scholarly journals Influence of particle temperature and velocity on the microstructure and mechanical behaviour of high velocity oxy-fuel (HVOF)-sprayed nanostructured titania coatings

2008 ◽  
Vol 198 (1-3) ◽  
pp. 426-435 ◽  
Author(s):  
M. Gaona ◽  
R.S. Lima ◽  
B.R. Marple
Keyword(s):  
Mechanical Behaviour ◽  
High Velocity ◽  
Particle Temperature ◽  
Titania Coatings ◽  
Nanostructured Titania

Cold Spray Construction of Nanostructured Titania Coatings for Photocatalytic Applications

2021 ◽  
Author(s):  
Jin Liu ◽  
Yi Liu ◽  
Xinkun Suo ◽  
Leszek Latka ◽  
Aleksandra Małachowski ◽  
...  
Keyword(s):  
Cold Spray ◽  
Titania Coatings ◽  
Photocatalytic Applications ◽  
Nanostructured Titania

Electrical and structural characterisation of nanostructured titania coatings deposited on interdigitated electrode system

2011 ◽  
Vol 130 (1-2) ◽  
pp. 769-774 ◽  
Author(s):  
Marija Milanović ◽  
Goran Stojanović ◽  
Ljubica M. Nikolić ◽  
Milan Radovanović ◽  
Branko Škorić ◽  
...  
Keyword(s):  
Electrode System ◽  
Interdigitated Electrode ◽  
Structural Characterisation ◽  
Titania Coatings ◽  
Nanostructured Titania

scholarly journals The Effect of Interface Chemical Bonds on the Behaviour of Nanotube-Polyethylene Composites Under Nano-Particle Impacts

2007 ◽  
Vol 4 (1) ◽  
pp. 122-126 ◽  
Author(s):  
K. Mylvaganam ◽  
L. C. Zhang ◽  
W. C. D. Cheong
Keyword(s):  
Carbon Nanotubes ◽  
Molecular Dynamics ◽  
Mechanical Behaviour ◽  
High Velocity ◽  
Molecular Dynamics Method ◽  
Nano Composites ◽  
Chemical Bonds ◽  
Nano Particle ◽  
Dynamics Method ◽  
Polyethylene Composites

This paper uses the molecular dynamics method to investigate the influence of chemical bonds on the mechanical behaviour of nanotube–polyethylene composites subjected to nano-particle impacts. In the analysis, carbon nanotubes (CNTs) were incorporated into the polyethylene (PE) matrix in two ways, with and without radical centres, so that the resulting nano-composites had two corresponding properties, i.e., with and without chemical bonds at the CNT–PE interfaces. A spherical diamond nano-particle was used to impact and penetrate into the composites with a high velocity. It was found that the interface chemical bonds play an important role in the composite reinforcement.

Micro- and Nanostructure of Titania Coatings Modified with Functional Ceramic Nanoparticles

2014 ◽  
Vol 1064 ◽  
pp. 165-170
Author(s):  
Marina Alekseevna Fomina ◽  
Igor Vladimirovich Rodionov ◽  
Albert Viktorovich Korolev ◽  
Aleksandr Aleksandrovich Fomin
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Surface Modification ◽  
Morphological Characteristics ◽  
Induction Heat ◽  
Induction Heat Treatment ◽  
Ceramic Nanoparticles ◽  
Titania Coatings ◽  
Nanostructured Titania ◽  
Functional Ceramic

The article describes prospective nanostructured titania coatings modified with functional ceramic nanoparticles and obtained on surface of titanium items. Consistency changes of morphological characteristics and crystalline structure, physico-mechanical properties of experimental titania coatings obtained by the combination of oxidation and surface modification with ceramic nanoparticles during induction heat treatment are defined.

