Abstract
A new friction counterpart for carbon fiber-reinforced silicon carbide ceramic-matrix composites (C/SiCs) and zirconia (ZrO2) toughened by magnesia ceramics is proposed. The effects of the C/SiC surface processing parameters friction on the tribological performance are investigated under dry friction and ambient temperature conditions. The wear tests are carried out using the pin-on-disc friction method. Scanning electron microscopy (SEM) on an instrument equipped with an energy dispersive spectroscopy (EDS) is used to observe the surfaces of the pins and discs before and after the application of friction to reveal the wear mechanism. The results show that surface processing influenced the tribological properties of C/SiC significantly. When the pressure is 30 N, the speed is 0.5 m/s, and the C/SiC surface is ground using 1500# sandpaper, the counterpart tribological performance is the best among the samples considered herein. It is found that the retention ability of the counterparts influenced the tribology performance significantly.
Highlights
The rapid technological development in the aerospace field has resulted in increasingly severe working conditions for structural components[1,2]
Fiber-reinforced ceramic-matrix composites (FRCMCs) have promising applications in the aerospace field owing to their good adaptability and stability in harsh environments[5]
It is assumed that a friction pair composed of C/SiC and ZrO2 has excellent high temperature and wear resistance
Summary
The rapid technological development in the aerospace field has resulted in increasingly severe working conditions for structural components[1,2]. Fiber-reinforced ceramic-matrix composites (FRCMCs) have promising applications in the aerospace field owing to their good adaptability and stability in harsh environments[5]. They have an improved toughness because of the reinforcing fibers and a high hardness and excellent temperature resistance owing to the ceramic matrix and have other excellent properties (e.g., corrosion and wear resistance, good thermal capacity and dimensional stability, light weight, and insensitivity to cracks) due to the synergistic effect of the fibers and matrix[6,7,8,9,10]. Among the FRCMCs, carbon fiber-reinforced silicon carbide ceramic-matrix composites (C/SiCs) have received special attention because of their excellent temperature and wear resistance. The aim is to reveal the friction and wear mechanisms of this counterpart in detail to expand its application field
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