Influence of process parameters on the formation of phases and mechanical properties of plasma sprayed Al2O3–Cr2O3 coatings

Dhakar, Balmukund; Chatterjee, Satyajit; Sabiruddin, Kazi

doi:10.1080/14328917.2016.1265246

Cited by 11 publications

(4 citation statements)

References 33 publications

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“…The brittle phase W 2 C developed during the deposition contributed to a reduction in the hardness of coatings. The formed Cr 2 O 3 is the hardest metal oxide [22,23] and was beneficial in the enhancement of the coating hardness. The carbon from the decarburization process reacted with Ni and atmospheric oxygen to form Ni 3 C and carbon oxides, respectively.…”

Section: Resultsmentioning

confidence: 99%

Tribo-behaviour of APS and HVOF sprayed WC–Cr₃C₂–Ni coatings for gears

Bhosale¹,

Rathod²

2020

Surface Engineering

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The tungsten-carbide coatings could be employed to minimise failures of gears due to excessive wear in hostile operating atmospheres. In this work, WC-Cr 3 C 2 -Ni powder was deposited on the SS 316L substrate using APS and HVOF processes. The deposited coatings were characterised and investigated for the effects of dissimilar counter bodies. The unidirectional sliding experiments were conducted on the ball-on-disc tribometer (ASTM G99-95a). The variable contact pressure was applied to simulate the tangible effect of contact stress variation during the dry sliding in the gears. The wear mechanisms depicted that the wear is in the mild regime and better durability of both coatings. The results of tribo-testing and analysis of results by ANOVA confirmed that contact pressure and hardness of counter body are significant factors influencing friction and wear. Furthermore, the relation between contact surface temperature and adhesion of debris to the surface has been studied.

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Section: Resultsmentioning

confidence: 99%

Tribo-behaviour of APS and HVOF sprayed WC–Cr₃C₂–Ni coatings for gears

Bhosale¹,

Rathod²

2020

Surface Engineering

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“…Phase analyses of the powders, as-sprayed and heat treated coatings are studied by using X-ray diffractometer (Cu Kα, Rigaku SmartLab 3 kW). Rietveld refinement method is performed on XRD data (with PANalytical X'pert High Score Plus package) to quantify the different phases present in the coating [6,12,14]. Microhardness of the coatings is measured by using Vickers microhardness tester (UHL-002) by applying 200 gf load on the polished ( R a = 1 ± 0.12 μm) cross-section of the coating.…”

Section: Methodsmentioning

confidence: 99%

“…The quantification of different phases present in the plasma sprayed alumina, alumina-chromia and alumina-zirconia coatings is possible with Rietveld refinement technique [6,[11][12][13][14]. Sabiruddin et al [12] quantified α-alumina phase content in plasma sprayed alumina coating and correlated that to the process parameters.…”

Section: Introductionmentioning

confidence: 99%

Heat treatment of plasma sprayed alumina-chromia composite coatings

Dhakar

Namdeo

Chatterjee

et al. 2018

Surface Engineering

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Atmospheric plasma spray technique is used to develop alumina-based coatings by spraying mechanically blended alumina-chromia feedstock with chromia content varying from 1-6 wt-%. The influence of annealing temperature (900-1200°C) on the phases formed in the coatings is also studied. Phases present in the coatings are analysed and quantified using Xray diffraction and Rietveld refinement, respectively. Microstructures of the coating cross sections are studied under scanning electron microscope. Wear rate of the annealed coatings are evaluated by linear reciprocating wear tests. The adhesion strength of the coatings is also estimated by ASTM C1624 standard. The results indicate that the increase in annealing temperature causes rise in transformation of metastable phases of alumina into stable αalumina. The minimum annealing temperature required to complete this transformation is estimated for each coating. The lowest specific wear rate is observed at 1150°C temperature and with 4 wt-% chromia content. The significant change in the trend of wear rate observed at the annealing temperature of 1200°C can be attributed to formation of large amount of cracks in the coatings. Adhesion strength of the coating improves with increasing chromia content. However, with increase in annealing temperature the coating adhesion decreases significantly due to the formation of cracks.

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“…The investigations revealed that the properties of the coatings primarily depend on the cohesion/bonding of particles which varies steeply with the temperature of sprayed particles [17]. Although copious research work [18][19][20][21] associated with the wear resistant coatings developed by plasma spray and HVOF techniques could be witnessed, much less work towards improving the wear resistance of distinct components of the textile industry has been traced. In Cr 3 C 2 NiCr coating, the NiCr phase is responsible for the required corrosion resistance whereas the carbide ceramic phase provides the necessary abrasive wear resistance [22,23].…”

Section: Surface Wavinessmentioning

confidence: 99%

Surface Modification of Ring-Traveler of Textile Spinning Machine for Substantiality

Bains¹,

Grewal²,

Sidhu³

et al. 2020

FU Mech Eng

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In this report, a study of the wear mechanisms involved in spinning Ring and Traveler of textile industry have been presented. These components, after surface processing with various coatings techniques, were analyzed on the test rig to analyze the wear mechanism. The objective was accomplished by comparing various plasma sprayed coatings on E52100 steel pins using a Pin-on-Disc machine. The surface morphology as well as mechanical properties of the deposited coatings namely WC-Co-Cr, Al2O3+TiO2 (Alumina-Titania) and Cr3C2NiCr, as well as uncoated E52100, were comparatively studied. This study elucidates towards improving the working life of the Ring in a Textile mill while spinning operation. An X-ray diffractometer (XRD) and Scanning Electron Microscope (SEM) was employed to characterize the unworn and worn surfaces of the specimens. The study revealed that the wear rate of Plasma sprayed thermal coatings enhanced with augmenting load. The Plasma sprayed WC-Co-Cr, Cr3C2NiCr, Al2O3+13TiO2 coatings developed on workpiece pins exhibited a notable decrease in volume loss of the material as compared to uncoated E52100 substrate. WC-Co-Cr coating turned out to be the best performer in terms of lowest cumulative volume loss among all the variants of coatings.

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Influence of process parameters on the formation of phases and mechanical properties of plasma sprayed Al₂O₃–Cr₂O₃ coatings

Cited by 11 publications

References 33 publications

Tribo-behaviour of APS and HVOF sprayed WC–Cr₃C₂–Ni coatings for gears

Tribo-behaviour of APS and HVOF sprayed WC–Cr₃C₂–Ni coatings for gears

Heat treatment of plasma sprayed alumina-chromia composite coatings

Surface Modification of Ring-Traveler of Textile Spinning Machine for Substantiality

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Influence of process parameters on the formation of phases and mechanical properties of plasma sprayed Al2O3–Cr2O3 coatings

Cited by 11 publications

References 33 publications

Tribo-behaviour of APS and HVOF sprayed WC–Cr3C2–Ni coatings for gears

Tribo-behaviour of APS and HVOF sprayed WC–Cr3C2–Ni coatings for gears

Heat treatment of plasma sprayed alumina-chromia composite coatings

Surface Modification of Ring-Traveler of Textile Spinning Machine for Substantiality

Contact Info

Product

Resources

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Influence of process parameters on the formation of phases and mechanical properties of plasma sprayed Al₂O₃–Cr₂O₃ coatings

Tribo-behaviour of APS and HVOF sprayed WC–Cr₃C₂–Ni coatings for gears

Tribo-behaviour of APS and HVOF sprayed WC–Cr₃C₂–Ni coatings for gears