A comparative Study on the Wear Behavior of Al2O3 and SiC Coated Ti-6Al-4V Alloy Developed Using Plasma Spraying Technique (original) (raw)
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International Journal of Nanomedicine, 2015
This paper presents the wear characteristics of the composite ceramic coating made with Al 2 O 3-40wt%8YSZ on the biomedical grade Ti-6Al-4V alloy (grade 5) used for total joint prosthetic components, with the aim of improving their tribological behavior. The coatings were deposited using a plasma spraying technique, and optimization of plasma parameters was performed using response surface methodology to obtain dense coating. The tribological behaviors of the coated and uncoated substrates were evaluated using a ball-on-plate sliding wear tester at 37°C in simulated body-fluid conditions. The microstructure of both the titanium alloy and coated specimen were examined using an optical microscope and scanning electron microscope. The hardness of the plasma-sprayed alumina-zirconia composite coatings was 2.5 times higher than that of the Ti-6Al-4V alloy, while the wear rate of Ti-6Al-4V alloy was 253 times higher than that of the composite-coated Ti-6Al-4V alloy. The superior wear resistance of the alumina-zirconia coated alloy is attributed to its enhanced hardness and intersplat bonding strength. Wear-track examination showed that the predominant wear mechanism of Ti-6Al-4V alloy was abrasive and adhesive wear, whereas, in the case of alumina-zirconia composite coated alloy, the wear was dominated by microchipping and microcracking.
Surface and Coatings Technology, 2000
O 3 +40% TiO 2 ) were studied using two different kinds of powder: one spray dried and one crushed and blended. The cooling rate during the thermal spray process was also considered, with the use of cryogenic cooling. The friction behavior and the wear resistance of the corresponding coatings were then evaluated in dry sliding conditions in two different configurations: block-on-ring (Amsler) and ball-on-disc. The microstructure of a coating is conditioned by the morphology of the powder and the cooling rate which modify the residual stresses in the coating. (B. Normand) and a coarser one in the second case ( ).
Materials Today: Proceedings, 2021
The present work deals with tribological investigation of Al 2 O 3-40% TiO 2 coating deposited using plasma spraying. The structural characterization of coating was done using Scanning Electron Microscopy (SEM), Energy Dispersive Spectroscopy (EDS) and X-Ray Diffraction (XRD). The micro hardness was measured by vickers micro hardness tester whereas fracture toughness was determined by Indentation Fracture Toughness Test (IFT) method. The sliding wear tests were carried out at different test conditions involving simultaneous variation of load (P) ranging from 5 to 30 N and sliding velocity (V) ranging from 0.1 m/sec to 0.6 m/sec. The sliding wear rate increased with increasing parameter P Â V and friction coefficient displayed minima at a load of 20 N and sliding velocity of 0.4 m/sec. The flash temperature showed the increasing trend with P Â V parameter. The variation in coefficient of friction and wear rate with varying test conditions was associated with change in wear mechanism from plastic grooving to delamination of splats & splat fracture and formation & removal of tribo layer of Ti 2 O 3 and Ti 3 O 5 on worn surface.
Wear behaviour of alumina plasma-sprayed coating on an AlCu alloy
Materials Letters, 1993
fuming oxide was plasma sprayed on the surface of Al+% Cu ahoy substrate. The mo~holo~ of the coating was studied thoroughly using optical and scanning electron microscopy. The abrasive wear behaviour of the alumina coating was examined using the disk on disk method (Taber abraser). The wear rate of the coating was higher at the beginning of the wear tests and depended on the applied load. A linear relationship was observed between the wear rate and the initial surface roughness of the
2014
Thermally-sprayed alumina based materials, e.g., alumina-titania (Al 2 O 3-TiO 2), are commonly applied as wear resistant coatings in industrial applications. Properties of the coatings depend on the spray process, powder morphology, and chemical composition of the powder. In this study, wear resistant coatings from Al 2 O 3 and Al 2 O 3-13TiO 2 powders were sprayed with plasma and high-velocity oxygen-fuel (HVOF) spray processes. Both, fused and crushed, and agglomerated and sintered Al 2 O 3-13TiO 2 powders were studied and compared to pure Al 2 O 3. The coatings were tested for abrasion, erosion, and cavitation resistances in order to study the effect of the coating structure on the wear behavior. Improved coating properties were achieved when agglomerated and sintered nanostructured Al 2 O 3-13TiO 2 powder was used in plasma spraying. Coatings with the highest wear resistance in all tests were produced by HVOF spraying from fused and crushed powders.
