Friction and wear performances of impregnated graphite in ring-on-ring tribological test

Zhao, Juying; Li, Yongjian; Liu, Ying; Huang, Weifeng; Xu, Yiren

doi:10.1016/j.triboint.2022.107715

Cited by 17 publications

(3 citation statements)

References 35 publications

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“…The influence of graphitization degree [27], test environment [28] and test configurations [29] on the tribological performance of various impregnated graphite materials has also been explored by researchers. Zhao et al [30] investigated the friction and wear mechanism of zinc-phosphate impregnated graphite against stainless steel by ring-on-ring configuration, and two different styles of worn taper angles on the worn surface could be observed. However, very few tribological studies are conducted using actual impregnated graphite components and the fundamental tests of graphite materials often fail to accurately replicate the operational state of these components.…”

Section: Introductionmentioning

confidence: 99%

Evaluation on frictional performance of three different oil-lubricated impregnated graphite seal rings for aircraft integrated drive generators

Qi,

Wang,

Zhang

et al. 2023

Mater. Res. Express

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The frictional performance of the shaft-end graphite seal rings plays a critical role in determining the maintenance-free duration of aircraft integrated drive generators, and significantly depends on the types of graphite materials used. In this study, three types of graphite materials, including epoxy resin, metal antimony and furan resin impregnated ones, were selected for evaluation using a rotating-type tribometer. The frictional test configuration involved an actual graphite seal ring sliding against the surface of a 12Cr2Ni4A disc under the lubrication of 4050 high-temperature synthetic aerospace lubricating oil, which was highly consistent with the practical operational conditions. The frictional performance of the three different impregnated graphite seal rings, including coefficient of friction, two-dimensional (2D)/three-dimensional (3D) morphologies of wear marks and wear rate of ring mass, were quantitatively analyzed and compared. The experimental results indicated that the metal antimony-impregnated graphite seal ring behaved with the smallest coefficient of friction among the three seal rings. 2D and 3D surface roughness parameters of the metal antimony impregnated graphite seal are the smallest. The wear rate of the seal ring’s mass is only approximately 22% of that of furan resin impregnated seal ring. The corresponding investigations demonstrated that the currently employed epoxy resin-impregnated graphite seal rings could be replaced by new candidates with better frictional performance to improve the service life.

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Section: Introductionmentioning

confidence: 99%

Evaluation on frictional performance of three different oil-lubricated impregnated graphite seal rings for aircraft integrated drive generators

Qi,

Wang,

Zhang

et al. 2023

Mater. Res. Express

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show abstract

“…3 The friction and wear properties are important indicators of their working performance and service life. 4 If the rings exhibit excessive wear or unexpected friction, they will contribute to excess energy expenditure, increase the likelihood of failure, truncate the lifetime of the sealing system, and drive up the costs of maintaining hydraulic devices. 5 The effective design and optimization of sealing rings depends on accurate evaluations of tribological processes and wear performance of sealing materials.…”

Section: Introductionmentioning

confidence: 99%

“…Previous researchers have estimated the friction and wear of PTFE composites with various filler materials. 4,5,[9][10][11] Riddar et al, 3 for example, built a special test setup and added 25% graphite to a guiding ring of PTFE to observe material transfer from the guiding ring to an aluminum surface. Liang et al 10 explored the tribological properties of a PTFE matrix with the addition of fluorinated graphene (FG) with various fluorine/ carbon (F/C) ratios and graphene (G); the wear resistance for four fabricated FG/PTFE composites was superior to that of the G/PTFE composite.…”

Section: Introductionmentioning

confidence: 99%

Tribological characteristics and wear mechanisms of reinforced composites against steel

Qian,

Pan,

2023

Journal of Thermoplastic Composite Materials

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To explore the potential wear performance of commonly utilized hydraulic system polymer components, we investigated the effects of different working conditions on the frictional and wear behaviors of three polymer sealing materials in this study. Polytetrafluoroethylene (PTFE), nylon (PA), and polypropylene (PP) composites were prepared using copper (Cu) and glass fiber (GF) as fillers. The tribological and wear properties (wear rate, surface appearance, wear patterns) of the sealing composites were evaluated. The results showed consistent trends toward increasing average coefficient of friction as load and speed increased for PTFE. The incorporation of filler improved the wear resistance of the composites. The addition of Cu particles showed lower coefficient under higher load and sliding speed. PA with continuous glass fiber (CGF) sealing composites showed lower coefficient, less wear volume, and relatively smoother wear zone surfaces than PTFE-based composites or PP with short glass fiber (SGF). We propose that PA-CGF outperforms other materials in regards to fatigue and friction and wear even under extremely high silding speed,as well as sealing properties.

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Effect of Humidity on the Wear Behavior of Graphene Under Current Carrying Conditions

Tang,

Huang,

Sun

et al. 2024

Tribol Lett

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Friction and wear performances of impregnated graphite in ring-on-ring tribological test

Cited by 17 publications

References 35 publications

Evaluation on frictional performance of three different oil-lubricated impregnated graphite seal rings for aircraft integrated drive generators

Evaluation on frictional performance of three different oil-lubricated impregnated graphite seal rings for aircraft integrated drive generators

Tribological characteristics and wear mechanisms of reinforced composites against steel

Effect of Humidity on the Wear Behavior of Graphene Under Current Carrying Conditions

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