scholarly journals The Role of Solid Lubricants for Brake Friction Materials

Lubricants ◽  
2016 ◽  
Vol 4 (1) ◽  
pp. 5 ◽  
Author(s):  
Werner Österle ◽  
Andrey Dmitriev
Keyword(s):  
Solid Lubricants ◽  
Friction Materials

The role of scorching treatment on the wear and emission behavior of friction materials with and without copper

Wear ◽  
2020 ◽  
Vol 460-461 ◽  
pp. 203480 ◽  
Author(s):  
Ana Paula Gomes Nogueira ◽  
Paolo Bagolan ◽  
Mara Leonardi ◽  
Stefano Gialanella ◽  
Giovanni Straffelini
Keyword(s):  
Friction Materials ◽  
Emission Behavior

scholarly journals Understanding the Unique Role of Phospholipids in the Lubrication of Natural Joints: An Interfacial Tension Study

Coatings ◽  
2019 ◽  
Vol 9 (4) ◽  
pp. 264 ◽  
Author(s):  
Aneta D. Petelska ◽  
Katarzyna Kazimierska-Drobny ◽  
Katarzyna Janicka ◽  
Tomasz Majewski ◽  
Wiesław Urbaniak
Keyword(s):  
Interfacial Tension ◽  
Lipid Bilayers ◽  
Solid Lubricant ◽  
Solid Lubricants ◽  
Phospholipid Bilayer ◽  
Low Friction ◽  
Unique Role ◽  
Lamellar Phases ◽  
Chemical Inertness

Some solid lubricants are characterized by a layered structure with weak (van der Waals) inter-interlayer forces which allow for easy, low-strength shearing. Solid lubricants in natural lubrication are characterized by phospholipid bilayers in the articular joints and phospholipid lamellar phases in synovial fluid. The influence of the acid–base properties of the phospholipid bilayer on the wettability and properties of the surface have been explained by studying the interfacial tension of spherical lipid bilayers based on a model membrane. In this paper, we show that the phospholipid multi-bilayer can act as an effective solid lubricant in every aspect, ranging from a ‘corrosion inhibitor’ in the stomach to a load-bearing lubricant in bovine joints. We present evidence of the outstanding performance of phospholipids and argue that this is due to their chemical inertness and hydrophilic–hydrophobic structure, which makes them amphoteric and provides them with the ability to form lamellar structures that can facilitate functional sliding. Moreover, the friction coefficient can significantly change for a given phospholipid bilayer so it leads to a lamellar-repulsive mechanism under highly charged conditions. After this, it is quickly transformed to result in stable low-friction conditions.

Role of constituents of friction materials on their sliding behavior between room temperature and 400 °C

2015 ◽  
Vol 65 ◽  
pp. 179-186 ◽  
Author(s):  
Fatima Eddoumy ◽  
Haytam Kasem ◽  
Houcine Dhieb ◽  
Josephus Gerardus Buijnsters ◽  
Philippe Dufrenoy ◽  
...  
Keyword(s):  
Room Temperature ◽  
Friction Materials

Role of Al2O3 in Semi-Metallic Friction Materials and its Effects on Friction and Wear Performance

2008 ◽  
Vol 51 (6) ◽  
pp. 771-778 ◽  
Author(s):  
Yanli Fan ◽  
Vlastimil Matějka ◽  
Gabriela Kratošová ◽  
Yafei Lu
Keyword(s):  
Friction And Wear ◽  
Wear Performance ◽  
Friction Materials ◽  
Metallic Friction

Carbon solid lubricants: role of different dimensions

2020 ◽  
Vol 107 (9-10) ◽  
pp. 3875-3895 ◽  
Author(s):  
Shiwen Wu ◽  
Siyu Tian ◽  
Pradeep L. Menezes ◽  
Guoping Xiong
Keyword(s):  
Solid Lubricants ◽  
Different Dimensions

The Role of Copper on the Friction and Wear Performance of Automotive Brake Friction Materials

2011 ◽  
Vol 5 (1) ◽  
pp. 9-18 ◽  
Author(s):  
Seong Jin Kim ◽  
Jae Young Lee ◽  
Jai Min Han ◽  
Yoon Cheol Kim ◽  
Hyun Dal Park ◽  
...  
Keyword(s):  
Friction And Wear ◽  
Wear Performance ◽  
Friction Materials ◽  
Automotive Brake

Relationship Between Wear Performance and Solid Lubricants in Sintered Friction Materials

2005 ◽  
Author(s):  
T. Miyauchi ◽  
A. J. Day ◽  
C. S. Wright
Keyword(s):  
High Speed ◽  
Solid Lubricants ◽  
Friction Material ◽  
Area Fraction ◽  
Cast Irons ◽  
Wear Performance ◽  
Friction Materials ◽  
Temperature Performance ◽  
High Speed Trains ◽  
Pad Wear

Cast iron (FC and NCM) and forged steel (ST) discs, and four types of sintered friction material pads have been employed in the braking systems of Japanese high-speed trains. These sintered friction materials have complex microstructures. This paper reports result of an investigation to establish correlations between friction, wear and temperature characateristics of the disc–pad friction pairs and pad microstructure. A scale friction rig was used to examine friction, wear and temperature performance of the selected brake friction pairs. Area fraction of lubricants in the sintered friction materials was, depending on formulation, in the range 30–47%. It was found that increasing the lubricant area fraction up to 40%, was effective in reducing pad wear. Above 40% lubricant, wear rate either remained constant or increased slightly to decrease pad wear. For FC discs wear was a minimum at 40% lubricant whilst wear drecreased with increasing overall lubricant content for NCM discs and wear was unaffected by variation in lubricant content for the ST discs. The harder ST forged steel discs exhibited less wear than the softer FC and NCM cast irons.

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