The tribological properties of DLC/SiC and DLC/Si3N4 under different relative humidity: The transition from abrasive wear to tribo-chemical reaction

Xu, Ping; Wang, Yan; Cao, Xueqian; Nie, Xiangfan; Yue, Wen; Zhang, Guangan

doi:10.1016/j.ceramint.2020.09.252

Cited by 25 publications

(4 citation statements)

References 40 publications

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“…The DLC coatings demonstrated a load withstanding capacity that was approximately eight times larger than that of black chrome plating. Delamination loads of DLC coating was roughly the same value as other research paper [ 30 ]. In addition, delamination loads of DLC coating was higher than other materials [ 31 ].…”

Section: Resultssupporting

confidence: 75%

Surface Reformation of Medical Devices with DLC Coating

Kaneko

Hiratsuka²,

Alanazi

et al. 2021

Materials

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We evaluated the adhesion, friction characteristics, durability against bodily acids, sterilization, cleaning, and anti-reflection performance of diamond-like carbon (DLC) coatings formed as a surface treatment of intracorporeal medical devices. The major coefficients of friction during intubation in a living body in all environments were lower with DLC coatings than with black chrome plating. DLC demonstrated an adhesion of approximately 24 N, which is eight times stronger than that of black chrome plating. DLC-coated samples also showed significant stability without being damaged during acid immersion and high-pressure steam sterilization, as suggested by the results of durability tests. In addition, the coatings remained unpeeled in a usage environment, and there was no change in the anti-reflection performance of the DLC coatings. In summary, DLC coatings are useful for improving intracorporeal device surfaces and extending the lives of medical devices.

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Section: Resultssupporting

confidence: 75%

Surface Reformation of Medical Devices with DLC Coating

Kaneko

Hiratsuka²,

Alanazi

et al. 2021

Materials

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“…%) showed high friction and wear and that their different adhesion strengths to a-C:H determine the transfer film formation on the ceramics and thus the frictional behavior. However, despite previous experimental efforts − to understand tribological properties of the unlubricated Si 3 N 4 /a-C:H interface, the detailed mechanisms underlying the transfer film formation and under which conditions it occurs remain elusive.…”

Section: Introductionmentioning

confidence: 99%

Superlubricity of Silicon-Based Ceramics Sliding against Hydrogenated Amorphous Carbon in Ultrahigh Vacuum: Mechanisms of Transfer Film Formation

Kuwahara,

Long,

Sayilan

et al. 2024

ACS Appl. Mater. Interfaces

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Tribological interfaces between silicon-based ceramics, such as Si 3 N 4 or SiC, are characterized by high friction and wear in unlubricated conditions. A solution to this problem is to use them in combination with a hydrogenated amorphous carbon (a-C:H) countersurface from which a passivating carbon film is transferred onto the ceramic surface. However, the mechanisms underlying a stable film transfer process and the conditions that favor it remain elusive. Here, we present friction experiments in ultrahigh vacuum in which friction coefficients lower than 0.01 are achieved by sliding Si 3 N 4 against a-C:H with 36 at. % hydrogen but not against a-C:H with 20 at. % hydrogen. Chemical surface analyses confirm that the superlubric interface forms via the transfer of a hydrocarbon nanofilm onto the Si 3 N 4 surface. Quantum-mechanical simulations reveal that a stable passivating a-C:H film can only be transferred if, after initial cold welding of the tribological interface, the plastic shear deformation is localized within the a-C:H coating. This occurs if the yield shear stress for plastic flow of a-C:H is lower than that of the ceramic and of the shear strength of the a-C:H-ceramic interface, i.e., if the a-C:H hydrogen content ranges between ∼30 and ∼50 at. %. While the importance of a relatively high hydrogen content to achieve an efficient passivation of a-C:H surfaces in a vacuum is well-documented, this work reveals how the hydrogen content is also crucial for obtaining a stable a-C:H transfer film. These results can be extended to glass, SiC, and steel, supporting the generality of the proposed mechanism.

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“…The SiC ring with the thickness of 4 mm, the inner diameter of 50 mm and the outer diameter of 70 mm was adopted. The physical properties of SiC are illustrated in Table 1 22,23 . The lubricating medium of 32 # mechanical oil produced by Kimlee Co., Ltd which commonly used in sealing condition was selected.…”

Section: Preparationsmentioning

confidence: 99%

“…The physical properties of SiC are illustrated in Table 1. 22,23 The lubricating medium of 32# mechanical oil produced by Kimlee Co., Ltd which commonly used in sealing condition was selected. The density of the lubricating oil is 830 kg/m 3 and the dynamic viscosity can be calculated according to the Equation (1).…”

Section: Experimental Materialsmentioning

confidence: 99%

Numerical simulation and experimental investigation on tribological performance of SiC surface with squamous groove micro texture

Li²,

Hao

et al. 2022

Lubrication Science

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To improve the tribological characteristics of the face seal, the squamous groove micro textures with different area proportion and the circular dimple micro texture were designed and manufactured. The disc-disc friction and wear experiments and numerical simulation were carried out in oil lubrication. The pressure distribution, friction coefficient, fluid temperature and wear morphology are investigated. The study show that the friction coefficients of the micro textured and untextured samples decline with the increase of load, but first increase and then decrease with the rise of rotational speed. Micro textured samples could decline the friction coefficient effectively, and the asymmetric structure in the lubricant inflow and outflow region of the squamous groove micro texture makes it have better tribological performance. In addition, the micro texture can increase heat dissipation area, reduce heat production and collect wear debris, which could modify the lubricant temperature and wear morphology effectively.

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The tribological properties of DLC/SiC and DLC/Si3N4 under different relative humidity: The transition from abrasive wear to tribo-chemical reaction

Cited by 25 publications

References 40 publications

Surface Reformation of Medical Devices with DLC Coating

Surface Reformation of Medical Devices with DLC Coating

Superlubricity of Silicon-Based Ceramics Sliding against Hydrogenated Amorphous Carbon in Ultrahigh Vacuum: Mechanisms of Transfer Film Formation

Numerical simulation and experimental investigation on tribological performance of SiC surface with squamous groove micro texture

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