Evaluation of Four High Velocity Thermal Spray Guns Using WC-10Co-4Cr Cermets

2000 ◽  
Author(s):  
J.G. Legoux ◽  
B. Arsenault ◽  
C. Moreau ◽  
V. Bouyer ◽  
L. Leblanc
Keyword(s):  
Tungsten Carbide ◽  
Thermal Spray ◽  
Particle Velocity ◽  
High Velocity ◽  
Vickers Microhardness ◽  
Particle Temperature ◽  
Deposition Efficiency ◽  
Plasma Gun ◽  
Flight Velocity ◽  
Standard Version

Abstract Four high velocity thermal spray guns were evaluated in the production of 10%Co-4%Cr tungsten carbide cermets. Three HVOF guns (the JP-5000, JP-5000ST and DJ-2700) and one plasma gun, (the Mettech Axial III) were used to spray the same angular, agglomerated and crushed WC-10Co-4Cr powder. The DPV-2000 was used to monitor the in-flight velocity and temperature of the WC cermet sprayed particles. From those values, spray conditions were selected to produce coatings that were evaluated in terms of porosity, hardness and deposition efficiency. Results show that the plasma Axial III provides the highest particle temperature, between 2000°C and 2600°C, depending on the spray conditions. The JP-5000 imparts the highest velocity to the particles, between 550 m/s and 700 m/s, depending on the spray conditions. The ST version of the JP-5000 provides the same velocity as the standard version but with lower particle temperature. The DJ-2700 sprays particles with temperature and velocity between those of the JP5000 and the Mettech Axial III. Minimum porosity values of 2.1%, 3.7% and 5.3%) were obtained for the JP-5000, the DJ-2700 and the Axial III guns respectively. The porosity and carbide degradation are found to mostly depend on the particle velocity and temperature respectively. The values for the Vickers microhardness number (200g) ranged from 950 to 1250. Measurements of the deposition efficiency indicated a variation between 10 and 80%o, depending on the spray conditions and the gun used.

Experimental Study of Tensile Preloading Influence on the Mechanical Behaviour of Pseudo-Ductile Hybrid Composite under High-Velocity Impact

2021 ◽  
Vol 410 ◽  
pp. 642-648
Author(s):  
Nikita A. Olivenko ◽  
Oleg A. Kudryavtsev ◽  
Mikhail V. Zhikharev
Keyword(s):  
Experimental Study ◽  
Mechanical Behaviour ◽  
Hybrid Composite ◽  
High Velocity ◽  
Hybrid Composites ◽  
Fracture Pattern ◽  
Low Velocity Impact ◽  
High Velocity Impact ◽  
Low Velocity ◽  
Velocity Impact

The hybridisation of fibre-reinforced plastics is one of the perspective technological methods that make it possible to reduce the sensitivity of polymer composites to stress concentration and increase their damage tolerance. In this case, hybridisation means a combination of different types of reinforcing fibres in one yarn, one layer or one package. In most published papers, the authors investigated the mechanical behaviour of hybrid fibre-reinforced plastic under static loading or low-velocity impact conditions only. At the same time, statically preloaded structures made of composite materials can also be subjected to high-velocity impact. Tensile or compressive preloading affects not only the amount of energy absorbed by the composite but also changes the deformation and fracture pattern. This paper presents the results of the experimental study of the mechanical behaviour of a woven carbon/aramid hybrid composite under tensile preloading and high-velocity impact. Pre-tensioned specimens of homogeneous and hybrid composites were subjected to a high-velocity impact by a steel spherical projectile with the velocities up to 900 m/s. The experimental results showed that the hybrid composite had the lowest sensitivity of the ballistic limit to the tensile preloading.

Photocatalytic activity of nanostructured titania coatings on aluminum substrates

2017 ◽  
Vol 53 (11) ◽  
pp. 1180-1184 ◽  
Author(s):  
A. V. Baglov ◽  
N. M. Denisov ◽  
V. E. Borisenko ◽  
V. V. Uglov ◽  
A. A. Malashevich
Keyword(s):  
Photocatalytic Activity ◽  
Titania Coatings ◽  
Aluminum Substrates ◽  
Nanostructured Titania
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