CALCULATION OF THE GROWTH/WEAR KINETICS OF A SOLID LUBRICANT FILM IN A THRUST PLAIN BEARING

2021 ◽  
Vol 56 (6) ◽  
pp. 1020-1027
Author(s):  
I. A. Soldatenkov
Keyword(s):  
Solid Lubricant ◽  
Lubricant Film ◽  
Plain Bearing ◽  
Kinetics Of

Tribological characteristics of MoS2–Nb solid lubricant film in different tribo-test conditions

2008 ◽  
Vol 203 (5-7) ◽  
pp. 766-770 ◽  
Author(s):  
Ihsan Efeoglu ◽  
Özlem Baran ◽  
Fatih Yetim ◽  
Sabri Altıntaş
Keyword(s):  
Solid Lubricant ◽  
Lubricant Film ◽  
Tribological Characteristics ◽  
Test Conditions

108 Effect of solid lubricant film on fretting fatigue characteristic of aluminum alloy (JIS A7N01)

2008 ◽  
Vol 2008.57 (0) ◽  
pp. 15-16
Author(s):  
Tomohisa NISHIDA ◽  
Junnosuke MIZUTANI ◽  
Masahiko Satoh ◽  
Yoshiharu MUTOH ◽  
Masahiro KAWAMURA ◽  
...  
Keyword(s):  
Aluminum Alloy ◽  
Solid Lubricant ◽  
Fretting Fatigue ◽  
Lubricant Film ◽  
Fatigue Characteristic

Thermal Stress Analysis of Lubricating Wear-Resisting Coating Prepared by Supersonic Plasma Spraying in the High-Heat Tribological Process

2011 ◽  
Vol 80-81 ◽  
pp. 667-672
Author(s):  
Yun Cai Zhao ◽  
Gao Jie Hao ◽  
Chun Ming Deng ◽  
Wem You Ma
Keyword(s):  
Thermal Stress ◽  
Friction Coefficient ◽  
Wear Rate ◽  
Plasma Spraying ◽  
Direct Contact ◽  
Solid Lubricant ◽  
High Heat ◽  
Process Research ◽  
Lubricant Film ◽  
Supersonic Plasma

This paper is about the study of the KF301/WS2 composite lubricating wear-resisting coatings prepared by supersonic plasma spraying. Basing on the research of the tribological characteristics, it has been discussed that the thermal stress of lubricating wear-resisting coating prepared by supersonic plasma spraying in the high-heat tribological process. Research shows that the wear rate of the coating increases with the increase of the temperature. At 300°C, the wear rate is 1.02×10-4mg/m; At 750°C, the wear rate is 2.61×10-4 mg/m. With the increase of temperature, friction coefficient of the coatings shows gradually increasing. When the temperature falls below 600°C, friction coefficient keeps around 0.08; At 750°C, the friction coefficient is 0.12. The thermal stress σ1max mainly is controlled by temperature, with the increase of temperature, the warping phenomena of solid lubricant film and the combined effects of heat stress and friction contact stress, which causes the insecure combination of the lubricant film and substrate, lubricant film’s warp, break, local direct contact between the metals, which is one of reasons to lead to decrease of the tribological properties of self-lubricating composite coating.

Oxidation Kinetics of Self-Lubricating Ti-48%Al-2%Nb-2%Cr-x%CaF2 Composites

2011 ◽  
Vol 121-126 ◽  
pp. 288-292
Author(s):  
Li Ying Yang ◽  
Shou Ren Wang ◽  
Ying Zi Wang ◽  
Ru Ma ◽  
Yong Wang
Keyword(s):  
Oxidation Resistance ◽  
Oxidation Kinetics ◽  
Solid Lubricant ◽  
Important Influence ◽  
Rate Law ◽  
Parabolic Rate ◽  
Kinetics Of

