Abstract
Abstract. Drilling carbon fiber reinforced silicon carbide composites still forms a big challenge for machining because of their special braided structure and anisotropy. In this study, through the drilling of 2D Cf∕C–SiC composites, two kinds of brazed diamond core drills with different abrasive distributions were compared. The results showed that the drilling force and torque of the two drills decreased with the increase in the spindle speed and increased with the increase in the feed speed. Under the same drilling conditions, the drilling force and torque of the brazed diamond drill with the ordered abrasive distribution were far lower than those of the brazed diamond drill with the random abrasive distribution. Also, the quality of the holes drilled by the drill with the ordered abrasive distribution was better than that of the holes drilled by the drill with the random abrasive distribution, which is attributed to the uniform abrasive spacing provided by the drill with the ordered abrasive distribution.
Highlights
Carbon fiber reinforced silicon carbide (Cf/C–SiC) is a ceramic matrix composite with silicon carbide as the matrix and carbon fiber as the reinforcement
In drilling, cemented carbide, high-speed steel, and other drilling tools are widely used as traditional tools (Wang et al, 2013; Xing et al, 2017); the drilling quality of carbon fiber reinforced ceramic matrix composites is very poor
Due to the high hardness and brittleness of 2D Cf/C–SiC composites, carbon fiber tearing and delamination can occur in drilling processes
Summary
Carbon fiber reinforced silicon carbide (Cf/C–SiC) is a ceramic matrix composite with silicon carbide as the matrix and carbon fiber as the reinforcement. Due to its low density, high-temperature oxidation resistance, corrosion resistance, and other excellent mechanical properties, it has been widely used in the aerospace industry, braking systems, precision parts, and other fields (Singh et al, 2012; Mei et al, 2014; Zhang et al, 2011). It is a new type of high-temperature structural material and functional material that can meet the high-temperature requirement of 1650◦ (Wang et al, 2012; Yu et al, 2013). A useful guideline which has important scientific and practical significance can be provided to optimize their structures and processability
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