Reprint of “ Influence of Reduced Current Density on Diffusion and Phase Formation during PIII Nitriding of Austenitic Stainless Steel and CoCr Alloys”

Mändl, S.; Lutz, J.; Dı́az, Cristina; Gerlach, Jürgen W.; Garcı́a, J.A.

doi:10.1016/j.surfcoat.2014.06.025

Cited by 10 publications

(3 citation statements)

References 38 publications

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“…Some samples were subjected to high-energy pulsed-plasma immersion pretreatment in a chamber as shown in Figure 1 prior to their DLC coating to compare their properties with the samples coated only with DLC. The PIII experiments were performed in a UHV system designed and built at IOM in Leipzig, Germany [28,29]. In the references, further information showing a complete schematic drawing of the system is available.…”

Section: Plasma Ion Immersion Implantationmentioning

confidence: 99%

Improved Adhesion of the DLC Coating Using HiPIMS with Positive Pulses and Plasma Immersion Pretreatment

Gómez

Claver

Santiago³

et al. 2021

Coatings

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Diamond-like carbon (DLC) coatings are used due to their extraordinary tribomechanical properties, great hardness, high elastic modulus, high wear resistance, low friction coefficient and chemical inertness, which provide them with biocompatibility. Compared to other physical vapor deposition (PVD) coatings of transition nitrides and carbonitrides, DLC has limited adhesion, so it is necessary to develop new techniques to overcome this limitation. This work reports the results of scratch testing for the measurement of adhesion and of tests for wear resistance and nanoindentation in AISI 316L stainless steel coated with a WC:C coating, produced using novel high-power impulse magnetron sputtering (HiPIMS) technology with positive pulses. In addition, the use of a preceding surface modification technique, specifically plasma immersion ion implantation (PIII), was studied with the aim of optimizing the adhesion of the coating. The results show how the coating improved the tribomechanical properties through the use of positive pulse HiPIMS compared to conventional HiPIMS, with an adhesion result that reached critical load values of 48.5 N and a wear coefficient of 3.96 × 10−7 mm3/nm.

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Section: Plasma Ion Immersion Implantationmentioning

confidence: 99%

Improved Adhesion of the DLC Coating Using HiPIMS with Positive Pulses and Plasma Immersion Pretreatment

Gómez

Claver

Santiago³

et al. 2021

Coatings

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show abstract

“…La generación de austenita expandida se tradujo en una red aproximadamente un 5-12% más grande que la austenita inicial, como se evidencia en los picos (111) y (200) de los ensayos XRD [200]. La relación lineal entre la concentración superficial de nitrógeno y la expansión de la red en aceros inoxidables, estudiada por Mändl et al [130], sugiere una correlación directa.…”

Section: Discusión De Resultadosunclassified

“…Los procesos de nitruración a alta temperatura llegaron a introducir tensiones residuales en el material, lo que alteró la posición de los picos de difracción en el análisis XRD [69]. El crecimiento de la capa nitrurada a temperaturas más altas permitió que crecieran más rápido o adquirir una mayor densidad, lo que también influyo en la posición de los picos de difracción [130].…”

Section: Difracción De Rayos Xunclassified

Nuevas tecnologías de tratamiento dúplex para la mejora de la adherencia de recubrimientos DLC sobre acero inoxidable austenítico

Gómez Alonso

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AISI 316L austenitic stainless steel has become pivotal in both industrial and biomedical applications due to its outstanding corrosion resistance and durability in harsh environments. The composition of this steel, which comprises chromium, nickel, and molybdenum, provides exceptional chemical stability and toughness, making it the leading choice for challenging scenarios. Innovative techniques have been investigated to further improve the capabilities of DLC coating on a versatile material. Among them, the high-power pulsed magnetron sputtering (HiPIMS) method, utilizing positive pulses on AISI 316L austenitic stainless steel, has shown great potential in enhancing the surface properties of the material. Positive pulse HiPIMS coatings provide significant benefits over traditional methods, particularly in their capacity to produce thin layers with high ionic current density and greater impact energy. Consequently, these coatings exhibit enhanced adhesion and a dense coating structure, yielding superior mechanical and tribological properties. To optimize stainless steels wear resistance and properties, the plasma immersion ion implantation (PIII) technique has been adopted. This approach facilitates the development of gradients of hardness on the surface of the substrate, thereby enhancing the material's resistance against abrasive forces and culminating in prolonged durability under frictional conditions. The utilization of shielded plasma nitriding (ASPN) results in substantial enhancement of the DLC coating's adhesion. This method enables the creation of a nitrided layer at the interface between the coating and substrate, which enhances their bond and offers extra protection against early separation. Including substrates produced by additive manufacturing techniques introduces a fresh approach to enhancing the properties of stainless steel. Despite a slight decrease in certain properties when compared to previous treatments, the implementation of duplex treatments with shielded plasma nitriding has been found to be particularly advantageous in this specific context. Ultimately, the primary contribution made by this thesis around duplex treatments focuses on the utilization of DLC WC:C coating techniques via positive pulse HiPIMS, and the introduction of hardness gradients through PIII and ASPN processes. The study conducted the techniques on substrates made via additive manufacturing technologies. Its aim was to enhance the mechanical and tribological characteristics of DLC coatings, thereby significantly improving the surface properties of AISI 316L austenitic stainless steel. This approach strengthens the adhesion of the coatings and offers new perspectives for industrial and biomedical applications.

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Nitriding Effect on HVAF FeMnCrSi Coating

et al. 2023

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Reprint of “ Influence of Reduced Current Density on Diffusion and Phase Formation during PIII Nitriding of Austenitic Stainless Steel and CoCr Alloys”

Cited by 10 publications

References 38 publications

Improved Adhesion of the DLC Coating Using HiPIMS with Positive Pulses and Plasma Immersion Pretreatment

Improved Adhesion of the DLC Coating Using HiPIMS with Positive Pulses and Plasma Immersion Pretreatment

Nuevas tecnologías de tratamiento dúplex para la mejora de la adherencia de recubrimientos DLC sobre acero inoxidable austenítico

Nitriding Effect on HVAF FeMnCrSi Coating

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