Sliding Friction of Al-Cu-Fe-B Quasicrystals

Abstract

Abstract: Dry sliding friction between the Al¬59Cu¬25.5Fe¬12.5B¬3 quasicrystals (QCs)/coating of the diamond-like carbon (DLC) was carried out by self-made tribometer under different conditions. The influences of four parameters (temperature, sliding velocity, applied load, atmosphere) on friction and wear of quasicrystal surface were studied. Microstructure of quasicrystal, morphology of worn surface, and wear debris were observed by scanning electron microscopy (SEM). The results showed that for QCs, the friction coefficient and roughness of worn surface were influenced by the parameters, especially greatly by the temperature. With rise of the applied load and sliding velocity, the friction coefficient decreased. The dominant wear mechanism at 350℃ was delamination for QCs. The cracks formed on the worn surface during the friction. Moreover, phase transformation was not observed on worn surface of QCs at 350℃. All the results are discussed and explained.

Key words: Quasicrystal, Temperature, Friction

Xiying ZHOU, Peiyao LI, Junming LUO, Shiqiang QIAN, Jianhua TONG. Sliding Friction of Al-Cu-Fe-B Quasicrystals[J]. J Mater Sci Technol, 2004, 20(06): 709-713.

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