Wear behavior of plasma sprayed composite coatings with in situ formed Al2O3
Materials & Design, 2009
In the present study, the wear behavior of in situ formed Al 2 O 3 reinforced hypereutectic Al-18Si matrix composite coatings have been investigated. These coatings were successfully fabricated with mechanically alloyed Al-12Si and SiO 2 powder deposited on aluminum substrates by atmospheric plasma spraying (APS). The produced samples were characterized by means of microscopic examinations, hardness measurements and wear tests. The obtained results pointed out that the amount of in situ formed Al 2 O 3 particles increased with increasing spray distance and decreasing in-flight particle velocity and temperature, which was accompanied by an improvement in hardness and wear resistance.
Wear Behavior of Plasma Sprayed Nanostructured Al-SiCp Composite Coatings: A Comparative Study
Transactions of the Indian Institute of Metals, 2016
Powders of AlSi, 2024Al and 6061Al were separately ball milled with 15 wt% SiC reinforcement in a high-energy attrition ball mill using stainless steel balls for 8 h. The ball milled powders were plasma sprayed on the weathering steel (Cor-Ten) substrates to get Al-SiC composite coating with as much high volume fraction as possible of SiC. The microstructure characteristics of coatings were examined by SEM, XRD and image analyzer. XRD studies showed SiC p embedment in the Al matrix after ball milling, and nano grains in the ball milled powder and coatings. The thickness of coating and hardness were measured. The high adhesion-strength of the coatings observed might be attributed to higher degree of diffusion at the interface. The wear behaviors of the coatings were carried out under pin-on-disc wear test machine for 50 N load. Results showed that hardness and wear resistance of coatings depended on SiC p fraction and crystallite size in the matrix. The results of mechanical and wear tests also indicated that high-energy attrition ball milling and addition of SiC particles increased the strength, hardness and wear resistance of the coatings.
Abrasion, Erosion and Cavitation Erosion Wear Properties of Thermally Sprayed Alumina Based Coatings
Coatings, 2014
Thermally-sprayed alumina based materials, e.g., alumina-titania (Al 2 O 3 -TiO 2 ), are commonly applied as wear resistant coatings in industrial applications. Properties of the coatings depend on the spray process, powder morphology, and chemical composition of the powder. In this study, wear resistant coatings from Al 2 O 3 and Al 2 O 3 -13TiO 2 powders were sprayed with plasma and high-velocity oxygen-fuel (HVOF) spray processes. Both, fused and crushed, and agglomerated and sintered Al 2 O 3 -13TiO 2 powders were studied and compared to pure Al 2 O 3 . The coatings were tested for abrasion, erosion, and cavitation resistances in order to study the effect of the coating structure on the wear behavior. Improved coating properties were achieved when agglomerated and sintered nanostructured Al 2 O 3 -13TiO 2 powder was used in plasma spraying. Coatings with the highest wear resistance in all tests were produced by HVOF spraying from fused and crushed powders.
IJERT-Study on Sliding Wear Behavior of Plasma Sprayed TiO2-15%Inconel718 Coatings on Al6061
International Journal of Engineering Research and Technology (IJERT), 2016
https://www.ijert.org/study-on-sliding-wear-behavior-of-plasma-sprayed-tio2-15inconel718-coatings-on-al6061 https://www.ijert.org/research/study-on-sliding-wear-behavior-of-plasma-sprayed-tio2-15inconel718-coatings-on-al6061-IJERTV5IS030995.pdf In this paper, the tribological properties of plasma-sprayed coatings are studied. Plasma sprayed coating enhances the surface properties of the substrate material such as corrosion resistance and mechanical properties. Friction in rubbing surfaces causes wear and loss of energy. One way of improving surface resistance to wear is by applying coatings. Al 6061 alloy finds wide applications in the fields of automobile, aerospace , domestic etc.; however it is a soft material with poor wear resistance. To enhance the wear resistance of Al 6061, TiO2-15%Inconel 718 is deposited on Al 6061 alloy substrate using plasma spray technique. Using pin-on-disc tribometer, the tribological behavior of Al6061coated sample was studied under dry sliding conditions. The objective is to establish a correlation between dry sliding wear behavior of Al6061 and Al 6061 as coated with same wear parameters. The effect of wear parameters like applied load, sliding distance and speed on the sliding wear were studied. The results showed that the extent of variation of wear of coated specimen was very minimal and lesser compared to uncoated Al 6061 with increase in load, speed and sliding d instance.