Tribological Performance of Iron Ore Tailings Enhanced Resin Composites for Automotive Brake Linings

2011 ◽  
Vol 189-193 ◽  
pp. 4387-4390
Author(s):  
Gui Hua Hou ◽  
Zhan Hong Wang
Keyword(s):  
Composite Materials ◽  
Friction And Wear ◽  
Iron Ore ◽  
Resin Composites ◽  
Wear Properties ◽  
Molding Method ◽  
Iron Ore Tailings ◽  
Friction And Wear Properties ◽  
Automotive Clutch ◽  
Automotive Brake

Iron tailings is the bulk waste produced by steel plants that has not yet been used. In this study, the mineral composition of iron tailings was determined by XRD. The microstructure was observed by SEM-BEI. Resin-based composite materials with different contents of iron tailings were prepared by compression molding method and the tribological properties of the composites were studied. The results showed that: when the contents of iron tailings were 10%, 20%, 30%, 40% and 50%, the friction and wear properties of the resin-based composite materials can meet the standards for automotive clutch (GB/T 5764-1998). Among these samples, the sample with 20% iron tailings had the best performance. This paper provides a new way for the use of iron tailings.

scholarly journals Retraction Note to: Sintered Aluminum–Graphene Nano-Bio Composite Materials for the Medical Application

2021 ◽  
Author(s):  
Dapeng Duan ◽  
Baofeng Li ◽  
Parul Kumar Sharma ◽  
Monidipa Pramanik ◽  
Shashi B. Singh ◽  
...  
Keyword(s):  
Composite Materials ◽  
Medical Application ◽  
Sintered Aluminum

Sintered Aluminum–Graphene Nano-Bio Composite Materials for the Medical Application

2021 ◽  
Author(s):  
Dapeng Duan ◽  
Baofeng Li ◽  
Parul Kumar Sharma ◽  
Monidipa Pramanik ◽  
Shashi B. Singh ◽  
...  
Keyword(s):  
Composite Materials ◽  
Medical Application ◽  
Sintered Aluminum

scholarly journals SUBSTANTIATION OF APPLICATION FEATURES OF LIQUID MIXTURES FOR SCREENING OF ELECTROMAGNETIC FIELDS

2021 ◽  
Vol 3 (163) ◽  
pp. 239-243
Author(s):  
O. Tykhenko
Keyword(s):  
Electromagnetic Field ◽  
Composite Materials ◽  
Rheological Properties ◽  
Electromagnetic Fields ◽  
Iron Ore ◽  
Liquid Mixtures ◽  
Ultrahigh Frequency ◽  
Filler Concentration ◽  
Iron Ore Concentrate ◽  
Industrial Frequency

The protective and rheological properties of composite materials based on water-dispersed paint and iron ore concentrate were studied. Features of liquid mixtures application for shielding of magnetic field of industrial frequency and electromagnetic field of ultrahigh frequency were substantiated. The study of the protective characteristics and rheological properties of composite materials based on water-dispersed paint and iron ore concentrate indicates the possibility of their use for shielding electromagnetic fields of a wide frequency range. It was found that the efficiency of the composite material (total shielding coefficient and reflection coefficient of electromagnetic waves) depends on the dispersion of the shielding filler, so the particle size analysis of iron ore concentrate was performed. The analysis shows that the predominant size of iron-containing particles is 23‒24 μm, which is quite acceptable for their uniform distribution in the body of the matrix. Shielding protective material was made of water-dispersion paint with the addition of iron ore concentrate in weight quantities of 15, 30, 45, 60%. The shielding coefficients of the electromagnetic field of industrial frequency and ultrahigh frequency with different filler content were measured. It was found that if the concentration of filler exceeds 30%, both the rheological characteristics of the mixture and the shielding coefficients of electromagnetic fields are unsatisfactory. A dramatic increase in shielding coefficients occurs at a filler concentration of 40%. This mixture has acceptable adhesive properties. It was established that the shielding coefficients could be enhanced if the dispersion of the filler is increased, which will contribute to the stability of the colloidal mixture and improve the rheological properties.

scholarly journals Design of liquid composite materials for shielding electromagnetic fields

2021 ◽  
Vol 3 (6 (111)) ◽  
pp. 25-31
Author(s):  
Valentyn Glyva ◽  
Volodymyr Bakharev ◽  
Natalia Kasatkina ◽  
Oleg Levchenko ◽  
Larysa Levchenko ◽  
...  
Keyword(s):  
Electromagnetic Field ◽  
Composite Materials ◽  
Electromagnetic Fields ◽  
Electromagnetic Waves ◽  
Iron Ore ◽  
Dielectric Permeability ◽  
Wide Frequency Range ◽  
Protective Properties ◽  
Principles Of Design ◽  
Iron Ore Concentrate

