Tribological Characteristics of Carbon Nanotubes‐Reinforced Plasma‐Sprayed Al2O3‐TiO2 Ceramic Coatings

Kalangi, Chaitanya; Bolleddu, Venkateshwarlu; Allasi, Haiter Lenin

doi:10.1155/2021/8094640

Cited by 11 publications

(3 citation statements)

References 31 publications

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“…It is not necessary to stress the significance of clean air in maintaining a decent and healthy lifestyle. As a result, emissions must be significantly reduced in order to preserve a relatively secure planet for future generations [1][2][3][4][5][6][7].…”

Section: Introductionmentioning

confidence: 99%

[Retracted] Copper Oxide Nanoparticles Incorporated in the Metal Mesh Used to Enhance the Heat Transfer Performance of the Catalytic Converter and to Reduce Emission

Prabhahar

Prakash

Kumar

et al. 2022

Journal of Nanomaterials

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Heating the catalysts chemically at a cold start is indeed an approach to achieving catalytic performance. The purpose of this effort is to reduce cold flow emissions to background levels during regular engine operation. To address this issue, a thermal model was created, and a temperature study of various configurations was performed utilizing the computational dynamics method. This was followed by a regression model to confirm the results of the experiment. The article discusses how using a computational fluid dynamic to simulate the transient temperature profile of a chemically heated catalytic converter (CHCC) in exhaust may aid in the development of a much more powerful and energy-efficient catalytic converter. In this research, nanoparticles have been used as a heat transfer enhancement agent to improve the thermal conductivity of the exhaust gases. This work has been proposed to calculate the flow behaviour and heat transfer of nanoparticles in the proposed catalytic converter. The nanomaterial composite, created by incorporating copper oxide nanoparticles (CuO2) on the surfaces of metal mesh, is used in the catalytic converter. The analytical technique has previously demonstrated its use in better predicting and comprehending the dynamic behaviour of a tightly linked catalyst and its thermally light-off period. The converter was evaluated in this study together with the SI (spark ignition) engine, and the data collected has been verified using analysis of regression. It is seen that in the converter with nanocopper oxide configuration, 50% carbon monoxide (CO) conversion efficiency is possible when the temperature of the main converter reaches 250°C and the CO is initially 2.7% Vol, and after reaching light off, it is 1.95% Vol. The time it takes to reach 250°C is 48 seconds after a cold start. In the case of hydrocarbons (HC), 50% HC conversion is reached during the test period of 168 seconds after the cold start. The HC is 605 ppm initially, and after light off, it is 130 ppm. The time taken to reach the HC light-off temperature is 300°C, with nanocopper oxide reaching this temperature in 168 seconds.

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Section: Introductionmentioning

confidence: 99%

[Retracted] Copper Oxide Nanoparticles Incorporated in the Metal Mesh Used to Enhance the Heat Transfer Performance of the Catalytic Converter and to Reduce Emission

Prabhahar

Prakash

Kumar

et al. 2022

Journal of Nanomaterials

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“…For its greater surface potential, the sharp-edged plate-shaped silicon phase in the aluminum alloy was thermodynamically unstable. In comparison to a central section of the silicon plates, maximum stress is likely higher at these sharp corners [24].…”

Section: Relation Exists Between Mechanical Property Andmentioning

confidence: 98%

Mechanical Test on Aluminum Alloy with Maximal Soluble SiC Reinforcement

Pruthviraju¹,

Dambhare²,

Pathri

et al. 2022

Advances in Materials Science and Engineering

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This work deals with the characteristics of LM-13alloy under cyclic stress with and without 63% by weight of SiC-reinforced composite particle reinforcements both cast and tempered at ambient condition. The hardness of the composite sample before and after tempering was 112 HV and 134HV. The tempered sample shows 16.4% increment. UTS of base alloy and the composite was determined to be 165 MPa and 149 and 210, and 145 and 192, respectively. The UTS decreases by 12% in cast state and 8% in tempered condition. The tempered base alloy shows an increment of 21%, and the 0.25% proof stress increased by 28%. After heat treatment, the elongation at the break of the base alloy improved to 3.5%. The tempered specimen shows an increased fatigue performance of approximately 43%. The fatigue life was determined to be about 165 repetitions at the 75 MPa level of stress with 75% of UTS utilization. Decohesion of a silicon particulate interaction and in certain circumstances, the subsequent breakdown of SiC particles has led to fractures in composites. The preheated eutectic silicon that had an almost gain round shape will withstand crack growth development, as the aluminum matrix had a higher cohesive force compared to reinforced SiC particles which provide less strain increase locations. Stronger bonds among silica eutectic and aluminum matrices produced the fracture across their contact, silicon breaks owing to the application of the fatigue load and lead to specimen failure.

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“…The study also found that the friction and wear properties of chemically bonded ceramic coatings under different curing agents are related to the ratio of AlPO 4 :Al 2 O 3 . Chaitanya et al [18] prepared and characterized the wear-resistant and low porous coatings of Al 2 O 3 + 3 wt-% TiO 2 and respective carbon nanotube (CNT) doped coatings. They found that the formation of cracks as well as micropores is decreased by the addition of carbon nanotubes.…”

Section: Introductionmentioning

confidence: 99%

Influence of pore-forming agent on wear resistance of composite coating

Liu

Bian

Wang

et al. 2022

Surface Engineering

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In this paper, polystyrene microsphere (PS) is selected as the pore-forming agent to prepare porous phosphate bonded ceramic coating. Then the mixed solution of polytetrafluoroethylene and polyamide-imide (PTFE-PAI) is pressed into the porous coating to prepare the composite coating. Besides, the microstructure and tribological properties of composite coatings were studied. The results show that the hydrophobicity of composite coating is improved because PTFE-PAI is pressed into the coating. Moreover, the coefficient of friction decreases with the increase of PS content due to the self-lubricating ability of polytetrafluoroethylene. Besides, the wear rate also decreases with the increase of PS content, because polytetrafluoroethylene forms a transfer film on the grinding ball, and the original ceramic coating framework can withstand shearing force due to its high hardness, which protects the composite coating and reduces the wear rate. With this self-lubricating capability, the composite coating with 6 wt-% PS showed the smallest wear rate.

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Tribological Characteristics of Carbon Nanotubes‐Reinforced Plasma‐Sprayed Al₂O₃‐TiO₂ Ceramic Coatings

Cited by 11 publications

References 31 publications

[Retracted] Copper Oxide Nanoparticles Incorporated in the Metal Mesh Used to Enhance the Heat Transfer Performance of the Catalytic Converter and to Reduce Emission

[Retracted] Copper Oxide Nanoparticles Incorporated in the Metal Mesh Used to Enhance the Heat Transfer Performance of the Catalytic Converter and to Reduce Emission

Mechanical Test on Aluminum Alloy with Maximal Soluble SiC Reinforcement

Influence of pore-forming agent on wear resistance of composite coating

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