Tribological comparison of different C-based coatings in lubricated and unlubricated conditions

Ciarsolo, I.; Fernández, X.; Gopegui, U. Ruiz de; Zubizarreta, C.; Abad, M.D.; Mariscal, Antonio Joaquín Franco; Caretti, Ignacio; Jiménez, I.; Sánchez-López, J.C.

doi:10.1016/j.surfcoat.2014.07.068

Cited by 9 publications

(4 citation statements)

References 32 publications

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“…The authors concluded that a high load-bearing capacity of the coatings is required to withstand such harsh tribological test conditions. This load-bearing capacity is related to hardness and mechanical properties (i.e., Young's modulus), with the volume fraction of (hard) crystalline and (softer, more ductile) amorphous phases, and the ability to form a graphitic-type transfer layer in the contact zone with low shear strength [97]. These conclusions point both towards the technological potential and the challenge of tailoring properties and performance of such carbon-based coatings.…”

Section: Introductionmentioning

confidence: 99%

Wear Study of a Magnetron-Sputtered TiC/a-C Nanocomposite Coating under Media-Lubricated Oscillating Sliding Conditions

Schneider

Ulrich

Patscheider³

et al. 2022

Coatings

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Friction and wear performance of non-reactively magnetron-sputtered hydrogen-free TiC/a-C coatings were characterized under lubricated oscillating sliding conditions against 100Cr6 steel. The friction mediators, isooctane, ethanol and distilled water, were chosen to address the actual trend of environmentally friendly green technologies in mobility and the potential use of carbon-based nanocomposite thin film materials for tribocomponents in contact with gasoline and alternative biofuels. Sliding pairs of the TiC/a-C coatings showed significantly reduced friction and wear compared to the reference materials under both unlubricated and lubricated conditions (when using the aforementioned media isooctane, ethanol and distilled water). Quasi-stationary friction coefficient of the TiC/a-C sliding pairs after running-in was almost independent of test conditions and could be traced back to self-lubrication as a result of the formation of a transfer layer on the steel counter body. Wear of the coatings based on micro-abrasion and tribochemical reaction was significantly influenced by the environmental conditions. Lowest wear was measured after tests in non-polar isooctane whereas highest wear was measured after tests in water.

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Section: Introductionmentioning

confidence: 99%

Wear Study of a Magnetron-Sputtered TiC/a-C Nanocomposite Coating under Media-Lubricated Oscillating Sliding Conditions

Schneider

Ulrich

Patscheider³

et al. 2022

Coatings

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“…Los ensayos pin on disk exhibieron coeficientes de fricción estables para las tres temperaturas de pretratamiento, indicando un desgaste abrasivo sin restos adheridos a los surcos. Los residuos actuaron como autolubricantes, provenientes de partículas de carbono con configuración grafítica (sp 2 ) desprendidas durante la prueba, como se señala en estudios previos [252][253]. Estos estudios indican una reducción significativa de la fricción para los recubrimientos DLC WC:C no lubricados en comparación con otros recubrimientos ensayados, con reducciones desde 0,22 hasta valores cercanos a 0,12 para los recubrimientos WC:C [252].…”

Section: Discusión De Resultadosunclassified

“…Los residuos actuaron como autolubricantes, provenientes de partículas de carbono con configuración grafítica (sp 2 ) desprendidas durante la prueba, como se señala en estudios previos [252][253]. Estos estudios indican una reducción significativa de la fricción para los recubrimientos DLC WC:C no lubricados en comparación con otros recubrimientos ensayados, con reducciones desde 0,22 hasta valores cercanos a 0,12 para los recubrimientos WC:C [252]. Los residuos autolubricantes pueden depositarse en los valles de la rugosidad superficial, facilitando su retención y reduciendo el área de contacto entre las superficies en movimiento.…”

Section: Discusión De Resultadosunclassified

“…La densidad del plasma superficial y su influencia en la implantación del nitrógeno supusieron un aumento de la rugosidad. La posible reducción de la rugosidad podría lograrse mediante el uso de voltajes positivos más elevados o al obtener rugosidades menores en el proceso de pulimento inicial [252]. Del mismo modo, al aumentar la rugosidad, el error a la hora de realizar la medición también se incrementó.…”

Section: Ensayo De Nanoindentaciónunclassified

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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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Does the Use of Diamond‐Like Carbon Coating and Organophosphate Lubricant Additive Together Cause Excessive Tribochemical Material Removal?

Zhou

Leonard

Meyer

et al. 2015

Adv Materials Inter

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Tribological comparison of different C-based coatings in lubricated and unlubricated conditions

Cited by 9 publications

References 32 publications

Wear Study of a Magnetron-Sputtered TiC/a-C Nanocomposite Coating under Media-Lubricated Oscillating Sliding Conditions

Wear Study of a Magnetron-Sputtered TiC/a-C Nanocomposite Coating under Media-Lubricated Oscillating Sliding Conditions

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

Does the Use of Diamond‐Like Carbon Coating and Organophosphate Lubricant Additive Together Cause Excessive Tribochemical Material Removal?

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