Papers by Keyword: Tribological

Abstract: In order to enhance diverse composites and foster sustainable development, it is essential to use strategic measures. Microcrystalline cellulose (MCC) has the desirable characteristics of being both renewable and biodegradable. The characteristics above provide MCC with a favorable option for enhancing the structural integrity of composite materials. This study examines the literature on using MCC as a composite reinforcement to identify its primary characteristics. This evaluation explores the properties and potential future advancements of the naturally derived materials under investigation. This work comprehensively reviews scientific publications to guide future research efforts. Based on empirical investigations, using MCC as a composite reinforcement has enhanced various mechanical and tribological characteristics. This study provides a comprehensive reference for implementing sustainable MCC as a composite reinforcement.

Abstract: Due to the huge impact of temperature on mechanical and tribological properties of polymer composites, polyimide composites reinforced with glass fiber and aramid fiber were fabricated. The composites were treated by the alternate temperature from-50 °C to 150 °C with 200 cycles. The comparation of the test results were analyzed and discussed before and after alternate temperature treatment.

Abstract: A carbon fibre (CF) in the form of a rod (continuous fibre) was used as reinforcement due to its superior strength and modulus properties. Carbon fibre rod reinforced aluminium 6061 alloy metal matrix composite material was synthesized using the stir casting liquid metallurgy route. Aluminium based metal matrix composite materials are light in weight. Very few researchers were worked on carbon fibre rod reinforced metal matrix composites (MMC). Electroless nickel deposition on carbon fibre rods (2mm and 3mm diameter) were carried out for improvement in wettability. On carbon fibre rods, the effectiveness of electroless nickel coating was validated using SEM (scanning electron microscopy) and EDAX (Energy Dispersive X-Ray Spectroscopy) analysis. A further coating thickness of nickel was improved using nickel electroplating. In a cast iron mould, nickel-coated carbon fibre rods were arranged in a circular pattern. Completely degassed molten aluminium 6061 alloy was poured in cast iron mould at 600-700 °C. The enhancement in Tribological and mechanical properties is always a prerequisite for technological advancement in automobile sector. From synthesized composites (11.11% Vol. CF and 25% Vol. CF reinforcement) specimen were prepared for density tests, bulk and microhardness tests, friction and wear tests. Synthesized composite has low density, increased bulk and microhardness, low coefficient of friction and reduced wear rate in comparison with aluminium 6061 alloy. Keywords: Carbon Fibre (CF) rod, MMC, Nickel coating, Casting, Mechanical, Tribological

Abstract: Surface modification with plasma has been widely applied to polymeric materials. This treatment is intended to improve the surface properties of the polymer including its wettability and adhesiveness. The aim of this paper is to provide a review of the literature on the surface treatment of polymers with plasma, which focuses on the effects of adhesive and surface tribology properties. The related surface properties are also reviewed in order to strengthen the review of adhesive properties and tribology. Various types of plasma treatments that have been reviewed reported that plasma can be effectively used to improve surface properties, especially adhesive and tribological properties. On a small surface treatment has been developed plasma jet treatment which has been widely applied in biomedical applications.

Abstract: Surface modification of silumin of the grade AK12 with plasma formed during an electrical explosion of aluminum foil with a sample of yttrium oxide powder placed in the explosion region (the electroexplosive doping method) is carried out. The thermodynamic analysis of the system Al-Si-Y-O is carried out. The phases formed in this system under equilibrium conditions are revealed. Investigations of the elemental and phase composition and the defective substructure are carried out. Mechanical (microhardness) and tribological (wear resistance and friction coefficient) tests of the modified material are performed. The physical mechanisms responsible for multiple enhancement of surface properties of the modified silumin samples are revealed.

