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

Abstract

The wear behavior of polyamide (PA6) matrix composites lled with silica particles is discussed in this paper. The tribological characteristics of pure PA6 and 5, 10, 30 wt% silica (SiO2) lled 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 coecient of the PA6 matrix even though the content of the llers was 530% by weight. The friction coecient 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 lled 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.

Applied Research of Applicability of High-Strength Steel for a Track of a Demining Machine in Term of Its Tribological Properties

“…Nowadays, there are several methodologies of experimental wear assessment [4,[31][32][33][34]. The mechanical properties of the materials are closely related with the working environment.…”

“…It is known that the wear process itself takes place in several layers, which form the surfaces of rigid bodies. According to more authors [2][3][4], physical effects during the mechanical wear process significantly affect the change of a structure as well as the change of external and internal factors (change of roughness and surface condition, heat generation and transfer, change of mechanical properties, concentration of dislocations, etc. ).…”