scholarly journals Thin Films: Study of the Influence of the Micro-Abrasive Wear Modes on the Volume of Wear and Coefficient of Friction

2019 ◽  
Author(s):  
Ronaldo Câmara Cozza
Keyword(s):  
Thin Films ◽  
Abrasive Wear ◽  
Coefficient Of Friction ◽  
Wear Modes

scholarly journals INFLUENCE OF ABRASIVE WEAR MODES ON THE COEFFICIENT OF FRICTION OF THIN FILMS

2018 ◽  
Vol 15 (4) ◽  
pp. 504-509 ◽  
Author(s):  
Ronaldo Câmara Cozza ◽  
Jorge Thiago de Sousa Lima Wilcken ◽  
Cláudio Geraldo Schön
Keyword(s):  
Thin Films ◽  
Abrasive Wear ◽  
Coefficient Of Friction ◽  
The Coefficient Of Friction ◽  
Wear Modes

Mechanical Behaviour of Sputtered Aluminium Thin Films under High Sliding Loads

2019 ◽  
Vol 796 ◽  
pp. 67-73 ◽  
Author(s):  
Fredrick M. Mwema ◽  
Esther Titilayo Akinlabi ◽  
Oluseyi Philip Oladijo
Keyword(s):  
Thin Films ◽  
Substrate Temperature ◽  
Coefficient Of Friction ◽  
Stainless Steel Substrate ◽  
Steel Substrate ◽  
Rf Magnetron Sputtering ◽  
Wear Behaviour ◽  
Material Loss ◽  
Significant Coefficient ◽  
The Coefficient Of Friction

In this work, the wear behaviour of thin aluminium films deposited on stainless-steel substrate through rf magnetron sputtering is studied. The coefficient of friction and material loss are characterised as functions of the substrate temperature (Ts) of the deposited aluminium thin films. It was observed that due to the evolving microstructural and roughness properties of the films with the substrate temperature, the material behaviour of the films under extremely high wear loads significantly depend on the substrate temperature. The most significant coefficient of friction was observed at 60oC and 80oC, and highest material loss was recorded at 100oC. The material loss and variation of coefficient of friction were related to the morphology (porosity and roughness) of the sputtered aluminium thin films.

A Theory for the Effects of Film Thickness and Normal Load in the Friction of Thin Films

1969 ◽  
Vol 91 (3) ◽  
pp. 551-555 ◽  
Author(s):  
E. F. Finkin
Keyword(s):  
Thin Films ◽  
Film Thickness ◽  
Coefficient Of Friction ◽  
Normal Load ◽  
Special Theory ◽  
Constant Load ◽  
Constant Thickness ◽  
Variable Load ◽  
Solid Friction ◽  
Contact Situation

The effect of film thickness in solid friction is reviewed. Two regimes are distinguished: (a) increasing coefficient of friction with decreasing film thickness which occurs for ultrathin films and (b) decreasing coefficient of friction with decreasing film thickness which occurs for thin films. The former regime has previously been treated by the author; consequently, attention is focused on the latter regime. A review of the thin film phenomenon establishes that it is very much dependent on the type of deformation occurring at the contact and concludes that no single expression can uniquely describe it for all materials situations. A special theory is put forth for the contact situation corresponding to a model of an elastic layer of much less rigidity than its substrate and indenter. This situation corresponds to practically all naturally occurring and bonded nonmetallic solid lubricant films of industrial and scientific interest. It is shown that coefficient of friction f obeys the relation f ∝ 1/P for variable load P and constant thickness h, f ∝ h for constant load and variable film thickness, and f ∝ h/P for the general case. These expressions are verified by use of data from pin-on-disk tests, Falex tests, 4-ball tests, modified MacMillan tests, and other types of tests. The experimental data are for naturally formed graphite on diamond, SiO2 bonded PbO on stainless steel, and phenolic bonded 9MoS2-1 graphite films on steel and aluminum.

