Review of automotive brake lining materials and their tribological properties

2021 ◽  
pp. 135065012110598
Author(s):  
Mohamed A. Ahdy ◽  
Mohamed Kamal Ahmed Ali ◽  
M. Mourad ◽  
Ali M. Abd-El-Tawwab
Keyword(s):  
Tribological Properties ◽  
Safe Operation ◽  
Friction Modifier ◽  
Advantages And Disadvantages ◽  
Recent Developments ◽  
Analysis Of Results ◽  
Review Study ◽  
Brake Performance ◽  
Brake Lining ◽  
Automotive Brake

Brake lining material properties are considered an essential aspect of the safe operation of vehicles. The presented paper aims to present a comprehensive review of brake lining materials and their tribological properties including the proposed materials, their advantages and disadvantages, analysis of results, and test rig experiments. The first section of the paper includes brief information on brake lining materials, friction modifier additives, and recent developments in friction additives. The second section discusses the tribological performance of brake lining materials. Furthermore, the key mechanisms of the friction layer produced on the worn brake lining surface have been explained microscopically (HRTEM). Part of this review is devoted to demonstrating current research gaps and challenges related to brake performance in automotive for further research. In brief, this review study is highly significant, as it provides more detailed information regarding the performance of brake lining materials.

scholarly journals A Study Wireless Communication Domain

2011 ◽  
pp. 82-86
Author(s):  
Sangram Routray ◽  
Lalit M. Satapathy ◽  
Sanjib k. Nayak
Keyword(s):  
Wireless Communication ◽  
Embedded Systems ◽  
Short Range ◽  
Remote Access ◽  
Wireless Technologies ◽  
Advantages And Disadvantages ◽  
Recent Developments

Wireless communication seem destined to make a large and continuing impact on our lives. Recent developments in wireless technologies provide a new channel for implementation of embedded systems with remote access for mobile and non-mobile products and services. Several wireless technologies are available with their own advantages and disadvantages. This paper examines several available short-range wireless technologies and evaluates them for embedded systems.

Influence of copper on automotive brake performance

Wear ◽  
2019 ◽  
Vol 426-427 ◽  
pp. 741-749 ◽  
Author(s):  
L.Y. Barros ◽  
J.C. Poletto ◽  
P.D. Neis ◽  
N.F. Ferreira ◽  
C.H.S. Pereira
Keyword(s):  
Brake Performance ◽  
Automotive Brake

scholarly journals Electrodeposited Biocoatings, Their Properties and Fabrication Technologies: A Review

Coatings ◽  
2020 ◽  
Vol 10 (8) ◽  
pp. 782
Author(s):  
Andrzej Zielinski ◽  
Michal Bartmanski
Keyword(s):  
Electrophoretic Deposition ◽  
Calcium Ions ◽  
Electrolyte Composition ◽  
Cathodic Deposition ◽  
Properties Of Coatings ◽  
Cathodic Electrodeposition ◽  
Advantages And Disadvantages ◽  
Electrodeposited Coatings ◽  
Recent Developments ◽  
State Of Art

Coatings deposited under an electric field are applied for the surface modification of biomaterials. This review is aimed to characterize the state-of-art in this area with an emphasis on the advantages and disadvantages of used methods, process determinants, and properties of coatings. Over 170 articles, published mainly during the last ten years, were chosen, and reviewed as the most representative. The most recent developments of metallic, ceramic, polymer, and composite electrodeposited coatings are described focusing on their microstructure and properties. The direct cathodic electrodeposition, pulse cathodic deposition, electrophoretic deposition, plasma electrochemical oxidation in electrolytes rich in phosphates and calcium ions, electro-spark, and electro-discharge methods are characterized. The effects of electrolyte composition, potential and current, pH, and temperature are discussed. The review demonstrates that the most popular are direct and pulse cathodic electrodeposition and electrophoretic deposition. The research is mainly aimed to introduce new coatings rather than to investigate the effects of process parameters on the properties of deposits. So far tests aim to enhance bioactivity, mechanical strength and adhesion, antibacterial efficiency, and to a lesser extent the corrosion resistance.

