Tribological Behavior of Cenosphere-Filled Epoxy Syntactic Foams in Dry Sliding Conditions

2020 ◽  
Vol 142 (5) ◽  
Author(s):  
Ch. Sri Chaitanya ◽  
R. Narasimha Rao
Keyword(s):  
Wear Debris ◽  
Volume Fraction ◽  
Tribological Behavior ◽  
Applied Pressure ◽  
Tribological Performance ◽  
Syntactic Foams ◽  
Pin On Disc ◽  
Surface Examination ◽  
Worn Surface ◽  
Sliding Distance

Abstract The tribological behavior of the 10%, 20%, 30%, and 40% cenosphere-filled epoxy syntactic foams in terms of the wear rate and the friction coefficient of the foams were reported using a pin on disc tribometer in the present study. The influence of the wear parameters like applied pressure, sliding speed, and the sliding distance on the tribological performance of syntactic foams was reported. Syntactic foams with 40% cenosphere volume fraction exhibit better tribological properties over the other syntactic foams. The worn surface examination shows the adhesive dominant wear mechanism and the wear debris with broken cenosphere particles.

Wear Behavior of ZrO2-CNF and Si3N4-CNT Nanocomposites

2011 ◽  
Vol 465 ◽  
pp. 495-498 ◽  
Author(s):  
Pavol Hvizdoš ◽  
Annamária Duszová ◽  
Viktor Puchý ◽  
Orsolya Tapasztó ◽  
Peter Kun ◽  
...  
Keyword(s):  
Volume Fraction ◽  
Tribological Behavior ◽  
Wear Behavior ◽  
Carbon Nanofibres ◽  
Wear Rates ◽  
Pull Out ◽  
Pin On Disc ◽  
Material Volume ◽  
Wear Damage ◽  
Sliding Distance

Tribological behavior of ZrO2 and Si3N4 based nanocomposites with addition of carbon nanofibres and nanotubes has been studied by the pin-on-disc technique. Friction coefficients were measured and recorded, wear rates were calculated in terms of material volume loss per load and sliding distance. The wear damage was studied using optical and electron microscopy and its mechanisms were identified. In monolithic materials the dominant wear mechanism was abrasion, in composites with CNF and with higher volume fraction of CNTs (5 and 10%) fiber pull-out and lubricating by the carbon phases occurred.

Effects of SiO2 Particles on Wear Behavior of Cu-SiO2 Dispersion-Hardened Alloys

2007 ◽  
Vol 561-565 ◽  
pp. 659-662 ◽  
Author(s):  
Hisashi Sato ◽  
Yoshimi Watanabe
Keyword(s):  
Volume Fraction ◽  
Wear Behavior ◽  
Solid Particles ◽  
Wear Property ◽  
Wear Process ◽  
Hardened Alloy ◽  
Pin On Disc ◽  
Sio2 Particles ◽  
Worn Surface ◽  
Sliding Distance

Effects of solid particles on wear behavior of dispersion-hardened alloy were investigated using Cu-SiO2 alloys containing 0.6vol.%SiO2, 1.2vol.%SiO2 and 1.7vol.%SiO2 particles. Wear tests were made using pin-on-disc type wear machine. Wear property of the Cu-SiO2 alloys is improved by increasing volume fraction of SiO2 particles. Moreover, wear amounts of Cu-SiO2 alloys increase with increasing the sliding distance, and then are saturated at exceeding about 1km. This is why that SiO2 particle improves the strength of Cu-SiO2 alloy, and that the work hardening occurs on worn surface. Wear-induced layer is formed just below worn surface by severe plastic deformation due to wear, and its hardness increases as the volume fraction of SiO2 particles increases. From these obtained results, wear process of Cu-SiO2 alloy was discussed.

Improvement in the mechanical and tribological behavior of epoxy matrix with the inclusion of synthesized Ti3AlC2 MAX particles

2019 ◽  
Vol 53 (26-27) ◽  
pp. 3819-3827 ◽  
Author(s):  
Rasoul Jamshidi ◽  
Akbar Heidarpour ◽  
Hamed Aghamohammadi ◽  
Reza Eslami-Farsani
Keyword(s):  
Epoxy Matrix ◽  
Vickers Microhardness ◽  
Tribological Behavior ◽  
Tribological Performance ◽  
Epoxy Composites ◽  
Max Phase ◽  
Wear Properties ◽  
Pin On Disc ◽  
Worn Surface ◽  
Microscopy Images

This study has investigated the mechanical and tribological performance of epoxy composites filled with different contents of Ti3AlC2 MAX phase particles. The Ti3AlC2 particles were synthesized by the mechanical alloying of Ti, Al and C powders. The ultrasonic blending was used for preparing the mixture of Ti3AlC2 and epoxy matrix. The Vickers microhardness and pin on disc tests were carried out to investigate the mechanical and wear properties of samples, respectively. Moreover, the fracture and worn surface of the samples were analyzed by scanning electron microscopy images. Results showed that the microhardness values were increased due to increasing the content of Ti3AlC2 in the epoxy matrix. In this regard, the highest value of 39.24 Hv was achieved for composites containing 0.75 wt.% Ti3AlC2, which corresponds to the 75.4% improvement in microhardness value, compared to neat epoxy. Moreover, wear results demonstrated that the friction coefficient and wear rate values were decreased by the addition of Ti3AlC2 particles in the epoxy matrix.

