Wear Behavior of Flat and Graded Profile Boron-Implanted Beryllium

1983 ◽  
Vol 27 ◽  
Author(s):  
K. Kumar ◽  
H. Newborn ◽  
R. Kant
Keyword(s):  
Heat Treatment ◽  
Wear Resistance ◽  
Electron Spectroscopy ◽  
Auger Electron ◽  
Friction And Wear ◽  
Boron Concentration ◽  
Wear Behavior ◽  
Friction And Wear Behavior ◽  
Flat Profile ◽  
Pin On Disk

ABSTRACTPin-on-disk tests were performed for comparative friction and wear behavior on flat and graded profile boron implanted beryllium samples. Peak, intended boron concentrations of 10, 20, 30 and 40 atom percent were investigated. Auger Electron Spectroscopy was used to determine the boron concentration as a function of depth. Preliminary work was performed to study the effects of (1) a low temperature (450°C, 1–1/2 hours) heat treatment of the implanted specimens and (2) a change in the pin material. All of the boron implanted beryllium samples showed significant improvement versus unimplanted beryllium and an anodized beryllium surface. Graded samples showed comparable friction coefficients but inferior wear resistance with respect to the flat profile samples.

HIGH-TEMPERATURE FRICTION AND WEAR BEHAVIOR OF A NI-BASED VALVE ALLOY

2019 ◽  
Vol 26 (10) ◽  
pp. 1950074
Author(s):  
ZHI-YUAN ZHU ◽  
JIA-HUAN CHEN ◽  
YUAN-FEI CAI ◽  
JIAN-QIANG LI
Keyword(s):  
Heat Treatment ◽  
Wear Resistance ◽  
High Temperature ◽  
Wear Rate ◽  
Friction And Wear ◽  
Room Temperature ◽  
Wear Behavior ◽  
Friction And Wear Behavior ◽  
Nickel Based Superalloy ◽  
Heat Treated

This study explored the friction and wear behavior of a Ni-based exhaust valve at high temperatures. Nickel-based superalloy was used with two types of processing states: the original forged sample and the sample under the standard T1 heat treatment. At room temperature and a loading force of 10[Formula: see text]N, the average friction coefficient of the T1 heat-treated specimen is 0.61, which was lower than that of the forged sample (0.78). The wear rate of this specimen was also lower than that of the forged sample at the same temperature and loading force. Thus, T1 heat treatment can significantly improve the wear resistance of the alloy because of [Formula: see text] phase and carbides. The wear rate was the minimum at 550∘C and increased again at 750∘C dominated by the formation and flake-off of the oxide film.

scholarly journals Friction and Wear Behavior of Polyimide Composites Reinforced by Surface-Modified Poly-p-Phenylenebenzobisoxazole (PBO) Fibers in High Ambient Temperatures

Polymers ◽  
2019 ◽  
Vol 11 (11) ◽  
pp. 1805
Author(s):  
Yu ◽  
Zhang ◽  
Tang ◽  
Gao
Keyword(s):  
Wear Resistance ◽  
Friction Coefficient ◽  
Wear Rate ◽  
Friction And Wear ◽  
Wear Behavior ◽  
Specific Wear Rate ◽  
Interface Properties ◽  
Sliding Velocity ◽  
Friction And Wear Behavior ◽  
Ambient Temperatures

(1) In order to improve the properties of antifriction and wear resistance of polyimide (PI) composite under high temperature conditions, (2) 3-Aminopropyltriethoxysilane (APTES) and Lanthanum (La) salt modifications were employed to manufacture poly-p-phenylenebenzobisoxazole (PBO)/PI composites with different interface properties. The representative ambient temperatures of 130 and 260 °C were chosen to study the friction and wear behavior of composites with different interface properties. (3) Results revealed that while both modification methods can improve the chemical activity of the surface of PBO fibers, the La salt modification is more effective. The friction coefficient of all composites decreases with the increase of sliding velocity and load at two temperatures, and the specific wear rate is increases. Contrary to the situation in the 130 °C environment, the wear resistance of the unmodified composite in the 260 °C environment is greatly affected by the sliding velocity and load, while the modified composites are less affected. Under the same test parameters, the PBO–La/PI composite has the lowest specific wear rate and friction coefficient, and (4) La salt modification is a more effective approach to improve the properties of antifriction and wear resistance of PI composite than APTES modification in high ambient temperatures.

