Alternant phase distribution and wear mechanical properties of an Al 2 O 3 -40 wt%TiO 2 composite coating

Luo, Huilong; Song, Peng; Khan, Asghar; Feng, Jing; Zang, Junjie; Xiong, Xiping; Lu, Jiansheng; Lu, Jian

doi:10.1016/j.ceramint.2017.03.029

Cited by 37 publications

(8 citation statements)

References 33 publications

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“…Bertrand et al [2] described that the hardness values published for the rutile TiO 2 are between 580 and 700 HK and the values commonly measured for the anatase TiO 2 are between 550 and 580 HK. The results obtained for coating microhardness measurements 602±5 HK are on the similar level as presented in [2] , however the lower level than hardness depicted for TiO 2 [8,9] and Al 2 O 3 -TiO 2 [16,19] plasma sprayed coatings. It indicates the influence of plasma spraying process on hardness results.…”

Section: Resultssupporting

confidence: 67%

“…Moreover, TiO 2 coatings with addition of NiAl can be sprayed on engine elements because of their resistance do high temperature oxidation and creep [3,5,12,13]. However, microstructure and properties of TiO 2 with addition of Al 2 O 3 powders are discussed in particular, as stated in the literature [11,16,20]. In the specialised literature and technical notes, a little information about coatings deposited with TiO 2 -10 wt.% NiAl feedstock powder is given.…”

Section: Introductionmentioning

confidence: 99%

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Research into Morphology and Properties of TiO2 – NiAl Atmospheric Plasma Sprayed Coating

Maruszczyk¹,

Dudek²,

Szala³

2017

Adv. Sci. Technol. Res. J.

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Titania (TiO 2 ) based coatings are ceramic products with unique properties that make them widely applicable (e.g. in automotive industry, optoelectronics, chemical processing or medicine). Atmospheric plasma spray process enables to deposit TiO 2 with addition of NiAl feedstock material which has an influence on coating cohesion and adhesion to substrate. However, the literature and technical notes give little information about parameters of spraying of TiO 2 -10 wt.% NiAl feedstock powders enables producing coating without nonuniformities including cracks and delamination form substrate. The aim of the work was to verify the parameters of plasma spraying by evaluation of the morphology and properties of manufactured the TiO 2 -10 wt.% NiAl coatings. Titania based coatings were deposited by means of atmospheric plasma sprayed on steel substrate using TiO 2 -10 wt.% NiAl feedstock powders. Morphology and microstructure were examined using light optical microscope (LOM) and scanning electron microscope (SEM). Coating chemical composition were analysed by means of SEM-EDS method. Coating surface topography and Knoop microhardness were determined. Porosity and thickness were evaluated by using quantities image analysis programme. Plasma spraying parameters used in our research allow to obtain uniform coating without cracks and delamination at coating-substrate interface. It acknowledges that uniformity of coating technological properties as well manufactured coatings can be put to wear tests, such as high temperature oxidation, corrosion, erosion or cavitation erosion resistance evaluation.

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Section: Resultssupporting

confidence: 67%

Section: Introductionmentioning

confidence: 99%

Research into Morphology and Properties of TiO2 – NiAl Atmospheric Plasma Sprayed Coating

Maruszczyk¹,

Dudek²,

Szala³

2017

Adv. Sci. Technol. Res. J.

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“…In the rst case, during dry sliding, micro-cracks and dislocated networks may yield wear debris as detected inside pits. The wear particles are trapped in the contact interface and are subjected to continuous fracture, distortion or chemical reaction, producing micro-sized powders [55]. For Al 2 O coating, the wear coe cient suddenly increases at 400 o C due to chippings or spalling from the substrate.…”

Section: Wear Mechanismmentioning

confidence: 99%

Comparative Investigation on Thermally Sprayed Al2O3, Al2O3-13%(TiO2) and Al2O3-40%(TiO2) Composite Coatings from Room to 400 °C Temperature

