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Influence of Load and Speed on Sliding Tribology of Silica-Polyamide Composites against AISI 4140 Steel

100%
Akinci A.
Acta Physica Polonica A
|
2014
|
vol. 125
|
issue 2
478-480
EN
The wear behavior of polyamide (PA6) matrix composites filled with silica particles is discussed in this paper. The tribological characteristics of pure PA6 and 5, 10, 30 wt% silica (SiO_2) filled PA6 composites were comparatively evaluated under dry sliding conditions. Wear tests were carried out at room temperature under the loads of 5, 10, and 20 N and at the sliding speeds of 0.5, 1.0, and 1.5 m/s. The wear test results showed that the silica particles could improve the wear resistance and the friction coefficient of the PA6 matrix even though the content of the fillers was 5-30% by weight. The friction coefficient of the PA6 was getting decreased from 0.420 to 0.213 with an increase in silica content, depending on applied loads and sliding speeds. The results showed that the wear rates of pure PA6 and silica filled PA6 composites increase with increase in loads. The wear rate of the PA6 decreased from 4.2×10^{-6} mm^3/m to 6.0 × 10^{-7} mm^3/m with an increase in silica content depending on applied loads. This makes it possible to develop novel type of polyamide-based composite with improved wear resistance for various applications.
2
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The Effect of Sliding Motion on Tribological Characteristics of PA6 and Zinc-Borate Reinforced PA6 Composites

100%
Akinci A.
Acta Physica Polonica A
|
2014
|
vol. 125
|
issue 2
475-477
EN
The tribological characteristic of pure polyamide (PA6) and 2.5%, 5% zinc borate (Zn_3BO_6) filled (by wt) polyamide composites were comparatively evaluated under dry sliding conditions. Wear tests were carried out at room temperature under the loads of 5, 10, and 20 N, and at the sliding speeds of 0.5, 1.0, and 1.5 m/s. The coefficients of friction of the materials were significantly influenced by an increase in zinc borate content. The friction coefficient of the PA6 was getting decreased from 0.420 to 0.188 with an increase in zinc borate content, depending on applied loads and sliding speeds. The results showed that the wear rates of pure PA6 and zinc borate filled polyamides increased with increase in loads. The wear rate of the PA6 decreased from 4.2 × 10^{-6} mm^3/m to 5.0 × 10^{-7} mm^3/m with an increase in zinc borate content depending on applied loads.
3
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Tribological Behaviors of SiO_2 Added Polyester Matrix Thermosetting Composites

51%
Akinci A., Ozsoy M., Firat M., Sen U.
Acta Physica Polonica A
|
2014
|
vol. 125
|
issue 2
560-562
EN
In this study, the tribological behavior of polyester matrix composites filled with silicon dioxide (SiO_2) particles is investigated. The tribological characteristics of pure polyester and 10, 20, 30 and 40 wt% SiO_2 filled polyester composites were comparatively evaluated under dry sliding conditions. Wear tests were carried out at room temperature under the loads of 10, 20, and 30 N at the sliding speed of 1 m/s. The wear test results showed that the SiO_2 particles could improve the wear resistance. The friction coefficient of the polyester was getting increased from 0.228 to 1.1052 with an increase in SiO_2 content depending on applied loads. The results showed that the wear rates of pure polyester and SiO_2 filled polyester composites increased with increase in loads. The wear rates of the SiO_2 filled polyester composites were significantly affected from the SiO_2 content. The wear rate of the polyester changed from 8.0 × 10^{-7} mm^3/m to 1.72 × 10^{-5} mm^3/m depending on SiO_2 contents and applied loads.
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