Tribological properties of twin wire arc spray coated aluminum cylinder liner

Kim, Jae Kang; Xavier, Fábio Antônio; Kim, Dae Eun

doi:10.1016/j.matdes.2015.06.122

Cited by 25 publications

(7 citation statements)

References 35 publications

(48 reference statements)

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“…The wear volume loss of both coatings and counterparts was measured using confocal scanning laser microscope (CSLM, Olympus 4100, Olympus, Tokyo, Japan). The wear rate is calculated as: K = V/SF [20], where K is the wear rate with the unit of mm 3 /(N·m), V is the wear volume loss in mm 3 , S is the total sliding distance in m, and F is the normal load in N. Figure 1 shows the SEM micrographs of the Fe 59 Cr 12 Nb 5 B 20 Si 4 feedstock powder. Apparently, the majority of Fe-based particles exhibit spherical or near-spherical shapes, providing good flow ability during the spraying process.…”

Section: A Fementioning

confidence: 99%

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Thermal Conductivity and Wear Behavior of HVOF-Sprayed Fe-Based Amorphous Coatings

et al. 2017

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Abstract:To protect aluminum parts in vehicle engines, metal-based thermal barrier coatings in the form of Fe 59 Cr 12 Nb 5 B 20 Si 4 amorphous coatings were prepared by high velocity oxygen fuel (HVOF) spraying under two different conditions. The microstructure, thermal transport behavior, and wear behavior of the coatings were characterized simultaneously. As a result, this alloy shows high process robustness during spraying. Both Fe-based coatings present dense, layered structure with porosities below 0.9%. Due to higher amorphous phase content, the coating H-1 exhibits a relatively low thermal conductivity, reaching 2.66 W/(m·K), two times lower than the reference stainless steel coating (5.85 W/(m·K)), indicating a good thermal barrier property. Meanwhile, the thermal diffusivity of amorphous coatings display a limited increase with temperature up to 500 • C, which guarantees a steady and wide usage on aluminum alloy. Furthermore, the amorphous coating shows better wear resistance compared to high carbon martensitic GCr15 steel at different temperatures. The increased temperature accelerating the tribological reaction, leads to the friction coefficient and wear rate of coating increasing at 200 • C and decreasing at 400 • C.

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Section: A Fementioning

confidence: 99%

“…Coating resistance to wear is critical for vehicle engine applications where severe wear is present, such as piston rings and cylinder liners [3,17]. A good characterization and understanding of wear mechanisms with increased temperature are substantially meaningful to design the practical application of amorphous coatings.…”

Section: Introductionmentioning

confidence: 99%

Thermal Conductivity and Wear Behavior of HVOF-Sprayed Fe-Based Amorphous Coatings

et al. 2017

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“…Graphite porosities, which are intrinsic to the material itself (cylinder liner is generally made of cast iron), present a uniform distribution of cavities. 14 Both features act as oil reservoirs and pathways, ensuring hydrodynamic lubrication. In some cases, an otherwise stable and minimal wear situation of piston ring and cylinder liner may aggravate within a short period of time due to severe accelerated wear and elevated component temperature.…”

Section: Introductionmentioning

confidence: 99%

Wear performance of cylinder liner surface texturing on cylinder liner–piston ring assembly

Peng¹,

Huang

2017

Proceedings of the Institution of Mechanical Engineers, Part J:

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The microgeometrical structure has a great impact on lubricating performance of the cylinder liner–piston ring assembly. Extensive investigations have been done upon the various texture types for better lubrication. However, rarely do they focus on the morphological alteration of the friction surfaces during the initial wearing process. In this study, the pits and grooves at the liner inner surface are processed and experiments are conducted to investigate the influence of the surface texturing structure on the piston ring assembly during the initial wearing process at different rotating speeds. Then, the tribology information of cylinder liner–piston ring assembly is obtained and the mechanism between surface texturing structure and lubricating performance was analyzed. Experimental results show that some pits and grooves on the inner surface of the cylinder liner can properly improve the wear performance of cylinder liner–piston ring at a high rotating speed in diesel engine, and hence reducing friction and wear. Moreover, it provides experimental data for theoretical analysis and knowledge for improving the friction surface texturing of cylinder liner.

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“…In this regard, serious attempts have been made to develop various approaches to lower friction and wear, particularly in engines and transmissions, as a large portion of fuel energy (approximately 17 per cent) is wasted in these components (Holmberg et al, 2012). Along with methods that have been widely applied to surface modification and engineering, such as the utilization of wearprotective coatings and surface patterning (Khadem et al, 2014;Penkov et al, 2015;Hong et al, 2015;Kurniawan and Ko, 2015;Kim et al, 2015), the modification of lubricants by means of improving their chemical formulation or introducing nano-additives seems quite promising for the reduction friction and wear, and thus, the improvement of fuel economy (Wong and Tung, 2016;Ahmer et al, 2016;Dai et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

Characterization of the friction and wear effects of graphene nanoparticles in oil on the ring/cylinder liner of internal combustion engine

Demi̇rtaş

Kaleli̇

Khadem

et al. 2019

ILT

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Purpose This study aims to investigate the tribological characteristics of a Napier-type second piston ring against a cylinder liner in the presence of graphene nano-additives mixed into 5W40 fully synthetic engine oil. Design/methodology/approach Wear tests were carried out in the boundary lubrication condition using a reciprocating tribometer, and real engine tests were performed using a single spark ignition Honda GX 270 test engine for a duration of 75 h. Findings The experimental results of the tribometer tests revealed that the nano-additives formed a layer on the rubbed surfaces of both the piston ring and the cylinder liner. However, this layer was only formed at the top dead center of the cylinder liner during the engine tests. The accumulation of carbon (C) from the graphene was heavily detected on the rubbed surface of piston ring/cylinder liner, mixed with other additive elements such as Ca, Zn, S and P. Overall, the use of graphene nano-additives in engine oil was found to improve the frictional behavior in the boundary and mixed lubrication regimes. Abrasive wear was found to be the main mechanism occurring on the surface of both piston rings and cylinder liners. Originality/value Though many researchers have discussed the potential benefits of graphene as a nano-additive in oil to reduce the friction and wear in laboratory tests using tribometers, to date, no actual engine tests have been performed. In this paper, both tribometer and real engine tests were performed on a piston ring and cylinder liner using a fully formulated oil with and without graphene nano-additives in the boundary lubrication condition. It was found that a graphene nano-additive plays an active role in lowering the coefficient of friction and increasing surface protection and lubrication by forming a protective layer on the rubbing surfaces.

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Tribological properties of twin wire arc spray coated aluminum cylinder liner

Cited by 25 publications

References 35 publications

Thermal Conductivity and Wear Behavior of HVOF-Sprayed Fe-Based Amorphous Coatings

Thermal Conductivity and Wear Behavior of HVOF-Sprayed Fe-Based Amorphous Coatings

Wear performance of cylinder liner surface texturing on cylinder liner–piston ring assembly

Characterization of the friction and wear effects of graphene nanoparticles in oil on the ring/cylinder liner of internal combustion engine

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