This paper reports the principles of design and the examined protective properties of liquid materials for shielding the electric, magnetic, and electromagnetic fields over a wide frequency range. The materials were made on the basis of iron ore concentrate and a pigment additive, with water-dispersed and geopolymer paints used as a matrix. The tests of protective properties for the electrical and magnetic components of the electromagnetic field of industrial frequency showed that the electric field shielding coefficients at a concentration of the screening substance of 15−60 % (by weight) equaled 1.1−8.6; magnetic field – 1.2−5.3. The shielding coefficients of the material based on a water-dispersed paint are lower than those of a geopolymer one, which can be explained by the oxidation of an iron-containing component and a decrease in electrical conductivity. The shielding coefficients of the electromagnetic field with a frequency of 2.45 GHz are 1.2−7.9. The highest coefficients are inherent in the material with filler made of iron ore concentrate and titanium-containing pigment powder in a ratio of 1:1. To design materials with the required (predictable) protective properties, the relative magnetic, dielectric permeability of materials was calculated. It is shown that the obtained data are acceptably the same as the results from direct measurements of magnetic and dielectric permeability and could be used to calculate the wave resistance of the material and the predicted reflection coefficient of electromagnetic waves. Thus, there is reason to assert the need to build a database on the frequency dependence of effective magnetic and dielectric permeability in order to automate the design processes of composite materials with predefined protective properties.

Tribotechnical Properties of Sintered Aluminum Alloys

2014 ◽  
Vol 682 ◽  
pp. 9-13 ◽  
Author(s):  
N.M. Rusin ◽  
A.L. Skorentsev
Keyword(s):  
Wear Resistance ◽  
Composite Materials ◽  
Friction Coefficient ◽  
Aluminum Alloys ◽  
Low Friction ◽  
Frictional Behavior ◽  
Liquid Lubricant ◽  
Sintered Composite ◽  
Tribotechnical Properties ◽  
Sintered Aluminum

The frictional behavior of sintered composite materials based on aluminum with high content of solid intermetallics and soft tin was investigated. It was found that at the moderate pressures and in absence of a liquid lubricant, both types of composites exhibit a low friction coefficient and good wear resistance.

Comparative Microstructures of Ion Milled and Electrochemically Thinned Composite Materials

1974 ◽  
Vol 32 ◽  
pp. 546-547
Author(s):  
R.R. Russell
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Composite Materials ◽  
Great Difficulty ◽  
Ion Milling ◽  
Transmission Electron ◽  
Ion Damage ◽  
Intermetallic Composite

Transmission electron microscopy of metallic/intermetallic composite materials is most challenging since the microscopist typically has great difficulty preparing specimens with uniform electron thin areas in adjacent phases. The application of ion milling for thinning foils from such materials has been quite effective. Although composite specimens prepared by ion milling have yielded much microstructural information, this technique has some inherent drawbacks such as the possible generation of ion damage near sample surfaces.

Transmission electron microscopy of composite materials

1988 ◽  
Vol 46 ◽  
pp. 1012-1015
Author(s):  
K.P.D. Lagerlof
Keyword(s):  
Composite Materials ◽  
Physical Properties ◽  
Structural Defects ◽  
Structural Composites ◽  
Multiphase Materials ◽  
Structural Reinforcement ◽  
Transmission Electron ◽  
Reinforced Fiber ◽  
Particulate Reinforced Composites ◽  
Definition Of

Although most materials contain more than one phase, and thus are multiphase materials, the definition of composite materials is commonly used to describe those materials containing more than one phase deliberately added to obtain certain desired physical properties. Composite materials are often classified according to their application, i.e. structural composites and electronic composites, but may also be classified according to the type of compounds making up the composite, i.e. metal/ceramic, ceramic/ceramie and metal/semiconductor composites. For structural composites it is also common to refer to the type of structural reinforcement; whisker-reinforced, fiber-reinforced, or particulate reinforced composites [1-4].For all types of composite materials, it is of fundamental importance to understand the relationship between the microstructure and the observed physical properties, and it is therefore vital to properly characterize the microstructure. The interfaces separating the different phases comprising the composite are of particular interest to understand. In structural composites the interface is often the weakest part, where fracture will nucleate, and in electronic composites structural defects at or near the interface will affect the critical electronic properties.

Sign in / Sign up

Export Citation Format

Share Document