scholarly journals Experimental Investigation of the Wear Behaviour of Coated Polymer Gears

Polymers ◽  
2021 ◽  
Vol 13 (20) ◽  
pp. 3588
Author(s):  
Brigita Polanec ◽  
Franc Zupanič ◽  
Tonica Bončina ◽  
Frančišek Tašner ◽  
Srečko Glodež
Keyword(s):  
Experimental Investigation ◽  
Magnetron Sputtering ◽  
Vapour Deposition ◽  
Research Work ◽  
Surface Coatings ◽  
Wear Behaviour ◽  
Second Step ◽  
Additional Testing ◽  
One Step ◽  
Tooth Flank

A comprehensive experimental investigation of the wear behaviour of coated spur polymer gears made of POM is performed in this study. The three physical vapour deposition (PVD) coatings investigated were aluminium (Al), chromium (Cr), and chromium nitrite (CrN). Al was deposited in three process steps: By plasma activation, metallisation of Al by the magnetron sputtering process, and by plasma polymerisation. Cr deposition was performed in only one step, namely, the metallization of Cr by the magnetron sputtering process. The deposition of CrN was carried out in two steps: the first involved the metallization of Cr by the magnetron sputtering process while the second step, vapour deposition, involved the reactive metallisation of Cr with nitrogen, also by the magnetron sputtering process. The gears were tested on an in-house developed testing rig for different torques (16, 20, 24 and 30 Nm) and rotational speed of 1000 rpm. The duration of the experiments was set to 13 h, when the tooth thickness, and, consequently, the wear of the tooth flank was recorded. The experimental results showed that the influence of metallisation with aluminium, chromium, and chromium nitrite surface coatings on the wear behaviour of the analysed polymer gear is not significant. This is probably due to the fact that the analysed coatings were, in all cases, very thin (less than 500 nm), and therefore did not influence the wear resistance significantly. In that respect, an additional testing using thicker coatings should be applied in the further research work.

Effect of Varying Load on DLC/AlCrN-Based Coated AISI D2 Die Steel at Constant Sliding Velocity

2017 ◽  
Author(s):  
Sukhinderpal Singh ◽  
Jasmaninder Singh Grewal
Keyword(s):  
Wear Resistance ◽  
Magnetron Sputtering ◽  
Sliding Wear ◽  
Vapour Deposition ◽  
Wear Behaviour ◽  
Physical Vapour Deposition ◽  
Deposition Technique ◽  
Dc Magnetron Sputtering ◽  
Die Steel ◽  
Aisi D2

This study has been made to limit the sliding wear by employing advanced protective nano coatings by using DC magnetron sputtering Physical Vapour Deposition technique. Three advanced nano coatings viz. Diamond-Like Carbon (DLC), composite AlCrN coating and AlCrN/TiAlN multilayered coatings were selected for present work due to their enviable wear resistant characteristics. Coatings were deposited on AISI-D2 die steel by traditional DC magnetron sputtering physical vapour deposition technique. The as deposited coatings were characterized with surface roughness, microhardness, porosity and microstructure. The X-Ray Diffraction (XRD) and field mission scanning electron microscope (FESEM with EDAX) techniques have been used to describe various phases established after coating deposited on the surface of the substrate. Subsequently, sliding wear and friction tests were conducted in accordance with ASTM standard G99-03, under scrutiny variation of load and time and at constant sliding speed. Cumulative wear volume loss and coefficient of friction were formulated for coated as well as uncoated/tempered specimen at a constant speed of 1 m/s and varying load of 25N and 50N. The results from experimentation were analysed with SEM micrographs and Energy dispersive spectrum to analyse the adaptability of coating for base materials, wear behaviour and friction behaviour of coated and uncoated/tempered substrates. The results have shown adaptability of advance nano-coatings for AISI D2 die steel. The generation of oxide layer during wear process provides wear resistance to the AlCrN-based coatings. No thermal instability has been observed in nano-coatings at low temperature generated while experimentation and that is under working range of cold forming processes. It is observed that there is relevant decrease in frictional force by the application of DLC coatings while AlCrN/TiAlN has provided much better wear resistance.

scholarly journals Wear behaviour of duplex (PN+PVD) treated layers produced on X42CR13 steel

2019 ◽  
Vol 9 (1) ◽  
pp. 3-11
Author(s):  
Shiraz Ahmed Siddiqui ◽  
Marosné Berkes Mária
Keyword(s):  
Vapour Deposition ◽  
Plasma Nitriding ◽  
Research Work ◽  
Surface Damage ◽  
Wear Behaviour ◽  
Different Temperatures ◽  
Increasing Demand ◽  
Improved Technology ◽  
Ball On Disc

