Biotribological performance of medical-grade UHMW polyethylene-based hybrid composite for joint replacement

2021 ◽  
Vol 29 (9_suppl) ◽  
pp. S1424-S1431
Author(s):  
Omar Hussain ◽  
Babar Ahmad ◽  
Shahid Saleem Sheikh
Keyword(s):  
Human Serum ◽  
Wear Behavior ◽  
Normal Load ◽  
X Ray Diffraction ◽  
Weight Percentage ◽  
Nano Powder ◽  
Nano Alumina ◽  
Human Body Temperature ◽  
Pin On Disc ◽  
Sem Micrograph

Ultra high molecular weight polyethylene (UHMWPE) is widely used for articulating surfaces in total hip and knee replacements. In the present work, the tribological properties of UHMWPE-based nano composites were studied in order to meet the demands of current bearing applications. UHMWPE matrix reinforced with 0.5, 1, and 2 weight percentage of alumina nano powder were fabricated by hot pressing. The dispersion and microstructure of composite material was established by X-ray diffraction (XRD) and scanning electron microscope (SEM) micrograph. The tests were carried out on a reciprocating sliding pin-on-disc tribometer at human body temperature (37±1°C) under dry and human serum lubricating environments for a normal load of 46 N and 52 N, a constant sliding speed of 4 mm. Under these testing conditions, it has been observed that the wear behavior of the developed composites improved with increase in weight percentage of alumina nano powder. The results show that at 52 N load, the maximum value of wear rate was 7.9x10−7 mm3/Nm and the minimum value 1.6x10−7 mm3/Nm was obtained. SEM was used to examine the worn surface and it was observed that human serum adheres to the surface of the composite pins upon sliding, resulting in the formation of a film which results in better wear resistance of the composite pins under human serum lubrication than dry sliding. This study implies that the use of nano alumina power will reduce the wear of UHMWPE based composite under human serum lubrication.

Microstructure and Wear Performance of Cu-Mo-Si Alloys Fabricated by Self-Propagation High-Temperature Synthesis

2010 ◽  
Vol 658 ◽  
pp. 408-411
Author(s):  
Hui Xie ◽  
Lei Jia ◽  
Si Ming Wang ◽  
Ji Ling Zhu ◽  
Zhen Lin Lu
Keyword(s):  
High Temperature ◽  
Wear Behavior ◽  
X Ray Diffraction ◽  
Temperature Synthesis ◽  
Wear Performance ◽  
X Ray ◽  
Cu Content ◽  
High Temperature Synthesis ◽  
Pin On Disc ◽  
Worn Surface

Cu-Mo-Si alloys with different Cu contents were prepared by self-propagation high-temperature synthesis (SHS). The microstructure and the worn surface morphology were observed using scanning electron microscopy (SEM) together with energy dispersive X-ray spectroscopy (EDS) analysis. Phase composition was determined by X-ray diffraction (XRD). The wear behavior of the Cu-Mo-Si alloys was characterized by pin-on-disc wear tester. The results showed that most of Si atoms dissolved in Cu matrix or resulted in formation of compound with Cu, while only small amount of Si atoms reacted with Mo atoms to form Mo5Si3 particles in the Cu-Ni-Si alloys with 80% Cu content. The wear rate of Cu-Mo-Si alloys descended with a decrease of Cu content, and the predominant wear mechanism could be identified as abrasive wear for Cu content less than 90% and plastic deformation for Cu content higher than 90%.

Fabrication and tribological behavior of novel UHMWPE/vitamin-C/graphene nanoplatelets based hybrid composite for joint replacement

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Omar Hussain ◽  
Shahid Saleem Sheikh ◽  
Babar Ahmad
Keyword(s):  
Composite Materials ◽  
Vitamin C ◽  
Human Serum ◽  
Hybrid Composite ◽  
Wear Behavior ◽  
Tribological Performance ◽  
Graphene Nanoplatelets ◽  
Morphological Examination ◽  
Content Type ◽  
Weight Percentage

