부산대학교 도서관

Tribological properties of AlCoCrCuFeNi high-entropy alloy were studied after annealing at various temperatures. X-raydiffraction, scanning electron microscopy, energy dispersive spectroscopy, microhardness tester and pin-on-disc tribometeranalyses were performed to reveal the microstructure, composition, microhardness and tribological behavior variations. Withthe heat treatment temperature increasing, time taken for friction coefficient going through the rapidly dropping down andthen into the stable period increases, the white sheets structures and their size in dendrite area of the AlCoCrCuFeNi alloybecomes bigger, however BCC content declined dramatically. Then, the average friction coefficient of the AlCoCrCuFeNi/Si3N4 sliding friction pair increase from 0.037 to 0.115, and the pin wear loss increase from 3 to 11 μm.