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.

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.

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.

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.

Physical and Wear Properties of UHMWPE Fabric Reinforced Epoxy Composites

2020 ◽  
Vol 17 (1) ◽  
pp. 7577-7586 ◽  
Author(s):  
P. Rajendra Prasad ◽  
J. N. Prakash ◽  
L. H. Manjunath ◽  
P. Venkateshwar Reddy
Keyword(s):  
Wear Rate ◽  
Sem Analysis ◽  
Epoxy Composites ◽  
Specific Wear Rate ◽  
Synthetic Fiber ◽  
Dry Sliding Wear ◽  
Wear Properties ◽  
Steel Material ◽  
The Matrix ◽  
Pin On Disc

Usage of synthetic fiber reinforced composites has increased rapidly because of their excellent properties such that it acts as a replacement for metals in the recent days. The physical and wear properties of Ultra-High Molecular Weight Polyethylene (UHMWPE) fabric reinforced epoxy composites have been studied in this present work. Using pin-on-disc test rig, dry-sliding wear of test specimens have been tested against disc of EN31 steel material. The plain woven bi-directional 200gsm and 240gsm UHMWPE fabric reinforced epoxy composites were fabricated by hand lay-up method at room temperature. All the tests were conducted as per the Taguchi’s L9 orthogonal-array. The process parameters considered in the present study is load, sliding velocity and sliding time with three levels each. Specific wear rate is considered as the response variable.  Optimization is carried out to find best combination of parameters on specific wear rate.  From the results, it is evident that load has greater influence on specific wear rate than other two considered parameters.  Scanning Electron Microscopy (SEM) analysis was also carried out to examine the matrix distribution over fabric (reinforcement) and also their bonding between reinforcement and matrix.

Effect of ZnO Particles on Microstructure, Microhardness and Wear Behaviour of AA7068 Metal Matrix Composites Synthesized by Powder Metallurgy

2020 ◽  
Vol 979 ◽  
pp. 68-73 ◽  
Author(s):  
K. John Joshua ◽  
S.J. Vijay ◽  
P. Ramkumar ◽  
S. Mohanasundaram
Keyword(s):  
Powder Metallurgy ◽  
Vickers Microhardness ◽  
Matrix Material ◽  
Sem Analysis ◽  
Wear Behaviour ◽  
Matrix Composites ◽  
Zno Particles ◽  
The Matrix ◽  
Pin On Disc ◽  
Worn Surface

AA7068/ZnO composites were synthesized by powder metallurgy technique with different weight percentages of ZnO (5%, 10%, and 15%) along with as sintered AA7068. A low pressure of 318 MPa was applied for compaction and sintered at a temperature of 560°C for one hour. Microstructural behavior was studied using optical microscopy. Vickers microhardness test was conducted to find out the microhardness. Using pin-on-disc wear-tester experiments were conducted with a velocity of 1.2 m/s over a sliding distance of 2.5 km of load 5 N. Scanning Electron Microscopy (SEM) analysis was carried out to investigate the worn surface. Experimental results showed that the Vickers microhardness number have been increased to 66 by addition of 15% ZnO, which was double that of the matrix material. Wear experiments revealed improved wear resistance by the addition of ZnO particles. SEM analysis exposed that abrasion, delamination and oxidation were the predominant wear mechanisms for the matrix material and AA7068-5% ZnO composite and adhesion and oxidation for composites reinforced with 10% and 15% ZnO particles.

Effects of frictional heat on the tribological properties of Ni3Al matrix self-lubricating composite containing graphene nanoplatelets under different loads

2017 ◽  
Vol 232 (6) ◽  
pp. 645-656 ◽  
Author(s):  
Yuchun Huang ◽  
Xiaoliang Shi ◽  
Kang Yang ◽  
Xiyao Liu ◽  
Zhihai Wang
Keyword(s):  
Working Conditions ◽  
Friction And Wear ◽  
Sliding Friction ◽  
Tribological Behavior ◽  
Tribological Performance ◽  
Graphene Nanoplatelets ◽  
Frictional Heat ◽  
Worn Surface ◽  
Al Matrix ◽  
Better Than

In order to analyze the effects of frictional heat on the tribological performance of Ni3Al matrix self-lubricating composite containing 6.2 vol.% graphene nanoplatelets (NB), the dry sliding friction tests of Ni3Al-based alloy and NB against GCr15 steel ball are undertaken under different loads from 3 to 18 N. The effects of different amount of frictional heat on the friction and wear mechanism of NB are also studied. The results show that tribological performance of NB is better than that of Ni3Al-based alloy under same working conditions. The addition of graphene nanoplatelets promotes the formation of stable glaze layer on worn surface. In addition, graphene nanoplatelets enhance the thermal conductivity of NB, which makes the surface temperature of wear scar of NB in a proper range (about 413 ℃) at 13 N and avoids the serious friction and wear caused by the accumulation of frictional heat. At 13 N, NB shows the lower friction coefficient (0.32) and wear rate (3.6 × 10−5 mm3·N−1·m−1). It is attributed to the appropriate local temperature (about 413 ℃) of worn surface, resulting in the formation of stable glaze layer with good friction reducing and wear resistance on worn surface. This study was meaningful for optimizing applied loads to realize the appropriate frictional heat and good tribological behavior of NB.

