Tribological Behavior of Plasma-Sprayed Al2O3-20 wt.%TiO2 Coating

Cui, Shiyu; Miao, Qiang; Liang, Wenping; Zhang, Zhigang; Xu, Yang; Ren, Biao

doi:10.1007/s11665-017-2653-3

Cited by 11 publications

(12 citation statements)

References 24 publications

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“…TiO 2 melts at a lower temperature (1854 • C) than Al 2 O 3 (2040 • C) [28], and the presence of γ-Al 2 O 3 in the coating was suggested by Mishra et al [9]. However, the subsequent decomposition of Al 2 TiO 5 into rutile (TiO 2 ) and Al 2 O 3 is possible at high temperatures of >1280 • C [3] and takes place e.g., in the diesel engine, as discussed in [16].…”

Section: Microstructure and Propertiesmentioning

confidence: 97%

“…The porosity of LVOF-sprayed coatings is usually higher than that of PS or HVOF coatings [4,8]. However, relatively high porosity improves fracture toughness and allows the coating to alleviate internal stresses [3], which can have a beneficial effect on cavitation erosion resistance. The as-sprayed coating surface roughness is attributed to the presence of lamellar structure, the unmelted particles, and the overlapping of splats and it derives from spraying parameters and ceramic-to-metallic-powder ratios.…”

Section: Microstructure and Propertiesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…Aluminia-titania sprayed coatings, Al 2 O 3 -TiO 2 , are used in the chemical engineering, metal, and paper industries to improve resistance to wear, corrosion, and high-temperature oxidation [1][2][3][4][5][6]. The protective Al 2 O 3 -TiO 2 ceramic coatings are typically deposited with 3% [5,7,8], 13% [1,3,[8][9][10], 20% [3], 40% [2,3], or 50% [11] addition of TiO 2 . Apart from the fact that plasma spraying (PS) is the most widely used technique of Al 2 O 3 -TiO 2 ceramic deposition [3,7,8,11,12], processes like flame spraying (low-velocity oxy-fuel LVOF) [2,5,6], high-velocity oxy-fuel (HVOF) [12], or even laser cladding [1] are also employed.…”

Section: Introductionmentioning

confidence: 99%

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Cavitation Erosion Resistance and Wear Mechanism Model of Flame-Sprayed Al2O3-40%TiO2/NiMoAl Cermet Coatings

Szala

Hejwowski

2018

Coatings

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This manuscript deals with the cavitation erosion resistance of flame-sprayed Al2O3-40%TiO2/NiMoAl cermet coatings (low-velocity oxy-fuel (LVOF)), a new functional application of cermet coatings. The aim of the study was to investigate the cavitation erosion mechanism and determine the effect of feedstock powder ratio (Al2O3-TiO2/NiMoAl) of LVOF-sprayed cermet coatings on their cavitation erosion resistance. As-sprayed coatings were investigated for roughness, porosity, hardness, and Young’s modulus. Microstructural characteristics of the cross section and the surface of as-sprayed coatings were examined by light optical microscopy (LOM), scanning electron microscopy (SEM) with energy-dispersive X-ray spectroscopy (EDS) and X-ray diffraction (XRD) methods. Coating cavitation tests were conducted in accordance with the ASTM G32 standard using an alternative stationary specimen testing method with usage of reference samples made from steel, copper, and aluminum alloys. Cavitation erosion resistance was measured by weight and volume loss, and normalised cavitation erosion resistance was calculated. Surface eroded due to cavitation was examined in successive time intervals by LOM and SEM-EDS. On the basis of coating properties and cavitation investigations, a phenomenological model of the cavitation erosion of Al2O3-40%TiO2/NiMoAl cermet coatings was elaborated. General relationships between their properties, microstructure, and cavitation wear resistance were established. The Al2O3-40%TiO2/NiMoAl composite coating containing 80% ceramic powder has a higher cavitation erosion resistance than the reference aluminium alloy.

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Section: Microstructure and Propertiesmentioning

confidence: 97%

Section: Microstructure and Propertiesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Cavitation Erosion Resistance and Wear Mechanism Model of Flame-Sprayed Al2O3-40%TiO2/NiMoAl Cermet Coatings

Szala

Hejwowski

2018

Coatings

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“…Plasma spraying coating has also been used for wear protection [5][6][7]. Wear associated challenges have been minimized by either using sturdy and abrasion resistant alloys or by surface modification via choosing a suitable coating material which is hard enough to resist any further frictional damages and is also relatively cheaper than the high cost wear resistant alloys.…”

Section: Applications Of Plasma Spray Coatingsmentioning

confidence: 99%

Porosity and Its Significance in Plasma Sprayed Coating: A Review

Odhiambo¹,

Li²,

Zhao³

et al. 2019

Preprint

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Porosity in plasma sprayed coatings is vital for most engineering applications. It is either advantageous or disadvantageous depending on the functionality of the coating and the immediate working environment. Consequently, the formation mechanisms and development of porosity has been extensively explored to find out modes of controlling porosity in plasma sprayed coatings. In this work, a comprehensive review of porosity on plasma sprayed coatings is established. The formation and development of porosity on plasma sprayed coatings are governed by set spraying parameters. Optimized set spraying parameters have been used to achieve the most favorable coatings with minimum defects. Even with the optimized set spraying parameters, defects like porosity still occur. Here, we discuss other ways that can be used to control porosity in plasma sprayed coating with emphasis to atmospheric plasma sprayed chromium oxide coatings. Techniques like multi-layer coatings, nano-structured coatings, doping with rare earth elements, laser surface re-melting and a combination of the above methods have been suggested in adjusting porosity. The influences of porosity on properties of plasma sprayed coatings and the measurement methods of porosity have also been reviewed.

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A review on the development of thermal barrier coatings by using thermal spray techniques

Yedida

Vasudev

2022

Materials Today: Proceedings

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Tribological Behavior of Plasma-Sprayed Al2O3-20 wt.%TiO2 Coating

Cited by 11 publications

References 24 publications

Cavitation Erosion Resistance and Wear Mechanism Model of Flame-Sprayed Al2O3-40%TiO2/NiMoAl Cermet Coatings

Cavitation Erosion Resistance and Wear Mechanism Model of Flame-Sprayed Al2O3-40%TiO2/NiMoAl Cermet Coatings

Porosity and Its Significance in Plasma Sprayed Coating: A Review

A review on the development of thermal barrier coatings by using thermal spray techniques

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