The Oxidation kinetics of Ti-48Al-2Nb-2Cr composites (TANC) with addition of different weight contents of CaF2 solid lubricant was evaluated. It is indicated that oxidation dynamic curve follow quasi-parabolic rate law under 800 °C. Once the temperature exceed 1100 °C, the oxidation dynamic curve seems to do not follow quasi-parabolic rate law. The contents of solid lubricant in TANC matrix occur an important influence for oxidation resistance

Lubrication in Tight Spots

2019 ◽  
pp. 301-347
Author(s):  
C. Mathew Mate ◽  
Robert W. Carpick
Keyword(s):  
Shear Strength ◽  
Boundary Lubrication ◽  
Layered Structure ◽  
Capillary Condensation ◽  
Lubricant Film ◽  
Solid Surfaces ◽  
Cold Welding ◽  
Boundary Lubricant ◽  
Disjoining Pressures ◽  
Kinetics Of

This chapter discusses the interesting phenomena that happen when the thickness of a lubricant film is reduced to nanoscale dimensions. For liquid lubricants sandwiched between two solid surfaces, the interesting phenomena associated with confined liquids include: molecules forming a layered structure, enhanced viscosity, and solidification. In boundary lubrication, an adsorbed monolayer resists penetration of contacting asperities and sliding takes place over the low shear strength surface of the boundary lubricant. The absence of boundary lubrication can lead to cold welding where adhesion at the interface leads to ultra-high friction and seizure. The last part of this chapter discusses how capillary and disjoining pressures lead to the formation of lubricant menisci around contacting asperities from a thin lubricant film on one of the surfaces and how these menisci influence adhesion and friction. The kinetics of meniscus formation from capillary condensation and its impact on friction are also discussed.

Estimation of Contact Interface between Tool and Workpiece in Cold Forming Using FEM Analysis

2007 ◽  
Vol 539-543 ◽  
pp. 2275-2280
Author(s):  
Hiroyuki Saiki ◽  
Yasuo Marumo ◽  
Li Qun Ruan ◽  
Junpei Kozasa
Keyword(s):  
Flow Stress ◽  
Friction Coefficient ◽  
Solid Lubricant ◽  
Fem Analysis ◽  
Lubricant Film ◽  
Cold Forging ◽  
Contact Interface ◽  
Rigid Plastic ◽  
Cold Forming ◽  
Minimum Film Thickness

The effect of the flow stress of solid lubricant for cold forging on the tribological conditions was investigated using a rigid-plastic finite element method. The thickness of lubricant film decreases with decreasing flow stress of the solid lubricant and then decreases rapidly. The apparent friction coefficient also decreases with the decrease in the flow stress of the solid lubricant. The thickness of lubricant film tends to decrease with decreasing friction shear factor. When flow stress of solid lubricant is low, the thickness of lubricant film decreases remarkably with increasing tool stroke. We can observe a good correlation between the flow stress of solid lubricant, friction shear factor, minimum film thickness and apparent friction coefficient.

Sintering Kinetics of Self-Lubricating Ti-48%Al-2%Nb-2%Cr Alloys with Fluoride Lubricants

2011 ◽  
Vol 295-297 ◽  
pp. 432-435 ◽  
Author(s):  
Li Ying Yang ◽  
Shou Ren Wang ◽  
Bo Zhu ◽  
Lin Hou
Keyword(s):  
Solid Lubricant ◽  
Sintering Temperature ◽  
Solid Lubricants ◽  
Sintering Kinetics ◽  
Kinetics Of ◽  
Addition Amount ◽  
Time Decrease

The study reports the sintering kinetics of Ti–48Al–2Nb-2Cr composites (TANC) with addition of different weight contents of LiF, NaF,CaF2and 38%CaF2-62%BaF2eutectic solid lubricant (BC) using OM, SEM and DSC. The microstructure of TANC composites with different CaF2and BC content is analyzed. Additions of solid lubricants to TANC matrix have significant influences on densification degree of the composites. Densities increase with sintering temperature and time, decrease with addition amount of solid lubricant.

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