Effects of Surface Roughness Parameters on Tribological Performance for Micro-textured Eutectic Aluminum–Silicon Alloy

2019 ◽  
Vol 142 (2) ◽  
Author(s):  
Luanxia Chen ◽  
Zhanqiang Liu ◽  
Xin Wang ◽  
Qingqing Wang ◽  
Xiaoliang Liang
Keyword(s):  
Photoelectron Spectroscopy ◽  
Laser Scanning ◽  
Tribological Performance ◽  
Test Results ◽  
Roughness Parameters ◽  
Aluminum Silicon Alloy ◽  
Pin On Disc ◽  
Different Depths ◽  
Worn Surface ◽  
The Relationship

Abstract Micro-textured samples with different depths exhibit various contact surface morphology parameters including Sa, Sq, Ssk, and Sku, and material ratio curves. In this paper, the relationship between micro-textures and roughness parameters was investigated. The effect mechanism of micro-textures on the friction and wear through the height and functional roughness parameters was elucidated. Micro-textured samples presented more negative Ssk, higher Sku, and larger Svk with the increasing dimple depth. The pin-on-disc reciprocating tribological test results indicated that the more negative Ssk, higher Sku, and larger Svk presented lower friction coefficient under the constant Sa and Sq. The wear topographies for the flat and micro-textured specimens with various dimple depths were examined by laser scanning confocal microscope. X-ray photoelectron spectroscopy was employed to describe the formation of absorbed film and tribofilm on the worn surface of flat and micro-textured samples. It was confirmed that more negative Ssk, higher Sku, and material ratio curves with their relative parameters (smaller value of Spk, Sk, Smr1, and larger value of Svk) could be used for predicting the tribological performance of micro-textured samples.

Effects of Surface Coating on Wear Properties of A356-20vol.%SiCp Composites

2007 ◽  
Vol 124-126 ◽  
pp. 1409-1412
Author(s):  
Jung Moo Lee ◽  
Suk Bong Kang ◽  
Jian Min Han
Keyword(s):  
Surface Coating ◽  
Sliding Wear ◽  
Wear Test ◽  
Dry Sliding Wear ◽  
Wear Properties ◽  
Pin On Disc ◽  
Micro Arc Oxidation ◽  
Worn Surface ◽  
Wear Tests

Thick alumina coatings were performed on A356-20vol.% SiCp composites by micro-arc oxidation (MAO) process with different processing time. The dry sliding wear tests were performed on A356-20vol.% SiCp composites with and without surface coating. The samples were tested by pin-on-disc wear test equipment with different applied load and sliding velocity. It is revealed that MAO coating improves resistance to wear of A356-20vol.% SiCp composites in the severe wear conditions. On the basis of the observations and analysis of the worn surface, worn subsurface, wear debris and variation of friction coefficient, the role of MAO coating layer is examined.

scholarly journals Mechanical and Tribological Behavior of Particulate Filled Silicon Nitride Reinforced Nylon-6 Polymer Composites

2019 ◽  
Vol 8 (6) ◽  
pp. 3951-3955
Keyword(s):  
Silicon Nitride ◽  
Tribological Behavior ◽  
Normal Load ◽  
Wear Test ◽  
Tensile Tests ◽  
Polyamide 6 ◽  
Nylon 6 ◽  
Wear Properties ◽  
Pin On Disc ◽  
Sliding Distance

From the Research, it found that there is an impact of Silicon Nitride (Si3N4 ) on the mechanical properties of Nylon 6 or polyamide 6 based composites. Nylon 6 prepared with Silicon Nitride (Si3N4 ) by changing the weight proportions. The hardness and wear properties of Nylon-6/Si3N4 composites have investigated. Experiments were carried out as per Taguchi's design. Rockwell, hardness testing device, used to observe the hardness number of different nylon-6/ Si3N4 composites and the pin-on-disc wear test (ASTM G99) conducted with different combinations of reinforcement, sliding distance, sliding speed and normal load. Scanning electron microscopy (SEM) was used to look at the break surfaces microstructure of wear and tensile tests. The increase of Si3N4 upgrades the existence state of typical Nylon 6 to a more important point.

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