TRIBOLOGICAL PROPERTIES OF PLASMA SPRAYED Al2O3-13TiO2 NANOSTRUCTURED COATINGS

Tribologia ◽  
2018 ◽  
Vol 272 (2) ◽  
pp. 157-165 ◽  
Author(s):  
Wojciech ŻÓRAWSKI ◽  
Anna GÓRAL ◽  
Medard MAKRENEK ◽  
Sławomir ZIMOWSKI
Keyword(s):  
Coefficient Of Friction ◽  
Tribological Properties ◽  
Surface Engineering ◽  
Physical And Mechanical Properties ◽  
Ceramic Materials ◽  
Industrial Applications ◽  
System A ◽  
Plasma Sprayed Coatings ◽  
Plasma Sprayed ◽  
Sprayed Coatings

Ceramic materials are widely used in various industrial applications on components exposed to high temperature, wear, and corrosive conditions. Nowadays, nanostructured materials are of particular scientific interest because of their physical and mechanical properties, which are superior to those of conventional materials. Plasma spraying is one of the surface engineering techniques for depositing of the coatings with wide variety of properties necessary for industrial use. The work is concerned with a study of the microstructure and tribological properties of plasma sprayed coatings with nanostructured and conventional Al2O3-13TiO2 powders. The coatings were sprayed by means of a Plancer PN-120 plasma system. A T-01 ball on disc tribological tester was used to study their coefficient of friction on the basis of the friction force obtained in the course of continuous measurement at a set load. Results of investigations were compared with properties of the coatings sprayed with standard Al2O3-13TiO2. The nanostructured Al2O3-13TiO2 coating showed the lower coefficient of friction in comparison to the coatings sprayed from the conventional powder.

A Slip Damping Model for Plasma Sprayed Ceramics

2009 ◽  
Vol 76 (6) ◽  
Author(s):  
Peter J. Torvik
Keyword(s):  
Loss Modulus ◽  
Ceramic Materials ◽  
Amplitude Dependence ◽  
Air Plasma ◽  
Coating Materials ◽  
Average Value ◽  
Dissipative Mechanism ◽  
Plasma Sprayed Coatings ◽  
Plasma Sprayed ◽  
Sprayed Coatings

Ceramic materials applied by air plasma spray are used as components of thermal barrier coatings. As it has been found that such coatings also dissipate significant amounts of energy during vibration, they can also contribute to reducing the amplitude of resonant vibrations. In order to select a coating material for this purpose, or to adjust application parameters for increased dissipation, it is important that the specific mechanism, by which such dissipation occurs, be known and understood. It has been suggested that the dissipative mechanism in air plasma sprayed coatings is friction, along interfaces arising from defects between and within the “splats” created during application. An analysis, similar to that for the dissipation in a lap joint, is developed for an idealized microstructure characteristic of such coatings. A measure of damping (loss modulus) is extracted, and the amplitude dependence is found to be similar to that observed with actual coating materials. A critical combination of parameters is identified, and variations within the microstructure are accounted for by representing values through a distribution. The effective or average value of the storage (Young’s) modulus is also developed, and expressed in terms of the parameters of the microstructure. The model appears to provide a satisfactory analytical representation of the damping and stiffness of these materials.

scholarly journals The microstructure and selected mechanical properties of Al2O3 + 3 wt.% TiO2 plasma sprayed coatings

2019 ◽  
Vol 91 (6) ◽  
pp. 39-45 ◽  
Author(s):  
Monika Michalak ◽  
Leszek Łatka ◽  
Paweł Sokołowski
Keyword(s):  
Surface Engineering ◽  
High Hardness ◽  
Atmospheric Plasma ◽  
Spray Distance ◽  
Lower Porosity ◽  
Plasma Sprayed Coatings ◽  
Tio2 Coatings ◽  
Plasma Sprayed ◽  
Sprayed Coatings ◽  
Pure Al2o3

The Al2O3+TiO2 coatings are of the interest of surface engineering due to their high hardness and wear resistance but also increased toughness, when compared to pure Al2O3 ones. This article describes the deposition of Al2O3+3 wt.% TiO2 coatings by Atmospheric Plasma Spraying (APS) technique. The commercial AMI 6300.1 powder (-45 + 22 μm) was used as a feedstock. The 2k+1 spraying experiment, based on two variables, namely spray distance and torch velocity, was designed. The samples were characterized in the terms of morphology, microstructure, microhardness and roughness. It was observed that the shorter spray distance resulted in lower porosity, higher microhardness and lower roughness of coatings.

scholarly journals Microstructures and Tribological Properties of Al-Cu-Fe quasicrystalline plasma sprayed coatings

2016 ◽  
Vol 155 ◽  
pp. 012014 ◽  
Author(s):  
A A Lepeshev ◽  
E A Rozhkova ◽  
I V Karpov ◽  
A V Ushakov ◽  
L Yu Fedorov ◽  
...  
Keyword(s):  
Tribological Properties ◽  
Plasma Sprayed Coatings ◽  
Plasma Sprayed ◽  
Sprayed Coatings

TiC/Ti3AlC2–Co plasma-sprayed coatings with excellent high-temperature tribological properties

2018 ◽  
Vol 44 (18) ◽  
pp. 22520-22528 ◽  
Author(s):  
Hongfei Chen ◽  
Yaxiong Du ◽  
Duojin Wang ◽  
Chi Zhang ◽  
Guang Yang ◽  
...  
Keyword(s):  
High Temperature ◽  
Tribological Properties ◽  
Plasma Sprayed Coatings ◽  
Plasma Sprayed ◽  
Sprayed Coatings

Microstructure, adhesion, and tribological properties of conventional plasma-sprayed coatings on steel substrate

1995 ◽  
Vol 9 (7) ◽  
pp. 907-921 ◽  
Author(s):  
T.Z. Kattamis ◽  
M. Chen ◽  
R. Huie ◽  
J. Kelly ◽  
C. Fountzoulas ◽  
...  
Keyword(s):  
Tribological Properties ◽  
Steel Substrate ◽  
Plasma Sprayed Coatings ◽  
Plasma Sprayed ◽  
Sprayed Coatings

CHARACTERIZATION OF AS-SPRAYED AND LASER-TREATED ZIRCONIA-BASED PLASMA SPRAYED COATINGS

1990 ◽  
Vol 51 (C5) ◽  
pp. C5-393-C5-402
Author(s):  
A. FERRIERE ◽  
G. FLAMANT ◽  
J.-F. ROBERT ◽  
P. PEKSHEV ◽  
I. SMUROV ◽  
...  
Keyword(s):  
Plasma Sprayed Coatings ◽  
Plasma Sprayed ◽  
Sprayed Coatings
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