부산대학교 도서관

A new class of ceramic matrix composites based on Cr 2 AlC MAX-phase containing 5 and 10 wt.% of SiC fibers was developed in this investigation. The Cr 2 AlC/SiC composites were performed through two consecutives steps: i) synthesis of the pure Cr 2 AlC phase from its elemental constituents by reactive method under argon atmosphere at 1400 °C and particle size refinement, and ii) processing of Cr 2 AlC powder and SiC fibers followed by densification using the field assisted sintering technology/spark plasma sintering. Cr 2 AlC/SiC composites presented high density (98.6%) with an excellent dispersion of the fibers within the matrix and a strong matrix/fiber interfase. Tribological behavior of the developed composites was studied under dry conditions to reveal the role played by the SiC fibers. Incorporation of the SiC fibers within the Cr 2 AlC matrix reduced the friction coefficient up to 20% for low testing loads, while the wear resistance increased up to 70–80% independently of the applied load. [ABSTRACT FROM AUTHOR]