Evolution of coefficient of friction with deposition temperature in diamond like carbon thin films

2012 ◽  
Vol 112 (2) ◽  
pp. 023525 ◽  
Author(s):  
S. Kataria ◽  
Sandip Dhara ◽  
Harish C. Barshilia ◽  
S. Dash ◽  
A. K. Tyagi
Keyword(s):  
Thin Films ◽  
Coefficient Of Friction ◽  
Deposition Temperature ◽  
Diamond Like Carbon ◽  
Carbon Thin Films

Amorphous Carbon Thin Films for Interfaces in MEMS

2005 ◽  
Author(s):  
K. Malyska ◽  
Ali Erdemir ◽  
Sergey A. Chizhik ◽  
Zygmunt Rymuza ◽  
Lukasz Ratajczyk
Keyword(s):  
Thin Films ◽  
Coefficient Of Friction ◽  
Amorphous Carbon ◽  
Tribological Behavior ◽  
Lateral Force ◽  
Maximum Depth ◽  
Carbon Thin Films ◽  
Deposited Films

Friction and nanoscratch tests were performed on amorphous carbon thin films deposited on silicon. The effect of process and conditions on CVD deposited films was studied. Coefficient of friction between the films was estimated by using a special oscillating microtribometer. The lateral force and maximum depth of scratching were measured during nanoscratch tests. The comparison of tribological behavior of the tested films is presented and discussed.

scholarly journals A Finite Element Approach to Modeling Abrasive Wear Modes

2016 ◽  
Vol 60 (4) ◽  
pp. 711-718 ◽  
Author(s):  
Martijn Woldman ◽  
Emile Van Der Heide ◽  
Tiedo Tinga ◽  
Marc A. Masen
Keyword(s):  
Finite Element ◽  
Abrasive Wear ◽  
Finite Element Approach ◽  
Element Approach ◽  
Wear Modes

Research on the Friction and Wear Properties of the NBR under Dry Sliding and Water Lubrication

2013 ◽  
Vol 420 ◽  
pp. 234-239
Author(s):  
Feng Yan Yang ◽  
Shi Jie Wang ◽  
Xiao Ren Lv
Keyword(s):  
Friction Coefficient ◽  
Abrasive Wear ◽  
Coefficient Of Friction ◽  
Testing Machine ◽  
Water Lubrication ◽  
Wear Testing ◽  
Wear Loss ◽  
Dry Sliding ◽  
Wear Properties ◽  
Lubrication Performance

The wear mechanisms of different graphite contents of NBR by 45# steel under dry sliding and water lubrication were investigated. On MPV-600 computer-controlled abrasive wear testing machine, the coefficients of friction were measured continuously. Results showed that under dry sliding condition, the rubber wear loss is big, the coefficient of friction is higher, the temperature of the friction surface is rise obviously. Wear loss and friction coefficient of NBR decrease with the increase of graphite contents; With the increase of graphite contents wear loss and the friction coefficient decreases, and is mainly due to the graphite lubrication performance and increase the stiffness of the rubber contact area. At low content of graphite, adhesive wear of NBR is showed, in the high content of graphite, abrasive wear is showed. Water lubrication condition, wear surface level off, the wear loss is very small, and the lubrication and cooling effect of water makes the friction coefficient decrease. Graphite content is higher, the wear loss and coefficient of friction is smaller.

Wear Resistance of NiCoCrAlY Alloy Coating by Cold Spraying

2014 ◽  
Vol 898 ◽  
pp. 47-50
Author(s):  
Sheng Qiang Feng ◽  
Bing Ma ◽  
Xiu Ling Wang ◽  
Lang Cui ◽  
Guang Liu ◽  
...  
Keyword(s):  
Wear Resistance ◽  
Magnesium Alloy ◽  
Abrasive Wear ◽  
Adhesive Wear ◽  
Cold Spraying ◽  
Alloy Coating ◽  
Corrosive Wear ◽  
Fatigue Wear ◽  
Wear Mode ◽  
Wear Modes

NiCoCrAlY coating with high density was prepared on the surface of the magnesium alloy by cold spraying. Compared with the magnesium alloy prepared by the methods of the semi-continuous casting, the wear resistance and wear mode were analyzed by the experiments. The results showed that, under the dry friction condition, the conditions of the weightlessness of wear of NiCoCrAlY coating were better than that of the magnesium alloy. After the frictional experiment for 20 minutes, the weightlessness of wear of NiCoCrAlY coating was 10mg. Compared with that of the magnesium alloy, the weightlessness of wear was lower than 28%. Consequently, the NiCoCrAlY coating had the capacity of the weightlessness of wear resistance. By the comparisons of the every samples friction morphology, the wear modes of the NiCoCrAlY coating were adhesive wear and abrasive wear. And the wear modes of magnesium alloy were also adhesive wear and abrasive wear with corrosive wear and fatigue wear.

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