Critical Comparison of Structured Contactors for Adsorption-Based Gas Separations

2018 ◽  
Vol 9 (1) ◽  
pp. 129-152 ◽  
Author(s):  
Stephen J.A. DeWitt ◽  
Anshuman Sinha ◽  
Jayashree Kalyanaraman ◽  
Fengyi Zhang ◽  
Matthew J. Realff ◽  
...  
Keyword(s):  
State Of The Art ◽  
System Modeling ◽  
Fixed Bed ◽  
Gas Separations ◽  
Science And Engineering ◽  
Advantages And Disadvantages ◽  
Substantial Problem ◽  
Temperature Swing ◽  
Recent Developments ◽  
Temperature Swing Adsorption

Recent advances in adsorptive gas separations have focused on the development of porous materials with high operating capacity and selectivity, useful parameters that provide early guidance during the development of new materials. Although this material-focused work is necessary to advance the state of the art in adsorption science and engineering, a substantial problem remains: how to integrate these materials into a fixed bed to efficiently utilize the separation. Structured sorbent contactors can help manage kinetic and engineering factors associated with the separation, including pressure drop, sorption enthalpy effects, and external heat integration (for temperature swing adsorption, or TSA). In this review, we discuss monoliths and fiber sorbents as the two main classes of structured sorbent contactors; recent developments in their manufacture; advantages and disadvantages of each structure relative to each other and to pellet packed beds; recent developments in system modeling; and finally, critical needs in this area of research.

Evaluation of the properties of polymer composites with carbon nanotubes in the aspect of their abrasive wear

2019 ◽  
Vol 1 (95) ◽  
pp. 5-12 ◽  
Author(s):  
A. Krzyżak ◽  
E. Kosicka ◽  
R. Szczepaniak ◽  
T. Szymczak
Keyword(s):  
Carbon Nanotubes ◽  
Composite Materials ◽  
Bisphenol A ◽  
Abrasive Wear ◽  
Polymer Composites ◽  
Tribological Properties ◽  
Polymer Matrix Composites ◽  
Matrix Composites ◽  
Friction Modifier ◽  
The Impact

Purpose: Carbon nanotubes are used in composite materials due to the improvement of (including tribological) properties of composites, especially thermoplastic matrix composites. This demonstrates the potential of CNTs and the validity of research on determining the impact of this type of reinforcement on the composite materials under development. Design/methodology/approach: The article presents selected results of research on polymer composites made of C.E.S. R70 resin, C.E.S. H72 hardener with the addition of a physical friction modifier (CNTs) with a percentage by volume of 18.16% and 24.42%, respectively, which also acts as a reinforcement. The produced material was subjected to hardness measurements according to the Shore method and EDS analysis. The study of abrasive wear in reciprocating movement was carried out using the Taber Linear Abraser model 5750 tribotester and a precision weight. The surface topography of the composite material after tribological tests was determined using scanning electron microscopy (SEM). Some of the mentioned tests were carried out on samples made only of resin, used as the matrix of the tested polymer composite. Findings: Carbon nanotubes used in polymer matrix composites, including bisphenol A/F epoxy resin have an influence on the tribological properties of the material. The addition of carbon nanotubes contributed to a 24% increase in the Ra parameter relative to pure resin, to a level corresponding to rough grinding of steel. Research limitations/implications: The results of the tests indicate the need to continue research in order to optimize the composition of composites in terms of operating parameters of friction nodes in broadly understood aviation. Originality/value: The analysed literature did not find any studies on the impact of the addition of carbon nanotubes on epoxy resins based on bisphenol A/F. Due to the wide scope of application of such resins, the properties of such composite materials in which carbon nanotubes are the reinforcing phase have been investigated.

Blackout 2014 Exercise – Prague, the Capital of the Czech Republic

2015 ◽  
Vol 10 (2) ◽  
pp. 270-275 ◽  
Author(s):  
Tomas Hudecek ◽  
◽  
Josef Juránek ◽  
Jaroslav Pejcoch ◽  
◽  
...  
Keyword(s):  
Information Technology ◽  
Czech Republic ◽  
City Management ◽  
The Czech Republic ◽  
Advantages And Disadvantages ◽  
Rule Of Life ◽  
Analysis Of Results ◽  
Potential Damage ◽  
Over Time

As our world becomes increasingly complex over time, we are using increasingly sophisticated tools to be fed and entertained. This increasing complexity has both advantages and disadvantages. Our dependence on electric power is almost absolute and a long-term blackout could become potentially fatal to any region or country hit by it. It has been a rule of life that the intensive preparation to some crisis begins not sooner than after it strikes and causes a big damage. Prague city management did not want to wait to find out, however, and organized an exercise to understand just what such a situation might look like and just how well prepared the capital of the Czech Republic was to manage it. The exercise was designed, run and documented by up-to-date information technology, enabling further study and analysis of results to improve the city’s resilience and to prepare adequate means for mitigating potential damage.

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