Friction and Wear Behavior of Boronized Chromium for Biological Applications

2005 ◽  
Author(s):  
R. Ribeiro ◽  
S. Ingole ◽  
O. Juan ◽  
H. Liang ◽  
M. Usta ◽  
...  
Keyword(s):  
Wear Resistance ◽  
Surface Characterization ◽  
Friction And Wear ◽  
Wear Behavior ◽  
Work Piece ◽  
X Ray Diffraction ◽  
Friction And Wear Behavior ◽  
Pin On Disc ◽  
Dry Conditions ◽  
Wear Mode

Enhanced corrosion and wear resistance are crucially important to prolong the service life of biomaterials. Boronizing has been reported to enhance the wear resistance of pure chromium. In this research, we investigate friction and wear behavior of boronized chromium. Pin-on-disc tribometer was used to conduct the wear and friction tests. Experiments were conducted in dry conditions as well as in simulated body fluid (SBF). Fundamental aspects of wear mode and lubrication behavior were studied using surface characterization techniques such as TEM, and X-ray diffraction. Results showed evidence of tribo-chemical interactions between SBF and work piece materials.

Effect of Humidity on the Friction and Wear Properties of Sn

1995 ◽  
Vol 117 (4) ◽  
pp. 737-741 ◽  
Author(s):  
Y. Imada ◽  
K. Nakajima
Keyword(s):  
Relative Humidity ◽  
Friction And Wear ◽  
Wear Behavior ◽  
Disk Surface ◽  
Wear Loss ◽  
Wear Properties ◽  
Friction And Wear Behavior ◽  
Low Humidity ◽  
Friction And Wear Properties ◽  
Pin On Disk

Variation in friction and wear properties with relative humidity was obtained with an Sn pin sample on a Cu disk at a constant speed (0.4 m/s), load (6.4 N), and sliding distance (5 km), using a pin-on-disk apparatus. The influence of atmosphere on the tribological properties was investigated, including moisture ranging from 4% to 95 percent relative humidity (RH). It was found that the wear loss of the pin sample is very large at low humidity of around 5 percent RH, but it decreases and reaches saturation at about 50 percent RH. Factors characterizing the friction and wear at 50 percent RH were examined along with surface analysis of the disk. The results showed that the extensive transfer of Sn from pin to disk occurs during sliding and that the friction and wear behavior is determined by the friction and wear of an Sn sliding on Sn. An examination was carried out with an Sn pin sample on a stainless steel disk in comparison with an Sn-Cu couple. It was concluded that the friction and wear behavior is determined by the properties of the film transferred to the disk surface.

Effect of Micro-Addition Rare Earth and Chrome on Friction and Wear Behavior of Boronized Layer

2005 ◽  
Vol 297-300 ◽  
pp. 1401-1405 ◽  
Author(s):  
Bin Xu ◽  
Shu Hua Wang ◽  
Yu Peng Lu ◽  
Jianjun Cui ◽  
Mu Sen Li
Keyword(s):  
Wear Resistance ◽  
Rare Earth ◽  
Service Life ◽  
Friction And Wear ◽  
Wear Behavior ◽  
Wear Test ◽  
High Hardness ◽  
Test Machine ◽  
Friction And Wear Behavior ◽  
Fe2b Phase

Application of powder boronizing to mechanical industry has been restricted because of the brittleness of boronized layer, which inevitably leads to decrease of service life of boronized parts. Therefore, attention should be paid to reducing the brittleness of boronized layer without decreasing its high hardness. In the present paper, a study on the effect of micro-addition rare earth and chrome on friction and wear behavior of boronized layer was carried out using an MM-200 wear test machine. Compared with that of pure single Fe2B phase, the brittleness of the boronized layer containing minim rare earth and chrome elements, obtained by powder RE-chrome-boronizing, is reduced, which results in increasing the bearing capacity and wear resistance of the boronized layer. The friction and wear mechanism is also briefly analyzed.

