METAL MATRIX COMPOSITES CONTAINING A GLASSY CARBON PARTICLES USED TO WORK IN FRICTION CONDITIONS
Journal Title: Tribologia - Year 2010, Vol 234, Issue 6
Abstract
The results of the physicochemical properties of composite materials containing ceramic particles of carbon of amorphous structure are presented. The influence of the size and reinforcement value on tensile strength, impact, and tribological characteristics (the coefficient of friction and wear) were estimated. It was found that the reinforcement value primarily defines mechanical properties. The enlargement of particle values leads to the decreasing of tensile strengths and impact strengths. The research on the coefficient of friction proved, that an increase of the reinforcement value leads to a decrease in the coefficient of friction from 0.4 for 5% value to about 0.12 for 20% of particle value. It has been also proved that the size of particles has some influence on the coefficient of friction. The coefficient of friction is comparable for the composites containing particles of 200 μm size and has little dependence on the reinforcement value. The reason are the changes in surface area of composite, being the result of pulling out and crumbling out the reinforcement from the matrix.<br/><br/>
Authors and Affiliations
Jerzy Myalski, Jakub Wieczorek
Keywords
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