Wear, corrosion and fatigue are among the most important mechanisms that lead to surface damage, which, ultimately, leads to failure of the components. There is an increasing demand for reducing failures and the related costs due to wear and surface shortcomings of heavily loaded engineering components. Thus, application of surface technologies gives a great potential for saving resources and providing improved technology. The presented research work involves characterization of a duplex treated i.e. plasma nitrided (at two different temperatures 520 °C, 550 °C) and PVD coated – X42Cr13/W plastic mould tool steel with special emphasis on the ball-on-disc wear behaviour of tested specimens. The objective is to study and evaluate the effect of different nitriding treatments prior to coating on the wear behaviour of specimens having different surface preparations. Also, it has been established that duplex treatment (plasma nitriding + physical vapour deposition [PVD] coating) gives better and improved properties as compared to individual treatments.

Large-area CsPbBr3 perovskite films grown with effective one-step RF-magnetron sputtering

2021 ◽  
Vol 129 (24) ◽  
pp. 245303
Author(s):  
Fan Xu ◽  
Yujiao Li ◽  
Beilei Yuan ◽  
Yongzheng Zhang ◽  
Haoming Wei ◽  
...  
Keyword(s):  
Magnetron Sputtering ◽  
Rf Magnetron Sputtering ◽  
Large Area ◽  
One Step

scholarly journals Thermal, Viscoelastic, Mechanical and Wear Behaviour of Nanoparticle Filled Polytetrafluoroethylene: A Comparison

Polymers ◽  
2020 ◽  
Vol 12 (9) ◽  
pp. 1940 ◽  
Author(s):  
Levente Ferenc Tóth ◽  
Patrick De Baets ◽  
Gábor Szebényi
Keyword(s):  
Room Temperature ◽  
Filler Content ◽  
Research Work ◽  
Tensile Modulus ◽  
Al2o3 Content ◽  
Wear Behaviour ◽  
X Ray ◽  
Mechanical Stirring ◽  
Wear Analysis ◽  
Sintering Method

In this research work, unfilled and mono-filled polytetrafluoroethylene (PTFE) materials were developed and characterised by physical, thermal, viscoelastic, mechanical, and wear analysis. The applied fillers were graphene, alumina (Al2O3), boehmite alumina (BA80), and hydrotalcite (MG70) in 0.25/1/4/8 and 16 wt % filler content. All samples were produced by room temperature pressing–free sintering method. All of the fillers were blended with PTFE by intensive dry mechanical stirring; the efficiency of the blending was analysed by Energy-dispersive X-ray spectroscopy (EDS) method. Compared to neat PTFE, graphene in 4/8/16 wt % improved the thermal conductivity by ~29%/~84%/~157%, respectively. All fillers increased the storage, shear and tensile modulus and decreased the ductility. PTFE with 4 wt % Al2O3 content reached the lowest wear rate; the reduction was more than two orders of magnitude compared to the neat PTFE.

Aerodynamic Investigation of Double Surface Airfoil

2021 ◽  
Vol 1 (2) ◽  
pp. 41-46
Author(s):  
Siva J ◽  
Suresh C ◽  
Paramaguru V
Keyword(s):  
Experimental Investigation ◽  
Flow Separation ◽  
Research Work ◽  
Aerodynamic Performance ◽  
Aircraft Industry ◽  
Aerodynamic Efficiency ◽  
Flight Vehicles ◽  
Double Surface ◽  
Naca 0012 ◽  
Aerodynamic Investigation

Aircraft industry has been deeply concerned about reduction of drag by reducing flow separation and improving the aerodynamic efficiency of flight vehicles, particularly in commercial and military market by adopting various methods. Reduction of flow separation is a concept by which we can increase aerodynamic efficiency. The purpose of the project is to perform an experimental investigation on aerodynamic performance of NACA 0012 airfoil model with and without splits. It is evident from this research work that the airfoil model with split possesses greater aerodynamic performance by producing lesser overall drag. This is due to the delay in flow separation from the surface.

One-step vapour phase growth of two-dimensional formamidinium-based perovskite and its hot carrier dynamics

2020 ◽  
Vol 22 (37) ◽  
pp. 21512-21519
Author(s):  
Ufuk Erkılıç ◽  
Hyun Goo Ji ◽  
Eiji Nishibori ◽  
Hiroki Ago
Keyword(s):  
Vapour Deposition ◽  
Vapour Phase ◽  
Carrier Dynamics ◽  
Two Dimensional ◽  
Deposition Method ◽  
Phase Growth ◽  
Hot Carrier ◽  
One Step

Square-shaped layered FA2PbI4 perovskite crystals were prepared using a one-step vapour deposition method, and the hot carrier dynamics of these crystals was studied.

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