A Mechanism Design of Friction and Wear Test Based on Liquid Medium

2013 ◽  
Vol 703 ◽  
pp. 212-216
Author(s):  
Wei Wu Zhao ◽  
Xiang Yu ◽  
Zhi Hang Luo ◽  
Jie Ai ◽  
Xi An Zhao
Keyword(s):  
Liquid Medium ◽  
Friction And Wear ◽  
Wear Behavior ◽  
Wear Test ◽  
In Situ Observation ◽  
Wear Properties ◽  
Properties Of Materials ◽  
Friction And Wear Properties ◽  
Ball On Disc

Friction and wear tester is an important device for detecting friction and wear properties of materials. There is inadequacy of research on friction and wear behavior of geological drilling mechanisms serving under complicated liquid circumstances like water, oil and mortar. This article describes an accessory mechanism for commonly used ball-on-disc tribometer which can be applicable in liquid medium. A new oil cup is designed and composed of oil cup sleeve, oil cup lid, transition station, worktable and etc. Interference connection is adopted between oil cup and rotary test bench of tester. Materials are chosen so as to meet requirement from actual working conditions and to simulate the friction and wear test in liquid medium. The mechanism designed share characters of convenient operation, in-situ observation and friendly environment.

Effect of Varying Wt% of TiC on Mechanical and Wear Properties of RZ5-TiC In-Situ Composite

2018 ◽  
Vol 8 (2) ◽  
pp. 45-56 ◽  
Author(s):  
Deepak Mehra ◽  
M.M. Mahapatra ◽  
S. P. Harsha
Keyword(s):  
Wear Resistance ◽  
Wear Behavior ◽  
Wear Test ◽  
X Ray Diffraction ◽  
Wear Properties ◽  
X Ray ◽  
Tic Particle ◽  
Mechanical And Microstructural Properties ◽  
Sliding Distance

The purpose of this article is to enhance the mechanical properties and wear resistance of the RZ5 alloy used in the aerospace application by adding TiC particles. The present study discusses processing of in-situ RZ5-TiC composite fabricated by self-propagating high temperature (S.H.S.) method and its wear behavior. The effects of TiC particle on mechanical and microstructural properties of the composite are studied. The wear test is performed by varying the sliding distance and applied load. The composite is characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) and energy dispersive X-ray spectroscopy (EDS). The results exhibited the properties like strength and hardness of RZ5-10wt%TiC composite has been increased considerably, while grain size is decreased as compared to the RZ5 alloy. The fractography indicated mixed mode (quasi-cleavage and ductile feature) failure of the composites. The wear results showed improvement in wear resistance of the composite. The FESEM showed dominate wear mechanisms are abrasion, ploughing grooves.

Microstructure and Wear Properties of In Situ TiC-Cr7C3/Fe Surface Composite

2011 ◽  
Vol 415-417 ◽  
pp. 170-173
Author(s):  
Jing Wang ◽  
Si Jing Fu ◽  
Yi Chao Ding ◽  
Yi San Wang
Keyword(s):  
Sliding Wear ◽  
Wear Behavior ◽  
Wear Test ◽  
Dry Sliding Wear ◽  
Dry Sliding ◽  
Test Machine ◽  
Wear Properties ◽  
Surface Composite ◽  
The Matrix

A wear resistant TiC-Cr7C3/Fe surface composite was produced by cast technique and in-situ synthesis technique. The microstructure and dry-sliding wear behavior of the surface composite was investigated using scanning electron microscope(SEM), X-ray diffraction(XRD) and MM-200 wear test machine. The results show that the surface composite consists of TiC and Cr7C3as the reinforcing phase, α-Fe and γ-Fe as the matrix. The surface composite has excellent wear-resistance under dry-sliding wear test condition with heavy loads.

