Dry Sliding Wear Studies of Cu-Based Powder Metallurgy Brake Materials

2012 ◽  
Author(s):  
Glenn K. Gyimah ◽  
Dong Chen ◽  
Ping Huang
Keyword(s):  
Sliding Wear ◽  
Wear Behavior ◽  
Friction Material ◽  
Dry Sliding Wear ◽  
Temperature Sensitive ◽  
Brake Pads ◽  
Different Temperatures ◽  
The Coefficient Of Friction ◽  
Materials Used ◽  
Mechanical And Tribological Characteristics

A novel friction material based on Cu-based powder with several additional elements, such as Al, SiO2, Fe, graphite, Sn, Mn and MoS2, has been developed by PM techniques in order to study the wear to improve mechanical and tribological characteristics of train brake pads. The materials used were sintered at three different temperatures (850°C, 900°C and 950°C). A high pressure pad-on-disc braking tester was developed to test the wear behavior of these materials without lubrication. Wear was measured by microscopic examination of the pad after the tribometer test. The tests showed that the coefficient of friction (COF), wear rate and wear number were improved immensely by high temperature sintering. This shows that the sintering temperature level plays an important role in the performance of the braking material. In addition, the tribological and the mechanical properties were found to be temperature sensitive.

Dry Sliding Wear Studies of Copper-Based Powder Metallurgy Brake Materials

2014 ◽  
Vol 136 (4) ◽  
Author(s):  
Glenn Kwabena Gyimah ◽  
Ping Huang ◽  
Dong Chen
Keyword(s):  
Sintering Temperature ◽  
Wear Behavior ◽  
Friction Material ◽  
Dry Sliding Wear ◽  
Temperature Sensitive ◽  
The Novel ◽  
Different Temperatures ◽  
The Coefficient Of Friction ◽  
Novel Material ◽  
Mechanical And Tribological Characteristics

The paper focuses on a novel friction material on Cu-based powder metal material. Several elements, such as Al, SiO2, Fe, graphite, Sn, Mn, and MoS2 were added to the Cu and were developed by PM techniques. The aim of the experiment was to study the effect of increasing Sintering temperature on mechanical and tribological characteristics of the novel train brake pads. The materials prepared were sintered at three different temperatures (850 °C, 900 °C, and 950 °C). A high pressure pad-on-disk braking tester was developed to test the wear behavior of these materials without lubrication. Wear was measured by microscopic examination of the pad after the tribometer test. The tests showed that the coefficient of friction, wear rate and wear number were improved immensely by high temperature sintering. This means that, the level of the sintering temperature has significant effect on the performance of the braking material. Thereby, the tribological and the mechanical properties of the novel material were found to be temperature sensitive.

scholarly journals High Temperature Tribological Properties of Al2O3/NCD Films Investigated Under Ambient Air Conditions

Coatings ◽  
2020 ◽  
Vol 10 (2) ◽  
pp. 175
Author(s):  
Vitali Podgursky ◽  
Maxim Yashin ◽  
Taivo Jõgiaas ◽  
Mart Viljus ◽  
Asad Alamgir ◽  
...  
Keyword(s):  
Sliding Wear ◽  
Wear Behavior ◽  
Chemical Vapor ◽  
Atomic Layer ◽  
Ambient Air ◽  
Dry Sliding Wear ◽  
Wear Volume ◽  
Al2o3 Layer ◽  
The Coefficient Of Friction ◽  
Short Run

Comparative analysis of dry sliding wear behavior of nanocrystalline diamond (NCD) films and NCD films coated with a thin Al2O3 layer (Al2O3/NCD) is the main goal of the present study. Plasma-enhanced chemical vapor deposition (PECVD) and atomic layer deposition (ALD) methods were used to prepare the NCD and alumina films, respectively. Sliding wear tests were conducted at room temperature (RT), 300 and 450 °C in air. Independent of type of specimen, superlubricating behavior with the coefficient of friction (COF) in the range of 0.004‒0.04 was found for the tests at 300 °C. However, the COF value measured on the Al2O3/NCD films in the tests at 450 °C is lower than that for the NCD film. A relatively short run-in period and a stable COF value of about 0.15 were observed at this temperature for the Al2O3/NCD films. The width of the wear scars measured on the Al2O3/NCD films after the tests at 450 °C is significantly smaller in comparison with the NCD film. The apparent wear volume of the wear scar on the NCD film tested at 450 °C was noticeably higher than that on the Al2O3/NCD films.

Dry sliding wear behavior of MoSi2-Mo5Si3-Mo5SiB2 composite at different temperatures and loads

Wear ◽  
2019 ◽  
Vol 428-429 ◽  
pp. 237-245 ◽  
Author(s):  
Huarong Hu ◽  
Yuanjun Guo ◽  
Jianhui Yan ◽  
Jingwen Qiu ◽  
Yi Wang
Keyword(s):  
Sliding Wear ◽  
Wear Behavior ◽  
Dry Sliding Wear ◽  
Dry Sliding ◽  
Different Temperatures

scholarly journals Sliding Wear Behavior of High-Temperature Vacuum-Brazed WC-Co-NiP Functional Composite Coatings

Materials ◽  
2021 ◽  
Vol 15 (1) ◽  
pp. 88
Author(s):  
Roxana Muntean ◽  
Dragoș-Toader Pascal ◽  
Norbert Kazamer ◽  
Gabriela Mărginean ◽  
Viorel-Aurel Șerban
Keyword(s):  
High Temperature ◽  
Sliding Wear ◽  
Wear Behavior ◽  
Composite Coatings ◽  
Dry Sliding Wear ◽  
Case Hardening ◽  
Functional Coatings ◽  
Wear Rates ◽  
The Coefficient Of Friction ◽  
Case Hardening Steel

The present study aimed to investigate the tribological behavior of high-temperature vacuum-brazed WC-Co-NiP functional coatings deposited on 16MnCr5 case hardening steel. Dry sliding wear resistance was evaluated using a non-conformal ball-on-disk arrangement, at room temperature against 100Cr6 and WC-Co static partners, respectively. Morphological, microstructural, and chemical composition analyses showed a complex, phased structure composed of tungsten carbide, nickel, and hard cobalt-based η-structure. In the testing conditions, the coefficient of friction against 100Cr6 and WC-Co counterparts entered a steady-state value after approximately 1000 m and 400 m, respectively. The wear track analysis revealed phenomena of particles trapped between the sliding bodies, as well as gradual removal of asperities. The calculations of the wear rates proved that the values were strongly influenced by properties of the sliding system, such as crystal structure, stress discontinuities, hardness, and material homogeneity.

Dry sliding wear behavior of Mg2Si/Al composites against automobile friction material

Wear ◽  
2008 ◽  
Vol 264 (7-8) ◽  
pp. 654-661 ◽  
Author(s):  
Q.D. Qin ◽  
Y.G. Zhao ◽  
W. Zhou
Keyword(s):  
Sliding Wear ◽  
Wear Behavior ◽  
Friction Material ◽  
Dry Sliding Wear ◽  
Dry Sliding

Dry sliding wear behavior of aluminum graphene nanoplatelet (GNP) composites

2016 ◽  
Vol 58 (7-8) ◽  
pp. 640-643 ◽  
Author(s):  
Ilyas Istif ◽  
Mehmet Tunc Tuncel
Keyword(s):  
Sliding Wear ◽  
Wear Behavior ◽  
Dry Sliding Wear ◽  
Dry Sliding ◽  
Graphene Nanoplatelet
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