Tribological Properties of Self-lubricating Laminated Ceramic Materials
来源期刊：Journal Of Wuhan University Of Technology Materials Science Edition2014年第5期
论文作者：宋培龙 杨学锋 WANG Shouren YANG Liying
文章页码：906 - 911
摘 要：In order to improve the tribological properties of ceramic composites, Al2O3/TiC-Al2O3/TiC/Ca F2 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/Ca F2 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/Ca F2 self-lubricating laminated ceramic composites have good wear resistance because of the tribofilm formed by the Ca F2 solid lubricants. The wear mechanisms of Al2O3/TiC/Ca F2 layers are abrasive wear and Al2O3/TiC layers are adhesive wear.
宋培龙，杨学锋，WANG Shouren，YANG Liying
School of Mechanical Engineering, University of Jinan
摘 要：In order to improve the tribological properties of ceramic composites, Al2O3/TiC-Al2O3/TiC/Ca F2 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/Ca F2 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/Ca F2 self-lubricating laminated ceramic composites have good wear resistance because of the tribofilm formed by the Ca F2 solid lubricants. The wear mechanisms of Al2O3/TiC/Ca F2 layers are abrasive wear and Al2O3/TiC layers are adhesive wear.
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