Purpose This study aims to fabricate and investigate the tribological performance of ultra-high molecular weight polyethylene (UHMWPE)-based composite materials reinforced with 0.5, 1 and 2 weight percentage of graphene nanoplatelets (GNPs) while keeping the weight percentage of vitamin C constant at 2% for each composite. Design/methodology/approach In this paper, the composites were fabricated using hot pressing, and the dispersion of GNP/vitamin C/UHMWPE hybrid composite was investigated by X-ray diffraction. Experimental trials were performed according to ASTM F732 on a reciprocating sliding tribometer (pin-on-disc) at human body temperature of 37 ± 1 °C, for a load of 52 N, to assess the role of these fillers on the tribological properties of UHMWPE against Ti6Al4V counter body material under dry and lubricating (human serum) environment. Findings In this study, it has been observed that friction and wear behavior of the developed composites improve with increase in weight percentage of GNP, and human serum adheres to the surface of the composite pins upon sliding, resulting in the formation of a film, which results in better wear resistance of the composite pins under human serum lubrication than dry sliding. Scanning electron microscope was used to investigate the worn surface morphological examination of the composite materials. Specific wear rate of 0.76 × 10−7 mm3/Nm was attained for 2 Wt.% GNP-filled composite under human serum lubrication. Practical implications The results indicate the compatibility of the composite material used in this study and suggested the in vitro implant application. Originality/value The presented work includes novel study of synergistic effect of GNP (which acts as a solid lubricant) and vitamin C (added as an antioxidant) on the tribological performance of UHMWPE under dry and human serum lubrication.

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.

scholarly journals Influence of Processing on the Microstructure and Properties of CoCrMoSi Alloy PTA Coatings

2015 ◽  
Vol 20 (2) ◽  
pp. 219-227 ◽  
Author(s):  
R.G Bohatch ◽  
J.N Athayde ◽  
J.C.M Siqueira ◽  
A.S.C.M D´Oliveira ◽  
A. Scheid
Keyword(s):  
Solid Solution ◽  
Chemical Composition ◽  
Wear Behavior ◽  
Mass Loss Rate ◽  
Lamellar Microstructure ◽  
Laves Phase ◽  
X Ray Diffraction ◽  
Pin On Disc ◽  
Cast Alloys ◽  
Iron Chromium

AbstractWear performance as well as the low toughness of CoCrMoSi alloys is associated with the presence of Laves phase. In light of this, alloying elements have been altered in order to reduce the brittleness of newly-cast alloys. This study evaluated coatings by Plasma Transferred Arc (PTA) with different interactions with the AISI 316L substrate. The higher the dilution, it was hypothesized, the higher Iron, Chromium and Nickel contents proceeding from substrate and, therefore, the lower hard Laves phase fraction. Coatings were characterized by light and scanning electron microscopy, X-ray diffraction and Vickers hardness. Wear behavior was assessed by pin-on-disc and ball-on-flat tests. Laves phase and Cobalt solid solution eutectic lamellar microstructure was observed for coating processed with 120A (18% dilution). The chemical composition was displaced to hypoeutectic, showing Cobalt solid solution dendrites and interdendrictic eutectic lamellar for the coatings processed with higher current intensity (150 / 180A), due to the higher interaction with the substrate (26 / 38% dilution). Dilution increased with the deposition current, causing hardness to decrease from 702 – 526 HV0.5. Wear mass loss rate increased by up to 41.7% and friction coefficient (μ) ranged from 0.45 – 1.06 as the chemical composition changed.

SURFACE MODIFICATION OF 316L STAINLESS STEEL BY PLASMA-ASSISTED LOW TEMPERATURE CARBURIZING PROCESS

2017 ◽  
Vol 24 (08) ◽  
pp. 1750116 ◽  
Author(s):  
M. SARAVANAN ◽  
N. VENKATESHWARAN ◽  
A. DEVARAJU ◽  
A. KRISHNAKUMARI ◽  
J. SAARVESH
Keyword(s):  
Stainless Steel ◽  
Low Temperature ◽  
Wear Rate ◽  
316L Stainless Steel ◽  
Wear Behavior ◽  
S Phase ◽  
X Ray Diffraction ◽  
Time Period ◽  
Acid Etch ◽  
Pin On Disc

