Journal ArticleDOI
Microstructure and Corrosion Behaviour of Plasma Sprayed Bilayered Ceramic Coatings
S. Sathish,M. Geetha +1 more
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In this paper, the fabrication of ZrO2, Al2O3, Al 2O3/ZrO3 and Al 2 O3/Al2O2 coatings on 304 stainless steel substrate by atmospheric plasma spraying is described.Abstract:
This paper deals with the fabrication of ZrO2, Al2O3, ZrO2/Al2O3 and Al2O3/ZrO2 coatings on 304 stainless steel substrate by atmospheric plasma spraying. The microstructure and phase composition of the as-sprayed coatings were examined by scanning electron microscopy and X-ray diffraction. Hardness measurements were carried out using a Vickers hardness testing machine. Corrosion behaviour of the coatings was studied by salt spray testing in a mist of 5 wt% NaCl. Results indicate that the bilayered Al2O3/ZrO2 coating exhibits superior corrosion resistance when compared with that of the other coatings and this is ascribed to the presence of dense microstructure with very few pores in the coating.read more
Citations
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Processing and characterisation of plasma sprayed oxides: Microstructure, phases and residual stress
TL;DR: In this paper, the authors characterized the cross-section, surface morphology, phase composition, indentation fracture toughness, elastic modulus and residual stresses of ceramic coatings using transmission electron microscopy.
Journal ArticleDOI
Influence of Fine Al2O3 and Aluminium Nano-Particles on the 6061 Aluminium Alloy near the Grain Boundary of the Semi-Solid Cast Microstructure
Mayank Agarwal,Rajeev Srivastava +1 more
TL;DR: Dual mixed slurry for AA6061/Al2O3-Al powder was formed under argon gas protection and used to fabricate composite due to the effect of free vortex flow in semi-solid stage as discussed by the authors.
Journal ArticleDOI
Role of Hybrid Addition of CNTs and GNPs on Corrosion Behavior of Plasma Sprayed Aluminum Oxide Nanocomposite Coating
Krishna Kant Pandey,Aminul Islam,Rakesh Kumar,Rahul Ghosh,Venugopal Arjunan,Anup Kumar Keshri +5 more
Journal ArticleDOI
Interfacial Microstructure and Bonding Properties of Plasma-Sprayed Multilayer Ceramic Coating (Al 2 O 3 /BaTiO 3 /Al 2 O 3 -40 wt.% TiO 2 )
Zhou Li,Zhi-guo Xing,Hai-dou Wang,He Pengfei,Qing-bo Mi,Qing-bo Mi,Guo Weiling,Yanfei Huang,Tang Ling,Tang Ling,He-fa Zhu,He-fa Zhu,Xian-yong Zhu,Xian-yong Zhu +13 more
TL;DR: In this paper, the interfacial bonding state and adhesive strength of a plasma-sprayed single-layer coating (Al2O3), a double-layer and a three-layer polypropylene polysilicon (polysilicon)-coating was investigated, as well as their phase composition and microstructure.
References
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Journal ArticleDOI
Abrasive wear behaviour of conventional and nanocomposite HVOF-sprayed WC–Co coatings
TL;DR: In this article, the performance of conventional and nanostructured materials in the form of coatings deposited by high velocity oxy-fuel (HVOF) thermal spraying was examined, and it was found that the nanocomposite had a poorer wear resistance than the conventional coating under all the conditions examined.
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Abrasive wear characteristics of plasma sprayed nanostructured alumina/titania coatings
TL;DR: In this paper, the authors used the plasma spray technique to deposit coatings with reconstituted nanostructured Al 2 O 3 /TiO 2 powders and evaluated the abrasive wear resistance of the ceramic coatings using diamond abrasives.
Journal ArticleDOI
Microstructure development of Al2O3-13wt.%TiO2 plasma sprayed coatings derived from nanocrystalline powders
TL;DR: In this article, the development of constituent phases and microstructure in plasma sprayed Al2O3-13wt.%TiO2 coatings and reconstituted nanocrystalline feed powder was investigated as a function of processing conditions.
Journal ArticleDOI
Tribological properties of nanostructured and conventional WC–Co coatings deposited by plasma spraying
TL;DR: In this paper, the wear and friction properties of nanostructured and conventional WC-Co coatings against alumina under dry friction conditions were comparatively studied, and it was found that the wear resistance of the nano-structured WC-co coating is superior to that of conventional WCCo coating, especially under high load conditions.
Journal ArticleDOI
Influence of Fracture Toughness on the Wear Resistance of Yttria‐Doped Zirconium Oxide
TL;DR: Yttria-doped zirconium oxide was prepared by varying the yttria conent as discussed by the authors, and the fracture toughness of the materials were 11.6, 8.7, and 2.5 Mpa · m½, respectively.