Abstract
In order to improve the tribological properties of ceramic composites, Al2O3/TiC-Al2O3/TiC/CaF2 self-lubricating laminated ceramic composites were prepared by vacuum hot pressing sintering. Experiments were conducted to get mechanical properties and the friction and wear properties were also measured with friction and wear tester. The worn surfaces were observed by scanning electron microscope (SEM) and energy dispersion spectrum (EDS). The wear resistance properties and the self-lubricating effect of ceramic composites were analyzed. Results show that the Al2O3/TiC-Al2O3/TiC/CaF2 self-lubricating laminated ceramic composites layers are well-defined with a higher bonding strength and the mechanical performances are uniform enough to overcome the anisotropy of weak laminated ceramic composites. In addition, the fracture toughness of Al2O3/TiC layers is also improved. Its friction coefficient and wear rates decrease with the increase of rotation speed and load. Al2O3/TiC-Al2O3/TiC/CaF2 self-lubricating laminated ceramic composites have good wear resistance because of the tribofilm formed by the CaF2 solid lubricants. The wear mechanisms of Al2O3/TiC/CaF2 layers are abrasive wear and Al2O3/TiC layers are adhesive wear.
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Funded by the National Natural Science Foundation for Young Scholars of China (No. 51005100) and Higher Education Science and Technology Program of Shandong(No. J11LD14), Science and Technology Development Plan of Shandong (No. 2012GGX10324)
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Song, P., Yang, X., Wang, S. et al. Tribological properties of self-lubricating laminated ceramic materials. J. Wuhan Univ. Technol.-Mat. Sci. Edit. 29, 906–911 (2014). https://doi.org/10.1007/s11595-014-1018-0
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DOI: https://doi.org/10.1007/s11595-014-1018-0