Silver diffusion and high-temperature lubrication mechanisms of YSZ–Ag–Mo based nanocomposite coatings

Hu, Jianjun; Muratore, Christopher; Voevodin, Andrey A.

doi:10.1016/j.compscitech.2006.09.008

Cited by 144 publications

(63 citation statements)

References 36 publications

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“…9b) as well as the changes observed in sample Ag13 suggest that silver is segregating in the coating surface. The surface segregation of Ag has been reported by several authors; however this process occurred at higher temperatures [35,37,38,39,40]. The surface segregation of silver is attributed to the low miscibility of this noble metal in different coatings [37] associated with the reduction in the system surface energy, which drives the segregation process.…”

Section: Accepted M Manuscriptmentioning

confidence: 97%

“…The surface segregation of Ag has been reported by several authors; however this process occurred at higher temperatures [35,37,38,39,40]. The surface segregation of silver is attributed to the low miscibility of this noble metal in different coatings [37] associated with the reduction in the system surface energy, which drives the segregation process. In the case of DLC matrix it seems that surface segregation occurs even at room temperature, however a more detailed study of this topic is needed in order to better understand the stability of Ag-DLC system.…”

Section: Accepted M Manuscriptmentioning

confidence: 97%

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Influence of Ag content on mechanical and tribological behavior of DLC coatings

Manninen

Ribeiro

Escudeiro

et al. 2013

Surface and Coatings Technology

101

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Ag-DLC coatings with Ag contents ranging from 1.3 at.% to 13.1 at.% were deposited by DC magnetron sputtering. The coatings were characterized with respect to their structure (by means of XRD and Raman Spectroscopy), mechanical and tribological properties (by scratch test, nanoindentation, residual stress measurements and pin-on-disk test). The incorporation of 13.1 at.% Ag resulted in the formation of Ag grains with 2-3 nm which promoted the increase of graphite like bonds organized in rings. Regarding the mechanical properties, no variations were found for films with Ag contents lower than 13 at.%; a reduction of both hardness and compressive residual stress were then observed for higher values. Pin-on-disk tests were performed at two different contact pressures (690 MPa and 1180 MPa) in dry sliding conditions against a zirconia counterpart. For the lower contact pressure the variations in the wear rate are well correlated with the coatings structure and mechanical properties, while for higher contact pressure the presence of Ag is relevant, Ag-DLC coatings showing higher wear rate than DLC one. SEM analysis revealed the formation of Ag aggregates on the wear track and adhesion of silver to the counterpart.

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Section: Accepted M Manuscriptmentioning

confidence: 97%

Section: Accepted M Manuscriptmentioning

confidence: 97%

Influence of Ag content on mechanical and tribological behavior of DLC coatings

Manninen

Ribeiro

Escudeiro

et al. 2013

Surface and Coatings Technology

101

View full text Add to dashboard Cite

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“…The lifetime of a nanocomposite YSZ ± Ag ± Mo coating was even more prolonged after applying the TiN surface porous mask [112]. This approach made it possible to confine the transfer of lubricating silver into a coating surface and thereby to reduce the rate of its depletion at high temperatures.…”

Section: Coatings With the Adaptive Friction Mechanismmentioning

confidence: 86%

“…It was shown in Ref. [112] that a rise in Ag content up to 24 at.% allowed the friction coefficient to be reduced from $ 0X8 to even $ 0X24; however, the lifespan of the resultant coating did not exceed 4500 cycles (Fig. 9d).…”

Section: Coatings With the Adaptive Friction Mechanismmentioning

confidence: 99%

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Adaptive multicomponent nanocomposite coatings in surface engineering

Pogrebnjak¹,

Bagdasaryan²,

Pshyk³

et al. 2017

Phys.-Usp.

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Abstract. This paper reviews experimental research on nanocomposite protective coatings of various chemical compositions and structure. For adaptive multielement and multilayer systems with specific phase composition, structure, substructure, stress state, and high functional properties, formation conditions are considered; the behavior of such systems under extreme operating conditions and in tribological applications is examined; the structural, phase, and chemical composition are discussed as well as the hardness, friction and wear at elevated temperatures; and the adhesive strength of hierarchical protective coatings is analyzed. Finally, the adaptive behavior under different tribological test conditions of multifunctional, multilayer coatings as a function of their properties and structure is examined.

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Enthalpy‐Driven Self‐Healing in Thin Metallic Films on Flexible Substrates

Trost,

Lassnig,

Kreiml

et al. 2024

Advanced Materials

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Self‐healing microelectronics are needed for costly applications with limited or without access. They are needed in fields such as space exploration to increase lifetime and decrease both costs and the environmental impact. While advanced self‐healing mechanisms for polymers are numerous, practical ways for self‐healing in metal films have yet to be found. A concept for an autonomous intrinsic self‐healing metallic film system was developed, allowing the healing of cracks in metallic films on flexible substrates. The concept relies on stabilizing metastable thin films with high mixing enthalpy via segregation barriers. This allows the films to possess autonomous intrinsic self‐healing capabilities triggered by cracking at temperatures not detrimental to flexible microelectronics. The effect will be shown on metastable Mo1‐xAgx thin films, stabilized via a Mo segregation barrier. Without a segregation barrier, the system is known to exhibit spontaneous Ag particle formation on the surface. This property was controlled and directed to heal cracks and partially restore the electro‐mechanical properties of the multilayer system. This mechanism opens up the field of self‐healing thin metallic films that could profoundly impact the design of future microelectronics.This article is protected by copyright. All rights reserved

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Silver diffusion and high-temperature lubrication mechanisms of YSZ–Ag–Mo based nanocomposite coatings

Cited by 144 publications

References 36 publications

Influence of Ag content on mechanical and tribological behavior of DLC coatings

Influence of Ag content on mechanical and tribological behavior of DLC coatings

Adaptive multicomponent nanocomposite coatings in surface engineering

Enthalpy‐Driven Self‐Healing in Thin Metallic Films on Flexible Substrates

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