Tribological Behavior of Composite Materials - A Review

2010 ◽  
Vol 1 (2) ◽  
pp. 123-128
Author(s):  
Mohammad A. Chowdhury ◽  
Dewan M. Nuruzzaman ◽  
Mohammad L. Rahaman
Keyword(s):  
Composite Materials ◽  
Tribological Behavior

The Influence of Selected Powder Fillers on the Tribological Properties of Composite Materials for Dental Fillings

2008 ◽  
Vol 144 ◽  
pp. 33-38 ◽  
Author(s):  
Joanna Mystkowska ◽  
Jan Ryszard Dąbrowski
Keyword(s):  
Composite Materials ◽  
Tribological Properties ◽  
Tribological Behavior ◽  
Organic Matrix ◽  
Friction Modifiers ◽  
Dental Fillings ◽  
Ptfe Composite ◽  
Materials Used ◽  
Glass Fillers ◽  
Wear Tests

The aim of this study was to determine the influence of powder fillers on the tribological properties of composite materials used for dental fillings. The investigated composites contain a fluoridated filler (based on Ba-Sr-Al-P-Na-silicate glass fillers) as a fluoride source as well as different powder fillers (friction modifiers) e.g. silicon nitride (Si3N4), boron nitride (BN), polyethylene (PE), polytetrafluoroethylene (PTFE). Composite disks were photo-cured and tested for wear against harder stainless-steel counterface. Wear tests were carried out by means of special tribotester in the presence of phosphate buffer as a lubricant. Influence of the load and filler contents on the friction coefficients and wear were estimated. The interaction between the filler particles and organic matrix and its influence on the tribological behavior of prepared specimens were observed. Organic powder fillers (PE, PTFE) reduced the friction coefficient and the wear of tested composite materials for dental fillings. Inorganic friction modifiers (Si3N4, BN) did not exhibit this effect.

Tribological behavior of dental restorative composites in chewable tobacco environment

2020 ◽  
Vol 234 (10) ◽  
pp. 1106-1112
Author(s):  
Abhijeet S Suryawanshi ◽  
Niranjana Behera
Keyword(s):  
Composite Materials ◽  
Smokeless Tobacco ◽  
Tribological Behavior ◽  
Artificial Saliva ◽  
Wear Test ◽  
Dental Composite ◽  
Loading Conditions ◽  
Wear Properties ◽  
Pin On Disk ◽  
Dental Restorative

This study investigates the effect of smokeless tobacco on the tribological properties of two commercially used dental composite materials: Tetric N-Ceram and Z350 Dentin shade. It is to evaluate the effect of smokeless tobacco on the wear properties of two dental composite materials after some stipulated period. The wear test was conducted on pin-on-disk tribometer in the presence of artificial saliva under different loading conditions of 10, 15 and 20 N. The pins of the dental composite material were immersed in tobacco solution. The tribological behavior was studied after 2 days, 3.5 days, 6 days, 15 days and 1 month which represented the real conditions for the contact of 1 week, 2 weeks, 1 month, 2 months and 5 months, respectively, between the dental material and the tobacco solution. Under different loading conditions, Z350 Dentin material exhibited much less wear than the Tetric N-Ceram material in the presence of synthetic saliva for the specimen with or without tobacco immersion. The microstructure of the pin surface was inspected using scanning electron microscopy.

Tribological Behavior of Composite Materials - A Review

2008 ◽  
Vol 1 (2) ◽  
pp. 123-128
Author(s):  
Mohammad Chowdhury ◽  
Dewan Nuruzzaman ◽  
Mohammad Rahaman
Keyword(s):  
Composite Materials ◽  
Tribological Behavior

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.

Composite materials: Radar shields

Nature China ◽  
2007 ◽  
Author(s):  
Tim Reid
Keyword(s):  
Composite Materials
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