Czasopismo | INŻYNIERIA MATERIAŁOWA | Rocznik 2010 - zeszyt 3

Effect of Al and Iradditions on surface morphology and topography of FeCrNi coatings

Barbara Kucharska

nr katalogowy: 52685

The magnetron sputtering deposition (MSD) method belongs to the basic and the most important methods of depositing coatings in vacuum conditions, PVD [1÷3]. A very valuable advantage of this method is the possibility of depositing coatings, particularly those of complex chemical composition, in a broad range of thicknesses, starting from several angstroms. This method is successfully used for depositing coatings based on steels, also heat-resistant grades, which include 310S steel. In the chemical composition of this steel are the additions of Ni (~20%) and Cr (~25%) [4÷6]. For better resistance the chemical composition are enriched by addition of high melting elements [7, 8]. The properties of magnetron coatings depend on the sputtering process parameters, which influence the microstructure and the grain size of coatings [9, 10]. The essential purpose of applying coatings is to protect the substrate or to modify the properties of surface. This function can only be fulfilled by coatings that are tight and exhibit good adhesion to the substrate [11]. These conditions are applicable in particular to coatings intended for protection against corrosion in liquid solutions, as well as in high-temperature oxidation conditions [12÷15]. Also, in corrosion protection, surface smoothness plays an important role. Low surface roughness and the absence of surface defects inhibit the build-up of aggressive ions and deposits that might initiate pit corrosion [16]. The paper presents the investigation of the surface topography of magnetron coatings based on heat-resisting steel of 310S enriched Al and Ru additions. The AFM (Atomic Force Microscope), SEM (Scanning Electron Microscope), and profilometric techniques were used in the investigation. material Coatings of the composition of 310S heat-resisting steel, deposited on a substrate of the same steel by the magnetron sputtering method, were examined. The magnetron targets were two discs, eac[...]

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2010-3

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