Study of Wear Properties of Vinyl Ester Polymer Filled with Micro-Gr-Nano-CuO Particles

Influence of Multiwall Carbon Nanotube on mechanical and wear properties of Copper – Iron composite

International Journal of Automotive and Mechanical Engineering ◽

10.15282/ijame.17.1.2020.06.0561 ◽

2020 ◽

Vol 17 (1) ◽

pp. 7570-7576 ◽

Cited By ~ 1

Author(s):

H. Sh. Hammood ◽

S. S. Irhayyim ◽

A. Y. Awad ◽

H. A. Abdulhadi

Keyword(s):

Carbon Nanotubes ◽

Volume Fraction ◽

Hybrid Composites ◽

Hydraulic Press ◽

Dry Sliding Wear ◽

Multiwall Carbon Nanotube ◽

Wear Properties ◽

Sem Images ◽

Wear Rates ◽

Multiwall Carbon

Multiwall Carbon nanotubes (MWCNTs) are frequently attractive due to their novel physical and chemical characteristics, as well as their larger aspect ratio and higher conductivity. Therefore, MWCNTs can allow tremendous possibilities for the improvement of the necessarily unique composite materials system. The present work deals with the fabrication of Cu-Fe/CNTs hybrid composites manufactured by powder metallurgy techniques. Copper powder with 10 vol. % of iron powder and different volume fractions of Multi-Wall Carbon Nanotubes (MWCNTs) were mixed to get hybrid composites. The hybrid composites were fabricated by adding 0.3, 0.6, 0.9, and 1.2 vol.% of MWCNTs to Cu- 10% Fe mixture using a mechanical mixer. The samples were compressed under a load of 700 MPa using a hydraulic press to compact the samples. Sintering was done at 900°C for 2 h at 5ºC/min heating rate. The microscopic structure was studied using a Scanning Electron Microscope (SEM). The effect of CNTs on the mechanical and wear properties, such as micro-hardness, dry sliding wear, density, and porosity were studied in detail. The wear tests were carried out at a fixed time of 20 minutes while the applied loads were varied (5, 10, 15, and 20 N). SEM images revealed that CNTs were uniformly distributed with relative agglomeration within the Cu/Fe matrix. The results showed that the hardness, density, and wear rates decreased while the percentage of porosity increased with increasing the CNT volume fraction. Furthermore, the wear rate for all the CNTs contents increased with the applied load.

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Functionalized Clay Vinyl Ester Nanocomposites

10.1557/proc-1143-kk05-22 ◽

2008 ◽

Author(s):

Dharmaraj Raghavan

Keyword(s):

Vinyl Ester

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In-Plane Bending and Shear Deformation of Belt Contributions on Tire Cornering Stiffness Characteristics

Tire Science and Technology ◽

10.2346/tire.20.190213 ◽

2020 ◽

Author(s):

Gibin Gil ◽

Sujin Lee

Keyword(s):

Mathematical Model ◽

Shear Deformation ◽

Beam Theory ◽

Slip Angle ◽

Wear Properties ◽

Angle Change ◽

Foundation Model ◽

Plane Bending ◽

Stiffness Characteristics ◽

Brush Model

ABSTRACT In radial tires, belt structure plays a role of minimizing the lateral deflection of carcass, which has a significant influence on the cornering and wear properties of a tire. The deflection of carcass affects the magnitude of tread block deformation when the tire is under the slip angle. As a result, it can change the cornering stiffness characteristics of the tire, especially when the vertical load is high. During tire development, a tire design engineer tries to find the optimal belt ply angle that satisfies the various performance requirements simultaneously, but it is not an easy task because the effect of belt angle change is different depending on the size of the tire. There have been many attempts to construct a mathematical model that represents the structural properties of the belt package, including the string-based model and the beam on elastic foundation model. But, in many cases, only the in-plane bending of belt is considered and the shear deformation is not taken into consideration. In this study, the effect of belt angle change on belt stiffness is analyzed using a mathematical model based on the Timoshenko beam theory. This model can account for the in-plane bending and shear deformation of the belt structure at the same time. The results of the analysis show how the contribution of bending and shear is changed depending on a tire design parameter, herein the belt cord angle. The effect of belt ply angle change on cornering stiffness is investigated by means of the brush model including belt flexibility. The prediction by the brush model is compared with the measurement using a Flat-trac machine, and the validity of the model is discussed.

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Effect of High Temperature on Wear Behavior of Stir Cast Aluminium/Boron Carbide Composites

Mechanics and Mechanical Engineering ◽

10.2478/mme-2018-0082 ◽

2020 ◽

Vol 22 (4) ◽

pp. 1031-1046

Author(s):

X. Canute ◽

M. C. Majumder

Keyword(s):

High Temperature ◽

Wear Rate ◽

Boron Carbide ◽

Wear Behavior ◽

Base Alloy ◽

Weight Fraction ◽

Sliding Velocity ◽

Wear Properties ◽

High Temperature Wear ◽

The Matrix

AbstractThe need for development of high temperature wear resistant composite materials with superior mechanical properties and tribological properties is increasing significantly. The high temperature wear properties of aluminium boron carbide composites was evaluated in this investigation. The effect of load, sliding velocity, temperature and reinforcement percentage on wear rate was determined by the pin heating method using pin heating arrangement. The size and structure of base alloy particles change considerably with an increase of boron carbide particles. The wettability and interface bonding between the matrix and reinforcement enhanced by the addition of potassium flurotitanate. ANOVA technique was used to study the effect of input parameters on wear rate. The investigation reveals that the load had higher significance than sliding velocity, temperature and weight fraction. The pin surface was studied with a high-resolution scanning electron microscope. Regression analysis revealed an extensive association between control parameters and response. The developed composites can be used in the production of automobile parts requiring high wear, frictional and thermal resistance.

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