Characterization Studies of Slurry-Sprayed Mullite–Nickel Coatings on ASTM 1018 Steel

Verma, Ravi; Randhawa, Jagjit Singh; Kant, Suman; Suri, Narendra Mohan

doi:10.1007/s13369-019-03753-6

Cited by 11 publications

(3 citation statements)

References 33 publications

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“…For each sample, the gravimetric experiments were repeated thrice, and the average values were recorded to ensure reproducibility and performing precision analysis. The corrosion rates of samples are estimated using the mathematical expression given below [ 75 ],

…”

Section: Methodsmentioning

confidence: 99%

Corrosion Behaviour of High-Strength Al 7005 Alloy and Its Composites Reinforced with Industrial Waste-Based Fly Ash and Glass Fibre: Comparison of Stir Cast and Extrusion Conditions

et al. 2021

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The stringent demand to develop lightweight materials with enhanced properties suitable for various engineering applications is the focus of this research work. Industrial wastes such as fly ash (FA) and S-glass-fibres (GF) were used as reinforcement materials for high-strength alloy, i.e., Al 7005. Stir casting routes were employed for fabricating the four samples, Al 7005, Al 7005 + 5% GF, Al 7005 + 6% FA and Al 7005 + 5% GF + 6% FA. The extrusion process with different extrusion ratios (ER: 5.32:1, and 2.66:1) was used to examine the properties of all four samples. Extruded samples with ER: 5.32: 1 resulted in equiaxed grains with refined structure compared to stir casting parts. The effect of the extrusion process and the addition of reinforcements (GF and FA) on the gravimetric, electrochemical, and electrochemical impedance corrosion behaviour of Al 7005 composites in 1M HCl (Hydrochloric acid) solution were investigated. The results of all three corrosion methods showed that Al 7005 + 6% FA exhibited higher corrosion resistance. Corrosion rate of Al 7005, Al 7005 + 5% GF, Al 7005 + 6% FA and Al 7005 + 5% GF + 6% FA is found equal to 3.25, 2.41, 0.34, and 0.76 mpy, respectively. The FA particles remain inert and act as a physical barrier with corrosive media during the corrosion test. GF undergoes fibre degradation or disrupts the continuity of the glass network as a result of fibre leaching, which increases the corrosion rate in the sample. The gravimetric study showed that the corrosion rates decreased with an increase in extrusion ratio, which might be due to corrosion passivation increases and improved properties. The scanning electron microscopy reveals that corrosion fits, flakes and micro-cracks were observed more in the as-cast composites than that of extrusion composites, promoting the corrosion rate.

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…”

Section: Methodsmentioning

confidence: 99%

Corrosion Behaviour of High-Strength Al 7005 Alloy and Its Composites Reinforced with Industrial Waste-Based Fly Ash and Glass Fibre: Comparison of Stir Cast and Extrusion Conditions

et al. 2021

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“…The normal load applied by a scratch testing device created a specific type of failure in terms of cracks or delamination, which were recorded as critical loads. Later on, this failure was co-related to critical failure load by Benjamin and Weaver with the failure of the coated sample [16,38,39]. After basic logical evaluation for adhesion of the coating, an automatic scratch tester machine was developed by a group of scientists in the 1980s [40].…”

Section: Scratch Testingmentioning

confidence: 99%

Influence of laser texturing pre-treatment on HVOF-sprayed WC-10Co-4Cr+GNP coatings on AISI 304

Kumar

Verma

Chauhan

et al. 2022

Surf. Topogr.: Metrol. Prop.

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High-Velocity Oxygen Fuel (HVOF) is one of the most important thermal spraying techniques for protective coating on pristine alloy surfaces by cermet feedstock powders. In the article, grit blasting before HVOF coating is replaced by laser texturing to create specific roughness and deterministic cavities pattern for better mechanical interlocking of deposited WC-10Co-4Cr + 3% Graphene Nanoplatelets (GNPs) on AISI 304 Steel Substrate. Two geometries; first one is Circular texturing (CT) of diameter (d) 100 μm and pitch (p) 120 μm, second is triangular texturing (TT) of side (s) 100 μm and side to side (ss) distance 120 μm have been used. Various testing measures; like surface roughness, XRD analysis, FESEM image analysis, EDS analysis, lattice strain and residual stress, scratch test, Vickers hardness test on coating and base substrate cross-section, and pin-on-disc test for sliding wear behaviour have been performed. After these coating characterizations, it was found that the lattice strain and residual stress decreases significantly, the micro-hardness of the cross-section improved, the adhesion strength of the coating was enhanced and a low sliding wear rate on the coated surface was observed. Uniform distribution of feedstock powder on the surface but higher porosity on the TT surface showed by FESEM image analysis and a large number of cracks observed during scratch tests at higher load.

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“…Besides, the elimination of traditional fabrication route employing casting and roll bonding later, TS is advantageous of tailoring the surface topography as per the functional requirements to suit tribological conditions, which is not easily possible by melting metallurgy. Moreover, the lamellar morphology produced upon impingement of the partially melted feedstock powder particles results in inherently porous microstructure [110] (refer figure 6). This porous structure which serves as lubricant micro reservoirs has been proved beneficial for tribological behavior [111].…”

Section: Coatings In Fluid-film Bearingmentioning

confidence: 99%

Qualitative potentials of surface textures and coatings in the performance of fluid-film bearings: a critical review

Sharma

Verma

Sharma

et al. 2021

Surf. Topogr.: Metrol. Prop.

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The purpose of this article is to present the physical insights behind the successful implementation of surface textures and coatings in fluid film bearing systems for improving the tribological performance. The article is a systematic review of previously published articles implementing textures and coatings to know tribology behind it. The fluid rheology is also equally important for improving the performance of the bearing systems. The main focus is to know the reasons that have been quoted in numerous research studies for fruitfulness of texturing and coatings. It has come into the notice that a number of experimental studies incorporating textures were reported by the researchers; however, a huge amount of numerical/theoretical studies have been presented. The evolution in lubricants research appreciably used for improving the tribological performance by the reduction of friction and wear. The combination of textures and lubricants has proven the unambiguous enhancement in the rate of performance. The collection of information regarding physical causes behind the benefits of surface texture and coatings is the real worth of this article. The work on coatings of bearings have also becoming the interest of researchers and have profound effects in enhancing the tribological performance of slider bearings.

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Characterization Studies of Slurry-Sprayed Mullite–Nickel Coatings on ASTM 1018 Steel

Cited by 11 publications

References 33 publications

Corrosion Behaviour of High-Strength Al 7005 Alloy and Its Composites Reinforced with Industrial Waste-Based Fly Ash and Glass Fibre: Comparison of Stir Cast and Extrusion Conditions

Corrosion Behaviour of High-Strength Al 7005 Alloy and Its Composites Reinforced with Industrial Waste-Based Fly Ash and Glass Fibre: Comparison of Stir Cast and Extrusion Conditions

Influence of laser texturing pre-treatment on HVOF-sprayed WC-10Co-4Cr+GNP coatings on AISI 304

Qualitative potentials of surface textures and coatings in the performance of fluid-film bearings: a critical review

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