Wear Behaviour of ZA27/SiC/Graphite Composites under Lubricated Sliding Conditions

Miloradović, Nenad; Vujanac, Rodoljub; Pavlović, Ana

doi:10.3390/ma13173752

Cited by 8 publications

(4 citation statements)

References 32 publications

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“…Babic et al [20] examined the impact of Al 2 O 3 particles on the ZA27 alloy under lubricating condition. Milarodovic et al [21] illustrated the properties of ZA27 alloy reinforced with graphite and SiC under lubricating conditions and concluded composite having graphite and SiC is depicted best wear resistance [21].…”

Section: Introductionmentioning

confidence: 99%

Correlating topographical characteristics of relaxed layer to tribology in Cu-Gr-TiC composite system

Ankit¹,

Gautam²,

Singh³

et al. 2023

Surf. Topogr.: Metrol. Prop.

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The copper graphite composites are often being applied as bearing materials in various industries. In present investigation, the correlation between the topographical characteristics of relaxed layer to tribology in Cu-Gr-TiC composite system has been investigated. For this purpose, the flake powder metallurgy approach was used to fabricate Cu-Gr-TiC composites and the tribology of these composites was studied under lubricating (synthetic SAE20W40 motor oil) condition. Variable loads of 10 N-70 N, sliding velocities were 0.75 m/s-3 m/s, and sliding distances of 2000 m-8000 m were the test parameters for sliding wear of composites under lubricating conditions. The worn surfaces were examined using SEM and EDS while topographical parameters were studied by AFM. The other properties like mechanical and physical properties were also studied for the sintered samples to better correlate the overall results of surface topography and tribology. The tests depict the successful fabrication of the composites. The composite having 4.5wt.% TiC particles exhibit maximum hardness and least wear and CoF under lubricating environment. The results of a sliding wear test conducted under lubrications revealed that rise in the concentration of nano TiC particles in the matrix improves the composite's tribological performance. The mechanism of wear for pure copper sample is abrasion whereas for TiC particle reinforced composite is smooth ploughing and delamination. The surface topographical parameters that are average surface roughness, area peak to valley height and skewness depicted less roughness values and better load bearing capacity for 4.5wt% TiC reinforced Cu-Gr sample.

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Section: Introductionmentioning

confidence: 99%

Correlating topographical characteristics of relaxed layer to tribology in Cu-Gr-TiC composite system

Ankit¹,

Gautam²,

Singh³

et al. 2023

Surf. Topogr.: Metrol. Prop.

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“…Ramachandra et al [28] investigated the wear resistance of eutectic Al-12%Si matrix composite reinforced with nano-size zirconium dioxide (n-ZrO 2 ) and reported a higher wear resistance as compared to the Al-12%Si alloy. Miloradovic et al [29] investigated the wear behaviour of ZA27/SiC/Gr hybrid composites tested under lubricated conditions. The tested samples showed much higher wear resistance than the corresponding matrix material.…”

Section: Introductionmentioning

confidence: 99%

Evaluating comparative wear behaviour of Al-15%Si based alloy/composites reinforced with zinc and zirconium oxide

Chavan¹,

Kurahatti²,

Haider

et al. 2023

Tribology - Materials, Surfaces & Interfaces

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The tribological characteristics of stir cast Al-15%Si-10%Zn matrix with 15%ZrO 2 reinforced composite were investigated. The microstructure of the Al-15Si alloy consisted of coarse primary Si and acicular eutectic Si phases randomly distributed in the Al dendrites. The Al-15%Si-10%Zn/ZrO2 composite showed spherical Si with a size between 25 and 75 µm; fragmented eutectic Si phase and uniform dispersion of ZrO 2 particles in the matrix. The wear test was conducted using in a pin-on-disc method at different loads and sliding velocities. It was found reduced coefficient of friction, significant increase in the hardness and wear resistance of the composite compared to the matrix alloy. High wear resistance in the composite due to the effect of solid lubrication provided by Zn, and good fracture toughness and wear resistance by the reinforced ZrO 2 particles. The predominant oxidative and abrasive wear were identified as the mechanisms leading to material failure through plastic deformation and delamination.

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“…Zinc -Aluminum alloys (ZA alloys), is an attractive material for tribological applications, which is attracted essential attention from both researchers and industries during the last few years. Due to its significant castability and exceptional properties, commercial ZA alloys, particularly known as ZA-27, have become an important replacement material, primarily for aluminum cast alloys and bearing bronzes 3,4 . In particular, ZA-27 alloys can also compete with cast iron, plastics, and steel when used for service under heavy mechanical loads and low sliding speeds at normal service temperatures 5 .…”

Section: Introductionmentioning

confidence: 99%

Study the Effect of New Rheocast on Tribological Behaviour of ZA27

Ghazi

Abass²,

Alali

et al. 2023

Mat. Res.

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This paper investigated how casting affects ASTM ZA-27 alloy's tribological performance in dry and lubricated conditions. To this end, varying contact loads and sliding speeds were applied to tribological tests. The ZA-27 alloy was produced using gravity die casting (GDC) and new rheocasting (NRC) methods. The results showed that the microstructure of GDC ZA-27 alloy is dendritic containing α and η phases. While the NRC alloy microstructure demonstrates a semi-globular structure of fine equiaxed α phase bordered by eutectoid α and η. The NRC alloy achieved an improvement in tensile, hardness, and elongation properties by almost 15%, 20%, and 25%, respectively. Regarding tribological properties, the NRC alloy achieved an enhancement in tribo-behavior by lowering the coefficient of friction (COF) to about 67% than the GDC alloy. Further, the results showed that the wear rate recorded an increment with applied load for both GDC and NRC alloys. Though, the results showed that the wear rate with NRC alloy was lower compared to the GDC alloy with about 84% at 160N normal load. The worn surfaces of NRC alloys were characterized by smooth and shallow wear grooves. While the GDC alloy worn surfaces were rougher and experience deeper grooves and damage.

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Wear Behaviour of ZA27/SiC/Graphite Composites under Lubricated Sliding Conditions

Cited by 8 publications

References 32 publications

Correlating topographical characteristics of relaxed layer to tribology in Cu-Gr-TiC composite system

Correlating topographical characteristics of relaxed layer to tribology in Cu-Gr-TiC composite system

Evaluating comparative wear behaviour of Al-15%Si based alloy/composites reinforced with zinc and zirconium oxide

Study the Effect of New Rheocast on Tribological Behaviour of ZA27

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