氧化铝/钼自润滑结构陶瓷表面三维复合润滑层的制备与摩擦学性能研究
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摘要
应用先进的激光表面加工技术,在Al_2O_3/Mo层状自润滑结构陶瓷表面制备了微坑型织构.将织构图案作为固体润滑剂的贮存槽,通过在其中引入固体润滑剂形成三维复合润滑层.考察了复配润滑剂对织构化氧化铝/钼复合陶瓷在室温至800℃连续加热过程中的协同润滑作用,并通过磨损表面分析探讨了其在宽温域下的润滑机理.结果表明:通过集成固体润滑剂优异的减摩抗磨性能和微织构特殊的结构特征,可使氧化铝/钼复合陶瓷在室温、中温区域的摩擦学性能得到显著改善,实现了材料在较宽温度范围内的连续润滑.复合Graphite/BaSO_4/CaF_2-BaF_2的表面在室温至800℃温度范围内的摩擦系数均保持在0.45以下.
Micro-textures of dimples were produced on the surfaces of Al_2O_3/Mo self-lubricating structural ceramics using laser surface processing. Taking surface textures as storage of solid lubricants, a three-dimensional lubricating layer was further prepared on the textured surfaces of Al_2O_3/Mo composites by burnishing mixed lubricants. The synergistic lubrication of mixed lubricants burnished on the textured surfaces of Al_2O_3/Mo composites from room temperature to 800 ℃ was investigated, and the lubrication mechanism was discussed by analysis of the worn surfaces.Results show that the lubricating layer combined excellent tribological properties of solid lubricants and special structure characteristics of micro-textures, which reduced the friction coefficients at room temperature and moderate temperature and further achieved continuous lubrication over a wide temperature range. The friction coefficients of surfaces burnished with Graphite/BaSO_4/CaF_2-BaF_2 were lower than 0.45 from room temperature to 800 ℃.
Micro-textures of dimples were produced on the surfaces of Al_2O_3/Mo self-lubricating structural ceramics using laser surface processing. Taking surface textures as storage of solid lubricants, a three-dimensional lubricating layer was further prepared on the textured surfaces of Al_2O_3/Mo composites by burnishing mixed lubricants. The synergistic lubrication of mixed lubricants burnished on the textured surfaces of Al_2O_3/Mo composites from room temperature to 800 ℃ was investigated, and the lubrication mechanism was discussed by analysis of the worn surfaces.Results show that the lubricating layer combined excellent tribological properties of solid lubricants and special structure characteristics of micro-textures, which reduced the friction coefficients at room temperature and moderate temperature and further achieved continuous lubrication over a wide temperature range. The friction coefficients of surfaces burnished with Graphite/BaSO_4/CaF_2-BaF_2 were lower than 0.45 from room temperature to 800 ℃.
引文
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[2]Deng J X,Liu L L,Yang X F,et al.Self-lubrication of Al2O3/Ti C/Ca F2 ceramic composites in sliding wear tests and in machining processes[J].Materials and Design,2007,28:757–764.
[3]Ouyang J H,Li Y F,Wang Y M,et al.Microstructure and tribological properties of Zr O2(Y2O3)matrix composites doped with different solid lubricants from room temperature to 800℃[J].Wear,2009,267:1353–1360.
[4]Zhang Y S,Hu L T,Chen J M,et al.Lubrication behavior of YTZP/Al2O3/Mo nanocomposites at high temperature[J].Wear,2010,268:1091–1094.
[5]Yi Mingdong,Xu Chonghai,Chen Zhaoqiang,et al.Effect of nanosized Ca F2 on mechanical properties of self-lubricating ceramic material[J].Journal of the Chinese Ceramic Society,2014,42:1127–1133(in Chinese)[衣明东,许崇海,陈照强,等.纳米Ca F2对自润滑陶瓷材料力学性能的影响[J].硅酸盐学报,2014,42:1127–1133].
[6]Yang Xinling,Wang Zichen,Li Fangni,et al.Microstructure and properties of silicon carbide/graphite composite ceramic seals[J].Journal of the Chinese Ceramic Society,2015,43:1686–1691(in Chinese)[杨新领,王子晨,李芳妮,等.碳化硅/石墨复合陶瓷密封材料的显微结构与性能[J].硅酸盐学报,2015,43:1686–1691].