Abstract: The tribological behaviour of hybrid aluminium matrix composites (AMCs) A356 reinforced with SiC , Gr and Tin particulate, fabricated by powder metallurgy route. In this experimental study, the mechanical and tribological properties are investigated. The results show that addition of more reinforcements reduce the hardness and also increase the wear rate of the composites. The addition of Gr beyond certain limit will decrease hardness and that of SiC will increase brittleness. In the hybrid composite with 15% weight SiC and 5% weight Gr reinforcement results show that great improvement under tribological condition. The wear loss of the hybrid composites decreased with increasing applied load and sliding distance. The SEM analysis shows the wear tracks results of the composite materials.

Abstract: Surface interaction is now one of the important engineering problems and methodologies to minimize wear can save large sums of money for repairing the machine parts. We try to minimize the number of experiment about the relations of normal load, lateral force, rotation speed, and resistance by grey theorem. Based on this, GM(1,1) model and RGM(1,1) model are constructed to predict the resistance under different controlled variables. And local grey analysis is for finding the degree of these variables affecting the value of resistance. Moreover, residual test is used to estimate the precision of the prediction. Results show that two models have good performance for prediction about 94% more accuracy. As for grey relation analysis, normal force is the most important variable to affect the resistance value. It also finds that increasing normal stress causes more friction loss of the parts. Since grey prediction has good performance in this study, we will combine Taguchi method and grey methodology to do more detail research on other tribological problems in the forth coming papers. Keywords: Tribological, Grey Theorem, Experiment Factors.

Abstract: This project investigated the tribological properties and nanomechanics of Cu-benzotriazole (BTA) composite nanooils. Cu-BTA nanoparticles were synthesized by a thermal decomposition process. Cu-BTA nanoparticles were added into paraffin oil to form the nanooils. Cu-BTA explores the nanomechanics of sphere geometry functions as a rolling medium for friction lower. BTA nanoparticles functions as a protector from oxidation of the Cu nanoparticles in various test circumstances. Tribological experiments were conducted using a pin-on-disk (ASTM G99) test for the wear scar diameter, friction coefficient, and morphology of worn surfaces. The experiment results revealed the dispersion capability of the benzotriazole-capped Cu nanoparticles and indicated the dispersing stability in liquid paraffin oil for the BTA-capped surface of Cu nanoparticles. The testing results show that the Cu-BTA nanoparticle used as an additive in paraffin oil at an appropriate concentration exhibits better tribological properties than those of pure paraffin oil. Cu-BTA functioning as an additives have different anti-wear abilities due to its small size effect and a high absolute viscosity given high Herser number, corresponds to relatively thick lubricant film and an larged elastohydrodynamic lubrication area. A thin film or powder consisting of spherical Cu-BTA nanoparticles on pin-on-disk (ASTM G99) test iron surface protests against damage from relative rolling movement, which reduces friction and wear.

Abstract: The paper represents the results of investigations conducted on the tribological test for the conditions of the friction of technically dry. Analysis stereological counter-specimen was subjected from AOC and AOC modified sealed up the polymers that is composites coats. Polymerization occurred at a temperature below the recrystallization temperature of the alloy EN AW 5251. The values of the coefficient of the friction, and the results of investigations AFM (atomic force microscopy) and the parameters of the roughness were compared. The tribological properties composites are investigated by using the pin-on-disk type rotational wear tester T-01 M. This paper shows models 3D of the AOC modified polymer and the mechanism of wearing. Tribological measurements show reduced wear and friction of the composite coatings as compared with the pure anodic oxide

Abstract: Different contents of carbon fiber were employed as reinforcement for Polyoxymethylene (POM) composite. All filled and unfilled POM composites were tested against CGr15 ball and representative testing was performed. The effects of carbon fiber content on tribological properties of the POM composites were investigated. The worn surface morphologies of pure POM and its composites were examined by scanning electron microscopy (SEM) and the wear mechanisms were discussed. Results show that all filled polyimides have superior tribological characteristics to unfilled ones. The optimum wear reduction was obtained when the content of carbon fiber is 15vol%.