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Charakterystyki tribologiczne skojarzenia kompozyt polimerowy-brąz w podwyższonej temperaturze

Pawelec Z., Dasiewicz J.

Tribologia

2006

nr 5

131-140

W artykule przedstawiono charakterystyki tarciowo-zużyciowe kompozytu polimerowego na osnowie żywicy epoksydowej. Testy tribologiczne prowadzono za pomocą zmodernizowanej maszyny tribologicznej typu rolka-klocek, w podwyższonej temperaturze otoczenia węzła tarcia. Przedmiotem badań było skojarzenie, w którym rolka (próbka) z nałożoną i obrobioną mechanicznie warstwą kompozytu współpracowała z prostopadłościennym klockiem (przeciwpróbką) wykonanym z brązu, o geometrii styku w kształcie wycinka walca o polu 1 cm^2. Badania prowadzono w temperaturze otoczenia węzła tarcia 35, 40 i 60°C. Dokonano oceny wpływu podwyższonej temperatury otoczenia węzła tarcia na współczynnik tarcia i zużycie modelowego skojarzenia.

The paper presents wear and friction characteristics of chemicalsetting epoxy based regenerative composites. The tribological tests were performed using block-on-ring tribosystem working at elevated temperatures. The objective of the research was a ring (specimen) covered with a regenerative composite. After deposition the composite was machined. The block in shape of a with area of 1 cm^2 rubbed against the ring. The friction process were preformed at 35, 40 and 60°C. The effect of elevated temperature of friction pair on friction and wear were investigated.

The friction and wear characteristics and the deformation of bronze powder-filled PEEK/PTFE blends in oscillating motion

Takahashi H., Saito A.

International Journal of Applied Mechanics and Engineering

2002

Vol. 7, Spec. is

433-439

A study was made on polymer based composite materials, which are usable without lubrication as sliding members of oscillating motion components which are difficult to lubricate with oil. In this study, polyetheretherketone (PEEK) was used as a matrix, was blend with polytetrafluoroethylene (PTFE) which is a friction-reducing material. Friction and wear characteristics of each specimen in oscillating motion and continuous rotation were studied. As a result, the wear of pure PEEK in oscillating motion was about 20 times that in continuous rotation, but the wear of PTFE blended PEEK in oscillating motion was improved about 3 times that in continuous rotation. And the wear of PTFE blended specimens reduced to about 1/50 that of pure PEEK in oscillating motion and about 1/2 in continuous rotation. When PTFE blended PEEK was filled with bronze particles, wear was even further reduced in oscillating motion and also in continuous rotation. Coefficient of friction of pure PEEK in oscillating motion was greater than that in continuous rotation. When PEEK was blended with PTFE, coefficients of friction were reduced to such an extent as to eliminate differences in friction characteristics according to the direction of motion. Further, pv limits of pure PEEK in oscillating motion were extremely small compared to those in continuous rotation. When PEEK was blended with PTFE, pv limits were improved in oscillating motion and also in continuous rotation.