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Mechanical and tribological properties of A-C:H/Ti coatings doped by silver using ion implantation and magnetron sputtering methods : abstract

Szymański W., Kołodziejczyk L., Batory D., Czerniak-Reczulska M., Bociaga D., Rajchel B.

Engineering of Biomaterials

2013

Vol. 16, no. 122-123 spec. iss.

Due to favorable mechanical, tribological and biomedical properties the carbon coatings are of interest of many branches of the industry [1]. Growing interest in Ag doped DLC coatings is observed within the space of the last several years. Both, well known antibacterial properties [2] of silver as well as a good biocompatibility [3] of carbon coatings constitute the outstanding solution for a variety of applications, especially for medical implants. The aim of this study was the evaluation of influence of silver onto the mechanical and tribological properties of nanocomposite DLC coatings. Carbon coatings were produced using a hybrid RFPACVD/MS method and silver ions were incorporated into carbon matrix. The processes consist of followed stages: synthesis of nanocomposite carbon (CVD) doped titanium coatings (PVD)[4] and next stage carbon (CVD) and silver deposition (PVD)or Ag ion implantation into carbon coating. Carbon layers synthesis was performed with use of the classic RF PACVD process in methane atmosphere whereas as the titanium ions source the pulsed magnetron sputtering (MS) process was applied. Second stage was performed in the same reaction chamber but the PVD process was carried out using the silver cathode. The ion implantation process was carried out with the use of silver ions with energy of 15 keV. In order to determine the influence of silver ion implantation process onto overall physiochemical properties of carbon coatings four ion doses of 2,4,7 and 10×1016Ag+/cm2 were applied. Due to application of the gradient of chemical composition of Ti–C it is possible to manufacture thick and well adherent carbon layers with a very good mechanical, tribological parameters and corrosion resistive. Application of silver as a doping material allowed modification of the mechanical and biological properties of manufactured layers depending on the silver amount (C:Ag ratio).

Effect of Al and Ir additions on FeCrNi coating's surface morphology and topography

Kucharska B.

Inżynieria Materiałowa

2010

Vol. 31, nr 3

358-361

The morphology and roughness of FeCrNi coatings based on 310S heat-resisting steel enriched with Al and Ir. Coatings were deposited on a substrate of the same steel by the magnetron sputtering method. The investigation of surfaces was carried out using the scanning microscope and atomic force microscope. The roughness measurement along 12 ?m long sections and from areas up to 100 ?m2 was performed. It was found that the additions of Al and Ir had the effect of changing the morphology and reducing the size of crystallites. The addition of both 2.3% Al and 3.7% Ir reduces the coating roughness, respectively, by up to approx. 25 and 50% compared to the coating without additions. No relationship between roughness of coatings and their thicknesses was found.

W pracy przedstawiono wyniki badań morfologii i chropowatości powłok FeCrNi o składzie chemicznym stali żaroodpornej 310S, wzbogaconych dodatkami Al i Ir. Powłoki osadzono metodą magnetronowego rozpylania na stalowym podłożu. Powierzchnię powłok badano za pomocą elektronowego mikroskopu skaningowego oraz mikroskopu sił atomowych. Pomiar chropowatości wykonano na odcinku 12 um i na obszarach o powierzchni do 100 um2. Stwierdzono, że dodatki Al i Ir zmieniają morfologię powłoki i powodują rozdrobnienie krystalitów. Zarówno dodatek 2,3% Al, jak i 3,7% Ir zmniejszają chropowatość powłoki odpowiednio do ok. 25 i 50% chropowatości powłoki bez dodatków. Nie stwierdzono zależności pomiędzy chropowatością powłok a ich grubością.