This paper aims at improving the hardness and wear resistance of Austenitic 316L Stainless Steel (SS) by Plasma-assisted Low Temperature Carburizing (PLTC) process. The process has been employed in austenitic 316L SS for achieving carbon supersaturated phase, the so-called “S Phase”. The microstructure of the treated specimens was characterized by Optical microscopy, Scanning Electron Microscopy (SEM) and X-Ray Diffraction (XRD). The results showed evidences of expanded austenite phase and formation of “S phase” at a temperature of 460[Formula: see text]C with 10% of methane (CH[Formula: see text] and 90% of hydrogen (H[Formula: see text] at a pressure of 1mbar for a time period of 20[Formula: see text]h. The hardness of the specimen was evaluated as 1030[Formula: see text]HV using Vickers microhardness setup. The wear behavior of plasma treated specimen was studied using pin on disc test at ambient condition and the results are discussed. Wear rate in PLTC 316L SS was observed to be low when compared with the wear rate of the untreated 316L SS specimen. The PLTC 316L SS specimen is subjected to ASTM A262 oxalic acid etch test to study the intergranular corrosion behavior. The “step” formation was observed in the SEM micrographs which reveal the retention of corrosion resistance in the specimen.

scholarly journals Optimization of Wear Performance of Electroless Ni-B Coating under Lubrication

2016 ◽  
Vol 7 ◽  
pp. 94-103 ◽  
Author(s):  
Santanu Duari ◽  
Arkadeb Mukhopadhyay ◽  
Tapan Kumar Barman ◽  
Prasanta Sahoo
Keyword(s):  
Tribological Behavior ◽  
Normal Load ◽  
Substrate Material ◽  
X Ray Diffraction ◽  
Wear Performance ◽  
X Ray ◽  
Confirmation Test ◽  
Pin On Disc ◽  
Electroless Ni ◽  
Wear Tests

This paper presents an experimental study on tribological behavior of electroless Ni-B coating under lubricated condition based on Taguchi’s method. Mild steel specimens are used as the substrate material for the deposition of Ni-B coating and the thickness of the deposits is found to be around 35 μm. Based on Taguchi’s L27 orthogonal array of experiments, the wear tests are done on a pin-on-disc type tribotester This experiment is carried out by utilizing the combination of process parameters of the tribotester like normal load, sliding speed and duration of sliding. The analysis of the experimental data is carried out with the help of MINITAB® software package. It is seen that the normal load is the most significant factor followed by sliding time at 99% confidence level. The surface morphology, composition and compound analysis of the coatings are done by means of scanning electron microscope, energy dispersed X-ray micro-analyzer and X-ray diffraction analyzer respectively. Finally, a confirmation test is carried out to validate the analysis.

scholarly journals Optimization of Wear Behavior of Al 5456 Alloy/TiB2 Composite using ANOVA and TAGUCHI Method

2019 ◽  
Vol 8 (2S11) ◽  
pp. 3110-3113
Keyword(s):  
Wear Rate ◽  
Taguchi Method ◽  
Software Package ◽  
Wear Behavior ◽  
Stir Casting ◽  
Sliding Velocity ◽  
Weight Percentage ◽  
Casting Technique ◽  
Pin On Disc ◽  
Composite Samples

In this present study, wear behavior of Al 5456 Alloy reinforced with 0,3 and 6 wt %TiB2 were investigated by ANOVA and Taguchi’s (L9 ) method. The composite samples were prepared by stir casting technique. Wear experiment was carried out by pin on disc apparatus under the different parameters of loads (10N, 20N and 30N), sliding velocity (2,4 and 6m/s) and time (10,15 and 20 min).This paper revealed that addition of Titanium diboride (TiB2 ) improves the wear resistance of Al5456 composite. The result showed that wear rate was decreased with increasing the weight percentage of TiB2 . ANOVA and Taguchi method results were tabulated in MINITAB-18 Software package to analyze the influence of individual parameters on the wear rate. Additionally, regression equation was also found the relation between input parameters and wear rate

Effect of Reinforcements on the Sliding Wear Behavior of Self-Lubricating AZ91D-SiC-Gr Hybrid Composites

2022 ◽  
Vol 10 (1) ◽  
pp. 1-19
Author(s):  
Sandeep Kumar Khatkar ◽  
Rajeev Verma ◽  
Suman Kant ◽  
Narendra Mohan Suri
Keyword(s):  
Wear Rate ◽  
Sliding Wear ◽  
Hybrid Composites ◽  
Wear Behavior ◽  
Signal To Noise Ratio ◽  
Normal Load ◽  
Critical Factor ◽  
Wear Properties ◽  
Pin On Disc ◽  
Sliding Distance

