Study on Tribology Properties of Graphite/TiC/Ni-Base Alloy Composite Coating

2011 ◽  
Vol 314-316 ◽  
pp. 137-142
Author(s):  
Bin Cai ◽  
Ye Fa Tan ◽  
Hui Yong Ji ◽  
Xiao Long Wang ◽  
Long He ◽  
...  
Keyword(s):  
Friction Coefficient ◽  
Composite Coating ◽  
Sliding Wear ◽  
Base Alloy ◽  
Alloy Coating ◽  
Dry Sliding Wear ◽  
Wear Loss ◽  
Dry Sliding ◽  
Alloy Composite ◽  
Nacl Solution

In order to reduce friction coefficient of the Ni-base alloy coating and further improve its wear resistance, the graphite/TiC/Ni-base alloy composite coating was prepared on the surface of 45 carbon steel by plasma spray. Effects of loads, friction counterparts and lubricants on tribological properties of the coating were investigated. The results show that friction coefficient of the composite coating is reduced by 33% than that of the Ni-base alloy coating when worn against GCr15. Wear losses of the composite coating are less than those of the Ni-base alloy coating at all loads of 6N, 8N, 10N and 12N. Worn against Si3N4, friction coefficient of the composite coating is 13% less than that worn against GCr15, but its wear loss is 2.9 times of that worn against GCr15. Wear mechanism of the composite coating is micro cutting and brittle fraction when worn against Si3N4. Under lubrication of NaCl solution, friction coefficient of the composite coating is almost the same as that under dry sliding, wear loss is increased by 1.6 times. Stress corrosion and wedging effects of the NaCl solution are main wear mechanisms of the composite coating.

Effects of Tribo-Couple and Environmental Medium on the Tribological Properties of the Graphite/CaF2/TiC/Ni-Base Alloy Composite Coating

2013 ◽  
Vol 834-836 ◽  
pp. 644-648
Author(s):  
Bin Cai ◽  
Hua Bing Li ◽  
Ye Fa Tan ◽  
Hong Wei Li ◽  
Qi Feng Jing ◽  
...  
Keyword(s):  
Wear Rate ◽  
Composite Coating ◽  
Tribological Properties ◽  
Base Alloy ◽  
Alloy Coating ◽  
Dry Sliding ◽  
Wear Property ◽  
Alloy Composite ◽  
Nacl Solution ◽  
Wear Rates

The graphite/CaF2/TiC/Ni-base alloy composite coating was prepared on the surface of 45 carbon steel by plasma spray. Effects of loads, friction counterparts and lubricants on the tribological properties of the composite coating were investigated. The results show that the wear rate of the GCTN composite coating against Si3N4is 0.67×10-3mm3/m, which is about 2 times that against GCr15 steel, because Si3N4induces micro-cutting wear of the composite coating. Water and NaCl solution may induce increasing of friction coefficients and wear rates. Especially, wear rate of the GCTN composite coating in NaCl solution is increased by 3.1 times compared with those under dry sliding and water. The GCTN composite coating presents better anti-wear property than Ni-base alloy coating in different environmental mediums.

scholarly journals Effect of Cd on Microstructure and Dry Sliding Wear Behavior of (Al-12%Si) Alloy

2010 ◽  
Vol 7 (1) ◽  
pp. 1 ◽  
Author(s):  
Muna K. Abbass
Keyword(s):  
Friction Coefficient ◽  
Sliding Wear ◽  
Wear Behavior ◽  
Base Alloy ◽  
Dry Sliding Wear ◽  
Dry Sliding ◽  
Wear Properties ◽  
Hard Particles ◽  
Pin On Disc ◽  
Steel Disc

 The aim of the present research is to study the effect of cadmium addition on microstructure and wear behavior of the alloy (Al-12%Si) under dry sliding conditions. Wear behavior was studied by using the Pin-On- Disc technique under different conditions at applied loads 5-20 N, at constant sliding speed and in constant time. The steel disc hardness was 35HRc. All alloys were prepared with different percentages of cadmium (1.0, 2.0, 3.0) wt%. Also the base alloy was prepared by melting and pouring the molten metal in a metallic mold. It was found that the cadmium addition to Al-Si matrix decreases the wear rate and improves the wear properties for alloys containing -Cd under loads above 10N. It was also found that the alloy Al-12%Si containing 3%Cd is the best alloy in wear resistance and friction coefficient. This is due to presence of the Cd-phase as cuboids or hard particles distributed in a eutectic matrix which reduces the friction coefficient at high loads (20N). 

Effects of Primary Si and Applied Load on the Dry Sliding Wear Behaviors of Hypereutectic Al-20Si Alloy

2014 ◽  
Vol 490-491 ◽  
pp. 83-87
Author(s):  
Qing Lin Li ◽  
Tian Dong Xia ◽  
Ye Feng Lan ◽  
Yi Sheng Jian
Keyword(s):  
Friction Coefficient ◽  
Wear Rate ◽  
Sliding Wear ◽  
Applied Load ◽  
Rate Increase ◽  
Treatment Temperature ◽  
Dry Sliding Wear ◽  
Dry Sliding ◽  
Wear Properties ◽  
Primary Si

The effects of the primary Si phase and applied load on the dry sliding wear behaviors of hypereutectic Al-20Si alloy were investigated. The results show that coarse polygonal and star-like primary Si was refined into fine blocky shape by increasing superheat treatment temperature. The friction coefficient and wear rate significantly decrease after decreasing the size and changing the morphology of primary Si. Moreover, the friction coefficient and wear rate increase with the increase of applied load. Therefore, the wear properties are greatly influenced by the parameters like morphology and size of primary Si as well as applied load.

Optimization of Dry Sliding Wear Parameters of MWCNT Reinforced Poly-Ether-Ether-Ketone (PEEK) Composites

2015 ◽  
Vol 813-814 ◽  
pp. 218-225 ◽  
Author(s):  
T. Rajmohan ◽  
D. Kumar ◽  
S. Manimaran
Keyword(s):  
Sliding Wear ◽  
High Wear Resistance ◽  
Dry Sliding Wear ◽  
Wear Loss ◽  
Dry Sliding ◽  
Relative Significance ◽  
Control Factors ◽  
Ether Ether Ketone ◽  
Poly Ether Ether Ketone ◽  
Ether Ketone

Poly-ether-ether-ketone (PEEK) becomes one of the most promising polymer material for the tribological applications because of its outstanding performance such as high mechanical properties, high chemical resistance, and high wear resistance. The present work is focused on optimization of dry sliding wear parameters of MWCNT reinforced PEEK matrix composites using RSM based desirability approach. The materials used for the present investigation are unreinforced PEEK and reinforced with 0.5% and 1% MWCNT. Wear parameters such as load, sliding speed and % of MWCNT are chosen as control factors to optimize the wear loss and coefficient of friction. An experimental plan of a L9 based on Taguchi design is employed to carry out the experimental study. After conducting experiment, mathematical models have been developed to fit the output responses using Response surface methodology and drilling parameters have been optimized using Desirability based approach. This methodology deals with the development of modelling equations for each response. The relative significance of the various parameters has been found using ANOVA.

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