Effect of TiO2 content on properties of Al2O3 thermal barrier coatings by plasma spraying

Jia, Sheng-kai; Zou, Yong; Xu, Jiyuan; Wang, Jing; Yu, Lei

doi:10.1016/s1003-6326(15)63593-2

Cited by 69 publications

(47 citation statements)

References 24 publications

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“…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%

“…In industrial applications, different metallic bond coats such as NiAl, NiCr, NiCrAl, NiMoAl, or NiCrMo are employed to increase ceramic coating adhesion to the substrate [4,8,14,16]. Coatings deposited with NiMoAl feedstock powders are described in the literature as promoting high bonding strength, good antioxidation ability, and excellent corrosion and wear resistance, and are widely used as a protective coating for many industrial components under high-temperature conditions [17].…”

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: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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 change of the grate material would greatly decrease the cost of manufacturing, not to mention the increased longevity of the grate. The temperature inside the boiler is about 500-600 °C and as other scientist have confirmed, there are almost no phase changes of Al 2 O 3 coatings in the range of 500-700 °C [7,14]. To decrease the manufacturing cost even further, unlike in the work of other authors [4][5][6][7][8][9][10], where coatings were formed mostly using Ar as primary and H 2 as secondary gas, in this research air was used as primary and H 2 as secondary gas.…”

Section: Introductionmentioning

confidence: 76%

“…Such wide applications are related to the high hardness, chemical inertness and low cost of material. To improve coating qualities, such as brittleness and friction coefficient reduction, increase of fracture toughness and corrosion resistance, addition of titanium oxide to alumina powder is widely used [4][5][6][7][8]. It was found that addition of TiO 2 reduces the microhardness of alumina coatings [9][10][11][12], also titanium oxide increases corrosion resistance, wear rate, elastic modulus and decreases porosity [13].…”

Section: Introductionmentioning

confidence: 99%

Thermal And Chemical Resistance Of Plasma Sprayed Al2o3, Al2o3-Tio2 Coatings

Šuopys

Marcinauskas

Kėželis

et al. 2020

Preprint

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In this article, the results of thermal and chemical resistance, of plasma sprayed Al2O3 and Al2O3-13wt.TiO2 coatings on a steel (P265GH) sample are presented. Coatings were formed using air-hydrogen plasma direct current plasma torch at atmospheric pressure. The resistance of coatings was measured by analyzing surface structure, elemental and phase composition of as sprayed coatings and after several heating cycles, imitating application conditions. To make this technology more appealing, by decreasing exploitation cost of standard cast iron grate used in straw pellet broilers, we used cheaper stainless steel with a protective Al2O3 and Al2O3-13wt.% TiO2 coatings. Most of the research done in this field is by using Ar as primary gas, but to decrease the manufacturing cost even further we used Air as primary gas. It was determined that after heat treatment the minor changes in the elemental composition were observed. Meanwhile an additional crystalline phases of metal oxides were detected.

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“…Thirunavukkarasu et al (2018) investigated the performance characteristics of thermal barrier coated piston crown in the variable compression ratio diesel engine with using single, four and five holes fuel injector nozzle. Jia et al (2015) investigated about the effect of TiO2 content on Al2O3 thermal barrier coatings on 6061 aluminum combination by plasma splashing. The erosion protection, thermal protection property and stage structure of these coatings were explored.…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigation of Thermal Barrier (8YSZ-MGO-TIO2) Coated Piston used in Diesel Engine

Vadivel¹,

Sivanandi²

2020

JAFM

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A single cylinder diesel engine was tested under different loading conditions with its piston crown coated with the Thermal Barrier Coating (TBC). The main objective of this work is to investigate the effect of the TBC on performance and emission characteristics in the diesel engine. The top surface of the piston was coated with 100 µm thick NiCrAl as lining layer by plasma spray method. A mixture of 88% Yttria stabilized Zirconia, 4% MgO and 8% TiO2 of 150 µm thick were coated over the lining layer. Exhaust emission (HC, NOx, CO and CO2) parameters were investigated using AVL exhaust gas analyzer. The results showed that the brake thermal efficiency was increased by 10% and brake specific fuel consumption was decreased by 9.8% for coated piston in comparison with the uncoated piston engine. It was also observed that, smoke, CO and HC emissions were decreased in the TBC engine as compared with the baseline engine. In addition carbon di oxide (CO2) and nitrogen oxide (NOx) emissions were partially increased.

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Effect of TiO2 content on properties of Al2O3 thermal barrier coatings by plasma spraying

Cited by 69 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

Thermal And Chemical Resistance Of Plasma Sprayed Al2o3, Al2o3-Tio2 Coatings

Experimental Investigation of Thermal Barrier (8YSZ-MGO-TIO2) Coated Piston used in Diesel Engine

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