This article statistically investigates the effect of various parameters such as material factors: silicon carbide (SiC) reinforcement, graphite (Gr) reinforcement and mechanical factors: normal load, sliding distance and speed on the sliding wear rate of vacuum stir cast self-lubricating AZ91D-SiC-Gr hybrid magnesium composites. The sliding wear tests have been performed on pin-on-disc tribometer at 10-50N loads, 1-3m/s sliding speed and 1000-2000m sliding distance. It has been examined that hybrid composites yielded improved wear resistance with reinforcement of SiC and solid lubricant graphite. ANOVA and signal-to-noise ratio investigation indicated that applied load was the most critical factor influencing the wear rate, followed by sliding distance. Further, the AZ91D/5SiC/5Gr hybrid composite has exhibited the best wear properties. From the SEM and EDS analysis of worn surfaces, delamination was confirmed as the dominant wear mechanism for AZ91D-SiC-Gr hybrid composites.

Studying Wear Behavior of Ni-Ti- Ag Shape Memory Alloy Synthesized by P/T

2020 ◽  
Vol 38 (6A) ◽  
pp. 846-853
Author(s):  
Suad A. Shihab ◽  
Khansaa D. Salman ◽  
Laith J. Saud
Keyword(s):  
Phase Transformation ◽  
Shape Memory ◽  
Wear Behavior ◽  
Mixing Process ◽  
X Ray Diffraction ◽  
Alloying Element ◽  
X Ray ◽  
Heating And Cooling ◽  
Pin On Disc ◽  
Compacting Pressure

Because of the unique properties, Ni-Ti based shape memory alloys (SMAs) are increasingly attractive for a wide variety of engineering applications such as actuators, biomedical, or robot coupling. In this work, a third alloying element, namely nanoparticles of Ag (which is insoluble in Ni-Ti matrix), is added by powder technology to the Ni-Ti alloy to produce a Ni-Ti-Ag alloy. The Nanoparticles of the Ag element are added at 3, 5, 7, and 10 wt. % to produce four alloy specimens with different mixtures. The mixing process was done by a horizontal mixer for 120 min with a speed of 350 rpm, and then the mixture was compacted by using a compacting pressure of 600 MPa. Afterward, the compacted specimens were sintered at 600/min for 6 hrs. Scanning electron microscopy (SEM) and X-ray diffraction (XRD) were used to evaluate the microstructure and phases of the products. DSC examination was used to characterize the phase transformation temperatures in heating and cooling. Wear behavior was defined by using the pin-on-disc technique, and the hardness of the samples was calculated using Vickers's hardness apparatus. The results of this work showed that the nano-Ag added at 7 and 10 wt. % were distributed homogeneously in the Ni-Ti matrix, and that Ag slightly decreased hardness and increased the wear rate. The value of shape memory effect (SME) for the produced alloy was about 89.9% and the phase transformation in heating was at a temperature of about 186.48  and in cooling of about 140.3  for the specimen that contains 10 wt.% Ag nanoparticles.

Abrasive wear behavior of silane treated nanoalumina filled dental composite under food slurry and distilled water condition

2018 ◽  
Vol 25 (3) ◽  
pp. 541-553 ◽  
Author(s):  
Shiv Ranjan Kumar ◽  
Amar Patnaik ◽  
I.K. Bhat
Keyword(s):  
Wear Behavior ◽  
Normal Load ◽  
Filler Particle ◽  
Dental Composite ◽  
Dental Composites ◽  
Distilled Water ◽  
Steady State Condition ◽  
Weight Percentage ◽  
Three Body Abrasion ◽  
Three Body

AbstractThe aims of the present study were to develop a dental composite filled with silanized nanoalumina and then to investigate the effect of nanoalumina filler on the two-body and three-body wear behavior under distilled water and food slurry medium, respectively. The dental composites were fabricated by adding silane treated nanoalumina filler particle in the weight percentage of (0–3 wt.%) to the matrix of BisGMA, TEGDMA, CQ and EDMAB. Two-body and three-body wear tests were performed in dental wear simulator machine with varying parameters such as normal load, chewing speed and chamber temperature in such a way as to simulate mastication process. Taguchi’s orthogonal array (L16) design, steady state condition and ANOVA were applied to evaluate the optimum parameter for minimum wear and effect of each parameter on the wear performance of dental composites. The finding of the result indicated that mean volumetric wear rate of dental composite in distilled water (i.e. two-body abrasion) was 33.23% more than that of the same composite in food slurry condition (i.e. three-body abrasion).

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