Effect of TiC nanoparticles on microstructural and tribological properties of Cu-TiC nano-composites

2021 ◽  
pp. 095440542110298
Author(s):  
Nalin Somani ◽  
Nitin Kumar Gupta
Keyword(s):  
Tribological Behavior ◽  
Normal Load ◽  
Wear And Friction ◽  
Pin On Disc ◽  
Compaction Of Powders ◽  
Tic Nanoparticles ◽  
Mixed Layers ◽  
Worn Surface ◽  
Sliding Distance

The present study has investigated the role of the addition of TiC nanoparticles on the microstructural, mechanical, physical, and metallurgical properties of the Cu-TiC nanocomposites. A Powder metallurgy route was used to fabricate the samples. Cold compaction of powders was done at 480 MPa which was followed by sintering at 950°C. Wt.% of TiC was varied from 0% to 20%. A Pin-On-Disc tribometer was used to carry out the wear and friction tests. SEM and EDS techniques were used to explicate the morphology and microstructures of worn surfaces and to comprehend the underlying wear mechanism. The fabricated samples were investigated against the applied normal load (10, 20, and 30 N), sliding speed (0.5, 1.0, and 1.5 m/s), and sliding distance (900, 1800, and 2700 m). The results revealed that the Hardness and tensile strength were improved by 88.76% and 37.26% respectively due to the addition of TiC and were maximum for Cu-20%TiC while the relative density shows the reverse trend. Further, it was found that wear resistance and coefficient of friction were improved by 87.18% and 51.85% respectively as a function of nano-TiC content. The presence of oxide layers and mechanically mixed layers are detected from worn surface analysis which modulates the tribological behavior of the contact.

scholarly journals Influence of micro- and nanofiller contents on friction and wear behavior of epoxy composites

2017 ◽  
Vol 24 (4) ◽  
pp. 485-494 ◽  
Author(s):  
Iskender Ozsoy ◽  
Adullah Mimaroglu ◽  
Huseyin Unal
Keyword(s):  
Fly Ash ◽  
Friction And Wear ◽  
Filler Content ◽  
Wear Behavior ◽  
Tribological Performance ◽  
Epoxy Composites ◽  
Atmospheric Conditions ◽  
Wear Rates ◽  
Pin On Disc ◽  
Worn Surface

AbstractIn this study, the influence of micro- and nanofiller contents on the tribological performance of epoxy composites was studied. The fillers are micro-Al2O3, micro-TiO2, and micro-fly ash and nano-Al2O3, nano-TiO2, and nanoclay fillers. The microfillers were added to the epoxy by 10%, 20%, and 30% by weight. The nanofillers were added to the epoxy by 2.5%, 5%, and 10%. Friction and wear tests were conducted using the pin-on-disc arrangement. Tribo elements consisted of polymer pin and DIN 1.2344 steel counterface disc. A load value of 15 N, a sliding speed of 0.4 m/s, a sliding distance of 2000 m, and dry atmospheric conditions were applied to test conditions. The results show that the friction coefficients and the specific wear rates of the nanofilled composites increase as the filler content increases. For microfiller-filled epoxy composites, these values decrease as filler content increases. The tribological performance of epoxy composites is enhanced by the addition of microfillers, and the higher enhancement is reached with the addition of 30% fly ash filler. Finally, the pin and disc worn surface images show the presence of adhesive and some abrasive wear mechanisms.

Analysis of tribological behavior of medical-grade UHMW polyethylene under dry and lubricated conditions with human body fluids using Taguchi and GRA techniques

2020 ◽  
pp. 089270572094190
Author(s):  
Omar Hussain ◽  
Babar Ahmad ◽  
Shahid Saleem
Keyword(s):  
Synovial Fluid ◽  
Human Body ◽  
Tribological Behavior ◽  
Normal Load ◽  
Ultrahigh Molecular Weight Polyethylene ◽  
Tribological Performance ◽  
Body Fluids ◽  
Optimization Techniques ◽  
Pin On Disc

The present work focuses on evaluating the tribological behavior of ultrahigh molecular weight polyethylene (UHMWPE) with 316L stainless steel and Ti6Al4V under dry and lubricated sliding conditions using human body fluids (synovial fluid and human serum). Eighteen trials of experiments were performed using a reciprocating sliding tribometer (pin-on-disc) at 37°C based on Taguchi’s L18 (21 × 32) array. The in-vitro experimental results revealed that UHMWPE offers better tribological performance under synovial fluid lubrication conditions irrespective of the counterface material. The optimization of the response variables (coefficient-of-friction (COF) and specific wear rate (WR)) was performed using optimization techniques (Taguchi and Grey relational analysis). It was revealed that Ti6Al4V counterface material under synovial fluid lubrication and normal load of 52 N exhibits the optimal tribological performance with UHWMPE. The contribution of process parameters on the COF and WR was evaluated using analysis of variance. It was established that load is the most significant parameter, affecting COF and WR.