Friction and Wear Properties of Ti-6Al-4V Surface Modified by Nitriding-Mo Plating-Sulfurizing Composite Treatment

2010 ◽  
Vol 139-141 ◽  
pp. 439-442
Author(s):  
Li Jie Wang ◽  
Jun Sheng Yang ◽  
Ya Zhe Xing
Keyword(s):  
Friction And Wear ◽  
Composite Layer ◽  
Wear Test ◽  
Xrd Analysis ◽  
Wear Loss ◽  
Treatment Technique ◽  
Ion Nitriding ◽  
Wear Properties ◽  
Cross Sectional ◽  
Friction And Wear Properties

A composite layer was prepared on the Ti-6Al-4V alloy surface by ion nitriding, magnetron sputtering Mo and ion sulfurizing composite treatment technique. The phase structure, morphology, and cross-sectional element distribution of composite layer were analyzed. Friction and wear properties of composite layer were tested by MM-200 laboratory tester. XRD analysis showed that the composite layer was mainly comprised of Ti, Mo, MoS2, TiN, and transition layer. This composite layer is perfect wear-resistant surface due to existence of self-lubricating MoS2 on hard Mo and TiN layers with good anti-friction ability. Thereby, the results of friction and wear test showed that anti-wear performance of Ti-6Al-4V alloy after composite treatment was remarkably improved under dry and sliding conditions. Both the friction coefficient and the wear loss of the nitriding-Mo plating-sulfurizing layers were lower than that of the nitriding layer due to the formation of the MoS2 layer on Mo and TiN layers.

Plasma Sprayed Self-Lubricating Cr2O3-CaF2 Coatings: Friction and Wear Properties

1998 ◽  
Author(s):  
F. Vos ◽  
L. Delaey ◽  
M. De Bonte ◽  
L. Froyen
Keyword(s):  
Friction And Wear ◽  
Solid Lubricant ◽  
Composite Coatings ◽  
Substrate Surface ◽  
Wear Test ◽  
Ceramic Coatings ◽  
Wear Volume ◽  
Wear Properties ◽  
Wear And Friction ◽  
Friction And Wear Properties

Abstract An alternative production route to obtain thermally sprayed self-lubricating ceramic coatings is proposed and microstructural, friction and wear properties of these coatings are discussed. A preliminary powder treatment shows to induce a higher degree of homogeneity compared to conventionally deposited composite coatings, offering some perspectives for a further improvement of the lubricating and wear properties. This approach is illustrated using CaF2 as a solid lubricant dispersed in a Cr2O3 matrix, where the high melting point of the latter (Tm{Cr2O3} =2460°C) necessitates plasma spraying as deposition technique. The microstructure of the coatings is evaluated by a metallographic study of sections perpendicular and parallel to the substrate surface. Wear and friction behaviour is evaluated using reciprocating wear test Wear tracks are analysed by means of laser profilometry. The results are discussed in relation to test and production parameters. Test temperature as well as solid lubricant concentration predominantly affects the wear and friction properties. Using a surface temperature of 400°C a friction coefficient of 0.25 and a wear volume of 37*103 µm3 after 10.000 cycles are obtained for a coating containing 16 vol.% of CaF2.

Experimental Research on the Friction and Wear Properties of Ni-Based Composite Coating Prepared by Laser Cladding

2013 ◽  
Vol 747-748 ◽  
pp. 152-157 ◽  
Author(s):  
Shu Fa Chen ◽  
Cheng Long Feng ◽  
Jin Yang ◽  
Jin Song Chen
Keyword(s):  
Sliding Wear ◽  
Friction And Wear ◽  
Wear Behavior ◽  
Frictional Coefficient ◽  
Dry Sliding Wear ◽  
Wear Properties ◽  
Low Load ◽  
Moderate Load ◽  
Friction And Wear Properties ◽  
Worn Surface

In this study, the dry sliding wear behavior of Ni-based self-lubricating wear-resistant coating was characterized under various loads at 300 . Morphologies and compositions of the worn surface were analyzed by scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS). The experimental results showed that with the increase of load, both the frictional coefficient and wear rate decreased firstly, then slightly increased. A small amount of debris dispersed on the worn surface of the coating under low load (2 N). Since the effects of oxide layer and lubricant particles spreading onto the worn surface, the coating exhibited superior friction, and improved the wear properties under moderate load (5 N). As the load further increased, till up to 10N, the worn surface started to appear some shallow grooves and craters. This was contributed to the dispersion of carbides and lubricant particles.

