Influences of laser remelting on microstructure of nanostructured Al2O3–13wt.% TiO2 coatings fabricated by plasma spraying

Wang, Dongsheng; Tian, Zongjun; Shen, Lida; Liu, Zhidong; Yin-hui, Huang

doi:10.1016/j.apsusc.2008.11.082

Cited by 48 publications

(26 citation statements)

References 22 publications

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“…The presence of thermodynamically stable ␣-Al 2 O 3 within the coating surface is a characteristic feature of laser-treated Al 2 O 3 , which is in agreement with previous investigations. [36][37][38][39] The XRD pattern of the LaPO 4 -clad 8YSZ coating surface is shown in Fig. 3, together with the data of LaPO 4 feed powder.…”

Section: Characterizations Of Coatings Before and After Laser Claddingmentioning

confidence: 98%

Hot-corrosion behaviors of overlay-clad yttria-stabilized zirconia coatings in contact with vanadate–sulfate salts

Zhong

Wang

et al. 2010

Journal of the European Ceramic Society

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Section: Characterizations Of Coatings Before and After Laser Claddingmentioning

confidence: 98%

Hot-corrosion behaviors of overlay-clad yttria-stabilized zirconia coatings in contact with vanadate–sulfate salts

Zhong

Wang

et al. 2010

Journal of the European Ceramic Society

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“…Some example of nanostructured ceramic coatings obtained by APS from agglomerated powders include alumina [16,17], titania [18,19], alumina-titania [14,20], yttria-stabilised zirconia [21,22] or pyrochlore [23].…”

Section: Introductionmentioning

confidence: 99%

Effect of TiO 2 addition on the microstructure and nanomechanical properties of Al 2 O 3 Suspension Plasma Sprayed coatings

Bannier

Vicent

Rayón

et al. 2014

Applied Surface Science

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Versión / Versió:Preprint were used as starting materials. The coatings microstructure and phase composition were fully characterised using FEG-SEM and XRD techniques. Nanoindentation technique was used to determine the coatings hardness and elastic modulus properties.Results have shown that the addition of titania to alumina SPS coatings causes different crystalline phases and a higher powder melting rate is reached. The higher melted material achieved, when titania is added leads to higher hardness and elastic modulus when the same spraying parameters are used.

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“…During the LR process, the grain diameter increased with increasing laser input energy and the self-cooling rate of grains decreased [31]. Therefore, the time taken for grain growth differed according to the self-cooling rates of grains [17]. This was because the remelting time of the Al-Ti-Ni coating in the molten pool increased with increasing LR powers, and the convective mass transfer occurred in the molten pool.…”

Section: Image Mapping Of Al-ti-ni Coating Surfacementioning

confidence: 92%

“…The short-duration and high-density laser leads to high-speed heating and melting, which is inevitably followed by a rapid solidification process. The high cooling rate of the rapid solidification process (10 5 -10 8 K/s) naturally achieved by LR is advantageous for the formation of amorphous alloys [17][18][19], which when used as coatings improve the corrosion resistance of metallic material. Moreover, LR can eliminate pores, destroy the layered structure, and remelt the entire thickness of the arc-sprayed coating; this results in the formation of a metallurgical bonding between the Al coating and the substrate and provides an extremely low rate of dilution of the coating, which is, in turn, beneficial for improving the bonding strength and corrosion resistance of the coating [20][21][22].…”

Section: Introductionmentioning

confidence: 99%

Effect of Laser Remelting Power on Immersion Corrosion of Amorphous Al–Ti–Ni Coatings

Chen

Dejun

2018

Coatings

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An arc-sprayed amorphous Al-Ti-Ni coating on S355 structural steel was processed by laser remelting (LR) at powers of 600, 800, and 1000 W. The surface-cross-sectional morphologies, chemical element distributions, and phase compositions of the as-obtained Al-Ti-Ni coatings were analyzed using a scanning electron microscope (SEM), energy-dispersive spectrometer (EDS), and X-ray diffractometer (XRD), respectively. The immersion corrosion tests of Al-Ti-Ni coatings in 3.5% NaCl solution for 720 h were performed to investigate the effects of LR power on their immersion corrosion behaviors. The test results show that the amorphous Al-Ti-Ni coatings form good metallurgical bonding with the substrate after LR. The AlNi, Al 3 Ti, Al 3 Ni 2 , Ti 3 O 5 , and Al 2 O 3 amorphous phases are detected in the Al-Ti-Ni coatings after LR. The corrosion potentials of Al-Ti-Ni coatings after LR show a positive shift relative to that of S355 steel, implying that the corrosion resistance of Al-Ti-Ni coatings was superior to that of S355 steel. A dense protective Al 2 O 3 film is formed on the Al-Ti-Ni coating surface at an LR power of 1000 W, at which power the highest corrosion potential of −0.233 V is observed. The corrosion mechanisms of Al-Ti-Ni coating at the LR power of 1000 W are uniform corrosion and pitting corrosion, while those of Al-Ti-Ni coatings at the LR powers of 600 and 800 W are localized corrosion and pitting corrosion. The corrosion resistance of Al-Ti-Ni coating with the LR power of 1000 W is better than those at the LR powers of 600 and 800 W, effectively improving the corrosion resistance of S355 steel.

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Influences of laser remelting on microstructure of nanostructured Al2O3–13wt.% TiO2 coatings fabricated by plasma spraying

Cited by 48 publications

References 22 publications

Hot-corrosion behaviors of overlay-clad yttria-stabilized zirconia coatings in contact with vanadate–sulfate salts

Hot-corrosion behaviors of overlay-clad yttria-stabilized zirconia coatings in contact with vanadate–sulfate salts

Effect of TiO 2 addition on the microstructure and nanomechanical properties of Al 2 O 3 Suspension Plasma Sprayed coatings

Effect of Laser Remelting Power on Immersion Corrosion of Amorphous Al–Ti–Ni Coatings

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