Friction and Wear Performance of Epoxy Resin Reinforced With Boron Nitride Nanoplatelets

2017 ◽  
Vol 140 (2) ◽  
Author(s):  
Mürsel Ekrem ◽  
Hayrettin Düzcükoğlu ◽  
Muhammet Ali Şenyurt ◽  
Ömer Sinan Şahin ◽  
Ahmet Avcı
Keyword(s):  
Mechanical Properties ◽  
Heat Conduction ◽  
Boron Nitride ◽  
Epoxy Resin ◽  
Friction And Wear ◽  
Wear Behavior ◽  
Wear Performance ◽  
Friction And Wear Behavior ◽  
Pin On Disk ◽  
Disk Test

In this study, the effects of addition of boron nitride nanoplatelets (BNNPs) upon friction and wear behavior of epoxy resin have been investigated by using pin-on-disk test. It has been reported in the literature that certain amounts of BNNP addition can be useful for enhancement of mechanical properties. Therefore, it is very important to obtain the effect of such addition upon friction and wear performance of epoxy resin. BNNPs have been incorporated at 0.3–0.5–0.7–1 wt %. It is shown that BNNP addition results in decrease in friction coefficient and wear. It is also shown that the best results are obtained with 0.5% nanoplatelet addition. It is also observed that heat conduction of epoxy resin is enhanced by the nanoplatelet addition.

Designing a Bioinspired Surface for Improved Wear Resistance and Friction Reduction

2021 ◽  
pp. 1-19
Author(s):  
Julia Hoskins ◽  
Min Zou
Keyword(s):  
Wear Resistance ◽  
Surface Texture ◽  
Friction And Wear ◽  
Wear Track ◽  
Wear Behavior ◽  
Friction Reduction ◽  
Loading Conditions ◽  
Track Width ◽  
Friction And Wear Behavior ◽  
Average Wear

Abstract This study used 2-photon 3D lithographic printing and replica molding to fabricate a micro-texture based on the Ocellated Skink. The fabricated surface texture was studied for friction and wear behavior using linear reciprocating tribological tests with a chrome steel ball counterface under various loading conditions and compared to samples fabricated with the same methods without a surface texture. The texture was found to decrease friction at low loads and provide steady friction under all loading conditions. The textured samples also decreased the average wear track width up to 61%. Wear was reduced on surfaces by the texture through the controlled formation of microcracking, which both reduced the amount of debris built up on samples and effectively reduced the worn area.

The Research on the Friction and Wear Behavior of FKM/NBR Blends under Water Lubrication

2013 ◽  
Vol 750-752 ◽  
pp. 2150-2155 ◽  
Author(s):  
Yu Zeng Zhang ◽  
Ming Yin Yan ◽  
Shi Jie Wang ◽  
Xiao Ren Lv
Keyword(s):  
Wear Resistance ◽  
Friction And Wear ◽  
Wear Behavior ◽  
Frictional Coefficient ◽  
Water Lubrication ◽  
Wear Loss ◽  
Fatigue Wear ◽  
Screw Pump ◽  
Friction And Wear Behavior ◽  
Working Parameters

In this paper, the friction and wear behavior of FKM, NBR and FKM/NBR blends with the same Shore hardness was investigated in the MPV - 600 wear tester under water lubrication based on the actual working parameters of the screw pump. Wear mechanism of FKM/NBR blends with different load was also analyzed according to their wear loss and frictional coefficient. The results showed that the wear resistance of NBR was improved by the addition FKM. FKM/NBR blend with ratio of 2:8 owned the optimal wear resistance, which was close to that of FKM. The wear of FKM and FKM/NBR blend with ratio of 2:8 was controlled by fatigue wear, and the others were mainly controlled by abrasive wear.

Research on Techniques of Electro Less Nickel Plating Nano-C60 Crystals on the Surface of Micromechanical Devices by Laser-Induced Way

2011 ◽  
Vol 308-310 ◽  
pp. 837-842
Author(s):  
Liang Zhong ◽  
Li Hou ◽  
Chuan Hui Liu ◽  
Qin Ying
Keyword(s):  
Wear Resistance ◽  
Composite Coating ◽  
Friction And Wear ◽  
Wear Behavior ◽  
Nickel Plating ◽  
Friction And Wear Behavior ◽  
Surface Metallization ◽  
Micromechanical Device ◽  
Micromechanical Devices

In order to improve the dispersion performance of nano-C60 crystals, the surface metallization was achieved by electro less nickel plating; By the laser-induced way, a new composite coating was got on a micromechanical device, which contained some metalized nano-C60 crystals. Research on the fretting friction and wear behavior of the composite coating, its ability of Wear Resistance were improved evidently.

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