Scores:
10
MNiSW
92.2
ICV
 
 

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

Andrzej Maruszczyk 1  ,  
Agata Dudek 1  ,  
 
1
Institute of Materials Engineering, Częstochowa University of Technology, Armii Krajowej Street 19, 42-200 Częstochowa, Poland
2
Department of Materials Engineering, Mechanical Engineering Faculty, Lublin University of Technology, Nadbystrzycka 36 Str., 20-618 Lublin, Poland
Adv. Sci. Technol. Res. J. 2017; 11(3):204–210
Publish date: 2017-09-03
KEYWORDS:
TOPICS:
ABSTRACT:
Titania (TiO2) 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 TiO2 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 TiO2-10 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 TiO2-10 wt.% NiAl coatings. Titania based coatings were deposited by means of atmospheric plasma sprayed on steel substrate using TiO2-10 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.
CORRESPONDING AUTHOR:
Mirosław Szala   
Department of Materials Engineering, Mechanical Engineering Faculty, Lublin University of Technology, Nadbystrzycka 36 Str., 20-618 Lublin, Poland