Effect of Graphite on the Friction and Wear Properties of Cu-Based Friction Materials

2014 ◽  
Vol 788 ◽  
pp. 621-626 ◽  
Author(s):  
Jing Dan Wei ◽  
Hua Chen
Keyword(s):  
Friction Coefficient ◽  
Wear Rate ◽  
Friction And Wear ◽  
Wear Properties ◽  
Friction Materials ◽  
Graphite Content ◽  
Lubricating Film ◽  
Properties Of Materials ◽  
Friction And Wear Properties ◽  
High Graphite

Cu-based friction materials were prepared by powder metallurgy technology. The effect of the graphite on friction and wear properties of materials was investigated. The experimental results indicate that the wear rate of the materials increased with increasing speed. The wear rate of the materials with the graphite with the size of 300~600μm decreased with increasing graphite content, indicating that the graphite size of 300~600μm showed the good lubricating effect. The lubricating film made the friction coefficient decrease. The wear resistance of materials with 100~300μm graphite was degraded at high graphite content, and the graphite size of 100~300μm has bad effect on the strength of materials. The wear debris made the friction coefficient slightly increase with the increase of graphite content. The material with the graphite content of 10% and the graphite size of 300~600μm has the best friction and wear properties.

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.

Comparative Study of Friction and Wear Behavior of Diamond-Like Carbon Coating under the Lubrication of PAGs Containing Various Additives

2011 ◽  
Vol 130-134 ◽  
pp. 2754-2757
Author(s):  
Hao Wu ◽  
Yan Qiu Xia ◽  
Xin Feng ◽  
Xiang Yu Ge
Keyword(s):  
Tribological Properties ◽  
Carbon Coating ◽  
Friction And Wear ◽  
Wear Behavior ◽  
Wear Properties ◽  
Dlc Coatings ◽  
Friction And Wear Behavior ◽  
Friction And Wear Properties ◽  
Scanning Electron ◽  
Reducing Properties

The friction and wear properties of the DLC coatings were evaluated while being lubricated with pure PAG, PAG containing PN and ZDDP using reciprocating ball-on-disk sliding UMT tester, respectively. The morphologies of the worn surfaces of the DLC coatings were observed using a scanning electron microscope (SEM). The results indicated that the DLC coatings exhibited better tribological properties under the lubrication of PAG containing PN or ZDDP than that of pure PAG. In addition, PN and ZDDP as additives show different tribological properties. The former offers better anti-wear ability, the latter offers better friction-reducing properties.

STUDY ON FRICTION AND WEAR PROPERTIES OF SILVER MATRIX BRUSH MATERIAL WITH DIFFERENT ADDITIVES

2013 ◽  
Vol 27 (19) ◽  
pp. 1341037
Author(s):  
XIAOLI CHEN ◽  
WENFANG WANG ◽  
YU HONG ◽  
YUCHENG WU
Keyword(s):  
Friction And Wear ◽  
Wear Behavior ◽  
Friction Pair ◽  
Critical Value ◽  
Wear Loss ◽  
Wear Properties ◽  
Friction And Wear Behavior ◽  
Comprehensive Performance ◽  
Silver Matrix ◽  
Friction And Wear Properties

Friction and wear processes of AgCuX ( G , CF and AlN ) composites- CuAgV alloy friction pair and effects of different additive content in silver based composite on friction and wear behavior are studied in this paper. The microstructure of the brush wear surface is observed by SEM. The results show that when graphite content is up to 9 wt.%, Ag - Cu - CF - G composite exhibits the best wear properties; when the content of aluminum nitride is up to 0.5 wt.%, Ag - Cu - AlN - G composites has the most comprehensive performance. The wear loss of both composites arises with the increase of both pressure and speed, but when speed reaches a critical value, the increased amplitude of wear loss tends to be steady.

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