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.

Effect of Fine TiC Particle Reinforcement on the Dry Sliding Wear Behavior of In Situ Synthesized ZA27 Alloy

2018 ◽  
Vol 141 (2) ◽  
Author(s):  
Roshita David ◽  
Rupa Dasgupta ◽  
B. K. Prasad
Keyword(s):  
Wear Rate ◽  
Coefficient Of Friction ◽  
Sliding Wear ◽  
Wear Behavior ◽  
Base Alloy ◽  
Dry Sliding Wear ◽  
Wear Volume ◽  
Dry Sliding ◽  
Material Loss

The in situ method of making zinc-aluminum composites wherein TiC has been introduced has been investigated in the present paper for its microstructural, physical, and dry sliding wear behavior and compared with the base alloy. In the present study, ZA-27 alloy reinforced with 5 and 10 vol % TiC was taken into consideration. The results indicate that the wear rate and coefficient of friction of composites were lower than that of base alloy. The material loss in terms of both wear volume loss and wear rate increases with increase in load and sliding distance, respectively, while coefficient of friction follows a reverse trend with increase in load. Better performance was obtained for 5% TiC reinforcement than with 10% probably due to agglomeration of particles resulting in nonuniform dispersion. Worn surfaces were analyzed by scanning electron microscopy (SEM) analysis.

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 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.

Statistical Modeling and Analysis of Dry Sliding Wear of SiC Reinforced Aluminum MMCs

2013 ◽  
Vol 1 (1) ◽  
pp. 57-70 ◽  
Author(s):  
S. Rajesh ◽  
A. Gopala Krishna ◽  
P. Rama Murthy Raju ◽  
M. Duraiselvam
Keyword(s):  
Taguchi Method ◽  
Sliding Wear ◽  
Wear Behavior ◽  
Matrix Alloy ◽  
Dry Sliding Wear ◽  
Wear Volume ◽  
Dry Sliding ◽  
Modeling And Analysis ◽  
Control Factors ◽  
The Impact

The dry sliding wear behavior of SiC reinforced aluminum alloy composites produced by liquid metallurgy was studied by means of a pin-on-disc type wear set up. Dry sliding wear tests were carried out on SiC reinforced Metal Matrix Composites (MMCs) and its matrix alloy sliding against a steel counterface. Different contact stresses, reinforcement percentages, sliding distances and sliding velocities were selected as control factors and the response selected was Wear Volume Loss (Y1) and Coefficient of Friction (Y2) to evaluate the dry sliding performance. An L25 orthogonal array was employed for the experimental design. Initially empirical relations were deduced for Y1 and Y2 in terms of control factors. Further, the optimal combination of the testing parameters was determined for Y1 and Y2 responses by implementing Taguchi method for the experimental observations. Finally, Analysis of Variance (ANOVA) was performed to know the impact of individual factors on Y1 and Y2. The results indicated that the sliding distance for Y1 and Y2 responses is found to be the most effective factor among the other control parameters on dry sliding wear. The study also shows that the Taguchi method is applicable to solve this type of problem with minimum number of trials compared with a full factorial design.

Dry Sliding Wear Behavior of Graphite Particulate Reinforced Al6061 Alloy Composite Materials

2014 ◽  
Vol 592-594 ◽  
pp. 170-174 ◽  
Author(s):  
Madeva Nagaral ◽  
V. Auradi ◽  
S.A. Kori
Keyword(s):  
Sliding Wear ◽  
Wear Behavior ◽  
Testing Machine ◽  
Matrix Alloy ◽  
Wear Testing ◽  
Dry Sliding Wear ◽  
Wear Volume ◽  
Wear Loss ◽  
Volumetric Wear ◽  
Al6061 Alloy

This present paper is an investigation made to study the un-lubricated sliding wear behavior of Al6061 alloy composites reinforced with graphite particulates of size 100-125 μm. The content of graphite in the alloy was varied from 6-9% in steps of 3 wt. %. The liquid metallurgy technique was used to fabricate the composites. A pin-on-disc wear testing machine was used to evaluate the volumetric wear loss, in which a hardened EN32 steel disc was used as the counter face. The results indicated that the volumetric wear loss of the composites was lesser than that of the Al6061 matrix alloy and it further decreased with the increase in graphite content up-to 6 wt.%. For composites containing 9 wt. % of graphite particulates, the volumetric wear loss was more than that of 6wt. % composites, but lesser than base matrix alloy. However, the material loss in terms of wear volume increased with the increase in load and sliding speed, both in case of composites and the alloy.

Dry sliding wear behavior of infiltrated particulate reinforced Ni/TiC composites

Wear ◽  
2019 ◽  
Vol 426-427 ◽  
pp. 989-995 ◽  
Author(s):  
C.A. León-Patiño ◽  
M. Braulio-Sánchez ◽  
E.A. Aguilar-Reyes ◽  
E. Bedolla-Becerril ◽  
A. Bedolla-Jacuinde
Keyword(s):  
Sliding Wear ◽  
Wear Behavior ◽  
Dry Sliding Wear ◽  
Dry Sliding ◽  
Particulate Reinforced

Dry sliding wear behavior of Al-SiO2composites

2016 ◽  
Vol 23 (6) ◽  
pp. 493-502 ◽  
Author(s):  
Sunil Mohan ◽  
Gaurav Gautam ◽  
Narendra Kumar ◽  
Rakesh Kumar Gautam ◽  
Anita Mohan ◽  
...  
Keyword(s):  
Sliding Wear ◽  
Wear Behavior ◽  
Dry Sliding Wear ◽  
Dry Sliding
Sign in / Sign up

Export Citation Format

Share Document