Browsing by Author "Ybarra, Gabriel"
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Item Microstructure and wear behavior of DC-pulsed plasma nitrided AISI 316L austenitic stainless steel(2007) De Las Heras, Evangelina; Santamaria, Daniel González; García-Luis, Alberto; Cabo, Amado; Brizuela, Marta; Ybarra, Gabriel; Mingolo, Norma; Brühl, Sonia; Corengia, Pablo; TECNOLOGÍAS DE HIDRÓGENO; INGENIERÍA DE SUPERFICIES; GENERALAustenitic stainless steel are used in industrial applications, mainly due to their good corrosion resistance; however, their low hardness and poor wear performance impose strong limitations in many cases. In this work, the wear behavior of the unnitrided and DC-pulsed plasma nitrided AISI 316L stainless steel has been investigated using an Amsler-Disc-Machine under rolling-sliding contact conditions. The microstructure was studied by X-ray diffraction and the worn surface, subsurface, and wear debris were analyzed by optical microscopy, scanning electron microscopy, and microhardness testing. The obtained results show that pulsed plasma nitriding improves the wear resistance of the AISI 316L and different wear mechanisms were observed depending on the normal applied load.Item Surface modification by plasma-based processes(World Scientific Publishing Co., 2009-01-01) De Las Heras, Evangelina; Ybarra, Gabriel; Braceras, Iñigo; Corengia, Pablo; INGENIERÍA DE SUPERFICIES; GENERALIn this chapter, the use of plasma processes technology in the biomedical field is presented. The introduction focuses on plasmas and the associated techniques employed to modify surfaces of a wide variety of materials. The versatility of plasma-based treatments allows the design of special function-oriented surfaces for medical devices, which are presented next. An overview of the plasma-based thin films and surface treatments is included for a number of applications ranging from the improvement of mechanical properties and the modification of the surface chemistry of materials to regulate the interaction with living tissues, diagnostics, and drug delivery.