Kumar¹,

Murtaza²,

Walia³

2021

Preprint

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The aim of this research is to study the comparative wear behaviour of pure Al2O3 with varying TiO2 content due to the high demand in the industry for high temperature applications such as the automotive industry (piston ring and liner), petrochemicals industry (pump sleeves) and textile industry tools which require the hard bearing surface, abrasion resistance and particle corrosion at the temperature of up to 400 °C. In the present study, three coatings of Al2O3, Al2O3-13%(TiO2) and Al2O3-40%(TiO2) composite coatings were deposited by the thermally flame spray process. The comparative wear behaviour of the Al2O3-TiO2 coatings has been studied under high temperature of up to 400°C using a high temperature tribometer at a constant load of 40N. Before the wear test, the mechanical properties of the coated samples such as microhardness and surface roughness were studied. The morphological analysis was determined by field emission scanning electron microscope, elemental dispersion spectroscopy and X-ray powder diffraction techniques. The results reveal that specific wear rate decreases with a rise in temperature for all the deposited coating except Al2O3 coating at 400°C. The friction coefficient of deposited three alumina based coatings is decreasing with the increasing temperature. The research reveals that the Al2O3-40%TiO2 coating has the highest wear resistance properties as well as a low coefficient of friction due to its low hardness and high adhesion properties. For Al2O3-40%TiO2 coating the measured values of specific wear rate varying from 0.034567*10-3 mm3/Nm to 0.014581*10-3 mm3/Nm and the average values of coefficient friction ranging from 0.7284 to 0.3901 as temperature varying from room temperature to 400°C. In the worn out surface of deposited coatings, brittle fracture and abrasive wear behaviour were observed from room temperature to 400°C.

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“…Al 2 O 3 -xwt.%TiO 2 , as one of the most widely used ceramic coating materials, is used in plasma spraying to improve the corrosion resistance of metal surfaces [7,8]. Compared with a single alumina coating, an Al 2 O 3 -xwt.%TiO 2 coating doped with TiO 2 has better wear resistance and toughness, despite the loss of some surface hardness [9][10][11]. Nevertheless, the pores, cracks, and non-liquefied particles in the Al 2 O 3 -xwt.%TiO 2 coating prepared by plasma spraying are the main factors affecting the performance of the coating [12][13][14].…”

Section: Introductionmentioning

confidence: 99%

Effect of Vacuum Heat Treatment on the Element Diffusion Behavior and Corrosion Resistance of Al2O3-3wt.%TiO2 Coating of Q235 Steel

Liu

Wang

et al. 2022

Materials

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In this study, we address the effect of vacuum heat treatment on the morphology of Al2O3-3wt.%TiO2 coating, element diffusion behavior, coating hardness, and corrosion resistance. The pores, cracks, and non-liquefied particles on the as-heat treated coating surface of the vacuum-heat-treated coating were observed and compared with the as-sprayed coating using a scanning electron microscope. The diffusion behavior of the elements in the coating was demonstrated by using a line scanning of a cross-section of the coating. Hardness and corrosion-resistance test results were used to judge the effect of a vacuum heat treatment on the coating. The research results show that compared with atmospheric heat treatment, the vacuum heat treatment had less effect on the pores, cracks, and non-liquefied particles on the surface of the coating. However, in the absence of new oxide formation, the pores and cracks in the cross-section of the coating were significantly improved by the vacuum heat treatment. The surface hardness and corrosion resistance of the coating were significantly improved. The crack defects were eliminated, and the uniformity of TiO2 distribution was improved, which are the main factors that improved the coating performance after vacuum heat treatment. The combination of the coating and the substrate is strengthened, and an Al2O3 and TiO2 interdiffusion zone is formed when the coating undergoes vacuum heat treatment, which is the main mechanism improving the performance of the AT3 coating.

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Alternant phase distribution and wear mechanical properties of an Al 2 O 3 -40 wt%TiO 2 composite coating

Cited by 37 publications

References 33 publications

Research into Morphology and Properties of TiO2 – NiAl Atmospheric Plasma Sprayed Coating

Research into Morphology and Properties of TiO2 – NiAl Atmospheric Plasma Sprayed Coating

Comparative Investigation on Thermally Sprayed Al2O3, Al2O3-13%(TiO2) and Al2O3-40%(TiO2) Composite Coatings from Room to 400 °C Temperature

Effect of Vacuum Heat Treatment on the Element Diffusion Behavior and Corrosion Resistance of Al2O3-3wt.%TiO2 Coating of Q235 Steel

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