[7]Qi Y E,Zhang Y S,Fang Y,et al.Design and preparation of highperformance alumina functional graded self-lubricated ceramic composites[J].Composites Part B-Engineering,2013,48:1–5.
[8]Fang Y,Zhang Y S,Song J J,et al.Design and fabrication of laminated-graded zirconia self-lubricating composites[J].Materials and Design,2013,49:421–425.
[9]Zhang Y S,Fang Y,Fan H Z,et al.High-performance ceramic lubricating materials,in:Wythers MC(editor),Advances in Materials Science Research Volume 17[M].New York:Nova Science Publishers Inc,2014:83–92
[10]Song J J,Zhang Y S,Su Y F,et al.Influence of structural parameters and compositions on the tribological properties of alumina/graphite laminated composites[J].Wear,2015,338-339:351–361.
[11]Su Y F,Zhang Y S,Song J J,et al.High-temperature self-lubricated and fracture properties of alumina/molybdenum fibrous monolithic ceramic[J].Tribology Letters,2015,61:1–7.
[12]Fang Y,Zhang Y S,Song J J,et al.Influence of structural parameters on the tribological properties of Al2O3/Mo laminated nanocomposites[J].Wear,2014,320:152–160.
[13]Song J J,Zhang Y S,Fang Y,et al.Influence of structural parameters and transition interface on the fracture property of Al2O3/Mo laminated composites[J].Journal of the European Ceramic Society,2015,35:1581–1591.
[14]Fan H Z,Zhang Y S,Hu T C,et al.Surface composition-lubrication design of Al2O3/Ni laminated composites—Part I:Tribological synergy effect of micro-dimpled texture and diamond-like carbon films in a water environment[J].Tribology International,2015,84:142–151.
[15]Fan H Z,Hu T C,Wan H Q,et al.Surface composition-lubrication design of Al2O3/Ni laminated composites—Part II:Tribological behavior of La F3-doped Mo S2 composite coating in a water environment[J].Tribology International,2016,96:258–268.
[16]Fang Y,Zhang Y S,Fan H Z,et al.Surface composition-lubrication design of Al2O3/Mo laminated composites—Part I:Influence of laser surface texturing on the tribological behavior at 25 and 800℃[J].Wear,2015,334-335:23–34.
[17]Fang Y,Fan H Z,Song J J,et al.Surface engineering design of Al2O3/Mo self-lubricating structural ceramics—Part II:Continuous lubrication effects of a three-dimensional lubricating layer at temperatures from 25 to 800℃[J].Wear,2016,360-361:97–103.
[18]Shan Yu,Liu Feng,Wang Jianyi,et al.High temperature tribological properties of Ni Cr W-Al2O3-Sr CO3-Ag cement composites[J].Tribology,2015,35:707–713(in Chinese)[陕钰,刘峰,汪建义,等.Ni Cr W-Al2O3-Sr CO3-Ag金属陶瓷复合材料的高温摩擦学性能研究[J].摩擦学学报,2015,35:707–713].
[19]Yan Shuping,Wei Raobin,Han Jiesheng,et al.Effect of the addition of Ti3Si C2 on mechanical and friction/wear properties of Ag-matrix composites[J].Tribology,2015,35:622–628(in Chinese)[闫淑萍,韦尧兵,韩杰胜,等.Ti3Si C2的加入对Ag-Mo S2-graphite复合材料力学及摩擦磨损性能的影响[J].摩擦学学报,2015,35:622–628].
[20]Xu Yufu,Hu Xianguo,Yu Huiqiang,et al.Lubrication performance and mechanism of bio-oils made from typical microalgae[J].Tribology,2014,34:291–296(in Chinese)[徐玉福,胡献国,俞辉强,等.典型微藻生物油的润滑性能和作用机理研究[J].摩擦学学报,2014,34:291–296].
[21]Wang Haizhong,Zeng Junling,Feng Dapeng,et al.Tribological behavior of Si3N4-Ti3Si C2 contacts lubricated by ionic liquids[J].Tribology,2013,33:537–542(in Chinese)[王海忠,曾俊菱,冯大鹏,等.离子液体作为Si3N4-Ti3Si C2摩擦副润滑剂的摩擦学性能研究[J].摩擦学学报,2013,33:537–542].