC coating a deformation regime of six stages was found to operate on the basis of OM
and SEM observations, whereas for TiN coating four main cracking stages were registered. Nevertheless, despite
its unsatisfactory performance in wear tests, in scratch tests, TiN provides better adhesion to the substrate than
DLC