Study of Wear Properties of In Situ TiB/TiC Reinforced Ti1100 Composites

2013 ◽  
Vol 550 ◽  
pp. 107-113
Author(s):  
Xiao Lu Gong ◽  
Fei Zhao ◽  
Di Zhang
Keyword(s):  
Shear Stress ◽  
Wear Debris ◽  
Matrix Alloy ◽  
Stress Distributions ◽  
Wear Properties ◽  
Wear Process ◽  
The Matrix ◽  
Pin On Disc ◽  
Worn Surface

The tribological performances of in-situ (TiB + TiC) / Ti1100 composites prepared by casting and the matrix alloy were tested by pin-on disc mode. The worn surface and wear debris were investigated by SEM. The models of the composites during the wear process were simulated by ABAQUS FEA software. The analysis shows the stress distributions inside the composites under the different shear stress. The wear mechanism of the composites is probed.

Influence of Steel Surface Preparation Method on Topography and Tribological Behaviour in Dry Sliding Conditions

2016 ◽  
Vol 674 ◽  
pp. 265-270 ◽  
Author(s):  
Andrzej Dzierwa
Keyword(s):  
Wear Debris ◽  
Steel Surface ◽  
Preparation Method ◽  
Tribological Behavior ◽  
Surface Preparation ◽  
Tribological Behaviour ◽  
Contact Conditions ◽  
Disc Surface ◽  
Pin On Disc ◽  
Steel Disc

Tribological tests were conducted using a pin-on-disc tester. In the experiment, a steel disc of hardness 40 HRC was put in contact with a steel ball of hardness 62 HRC. Disc samples were prepared in order to obtain very similar values of the Sa parameter, smaller than 0.5 μm. Different methods of preparing smooth surfaces were used. Dry tests using similar contact conditions were carried out. During tests, the friction force was monitored as a function of time. Wear of discs and balls was measured after the test using white light interferometer. In order to decrease variation of the experimental results, during tests the wear debris was continuously removed from the disc surface. It was shown that type of treatment play a role on tribological behavior of sliding pairs.

ABRASIVE WEAR BEHAVIOUR OF COPPER-SiC AND COPPER-SiO2 COMPOSITES

2013 ◽  
Vol 22 ◽  
pp. 416-423 ◽  
Author(s):  
TEJAS UMALE ◽  
AMARJIT SINGH ◽  
Y. REDDY ◽  
R. K. KHATITRKAR ◽  
S. G. SAPATE
Keyword(s):  
Abrasive Wear ◽  
Wear Debris ◽  
Copper Matrix ◽  
Wear Behaviour ◽  
Wear Volume ◽  
Matrix Composites ◽  
Debris Particles ◽  
Pin On Disc ◽  
Abrasive Wear Behaviour ◽  
Sliding Distance

The present paper reports abrasive wear behaviour of copper matrix composites reinforced with silicon carbide and silica particles. Copper – SiC (12%) and Copper-SiO2 (9%) composites were prepared by powder metallurgical technique. Metallography, image analysis and hardness studies were carried out on copper composites. The abrasive wear experiments were carried out using pin on disc apparatus. The effect of sliding distance and load was studied on Copper – SiC (12%) and Copper-SiO2 (9%) composites. The abrasive wear volume loss increased with sliding distance in both the composites although the magnitude of increase was different in each case. Copper – SiC (12%) composites exhibited relatively better abrasion resistance as compared to and Copper-SiO2 (9%) composites. The abraded surfaces were observed under scanning electron microscope to study the morphology of abraded surfaces and operating wear mechanism. The analysis of wear debris particles was also carried out to substantiate the findings of the investigation.

The Effect of Boron Nitride on Tribological Behavior of Mg Matrix Composite at Room and Elevated Temperatures

2019 ◽  
Vol 142 (1) ◽  
Author(s):  
Fatih Aydin ◽  
M. Emre Turan
Keyword(s):  
Boron Nitride ◽  
Wear Debris ◽  
Sliding Wear ◽  
Solid Lubricant ◽  
Elevated Temperatures ◽  
Tribological Behavior ◽  
Wear Behavior ◽  
Thermal Softening ◽  
Dry Sliding Wear ◽  
Worn Surface

Abstract The goal of the study is to examine the dry sliding wear behavior of pure Mg and Mg/nano-boron nitride (BN) composite at elevated temperatures. The wear behavior of the samples was evaluated under loads of 5, 10, and 20 N, at sliding speed of 80, 130, and 180 mm s−1 and at temperatures of 25, 100, and 175 °C. The examination of worn surface, counterface, and wear debris was performed. The results showed that nano-BN particles lead to substantial enhancement of wear resistance for both room and elevated temperatures. Mg/0.25 BN has lower coefficient of friction values due to the presence of BN which act as solid lubricant. The wear mechanisms are thermal softening, melting, oxidation, abrasion, and delamination.

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