The Tribological Behaviors of Different Mass Ratio Al2O3-TiO2 Coatings in Water Lubrication Sliding against Si3N4
The Tribological Behaviors of Different Mass Ratio Al2O3-TiO2 Coatings in Water Lubrication Sliding against Si3N4
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DOI：
10.1080/10402004.2015.1079348
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发表时间：
2016-03
影响因子：
2.1
通讯作者：
Defa Wu;Yinshui Liu;Xufeng Zhao;Donglin Li;Xiaojun Ren
中科院分区：
文献类型：
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作者：
Defa Wu;Yinshui Liu;Xufeng Zhao;Donglin Li;Xiaojun Ren
摘要由于天然水体中的泥沙和水的润滑性差，水压柱塞泵的摩擦副通常在恶劣的工况下工作。确定设计水泵所需的工程材料和材料组合至关重要。作为摩擦副的候选材料，研究了不同Al 2 O3-TiO 2涂层与Si 3 N4陶瓷复合后在含沙水和自来水润滑条件下的摩擦学特性。测试了具有从3%至100%的宽范围的不同重量百分比的TiO 2的Al 2 O3-TiO 2涂层。利用环-环摩擦磨损试验机研究了不同摩擦副的摩擦学特性。采用扫描电镜对试验前后的接触表面进行了微观组织分析，研究了磨损机理。结果表明，随着涂层中TiO 2含量的增加，Al 2 O3-TiO 2/Si 3 N4摩擦副的摩擦系数增大。然而，TiO 2含量与磨损率并不存在明显的关系。考虑到摩擦磨损性能，Al 2 O3 -13%TiO2是用于水液压泵的首选涂层，当与Si 3 N4滑动时。
ABSTRACT The tribopairs of water hydraulic plunger pumps are usually operated under severe conditions, due to the poor lubrication of water and silt suspended in natural water. It is essential to identify the desired engineering materials and material combinations for designing water pumps. As the candidate materials of tribopairs, the tribological characteristics of different Al2O3-TiO2 coatings combined with Si3N4 ceramics under silt-laden water and tap water lubrication were investigated. The Al2O3-TiO2 coatings with different weight percentages of TiO2 in a wide range from 3 to 100% were tested. The tribological characteristics of the various couple pairs were researched using a ring-on-ring test rig. The microstructures of the contact surfaces were analyzed with a scanning electron microscope before and after the test to study the wear mechanism. The experimental results indicate that the friction coefficient of the Al2O3-TiO2/Si3N4 tribopairs increases with an increase in the percentage of TiO2 content in the Al2O3-TiO2 coating. However, the TiO2 content does not present a clear relationship with the wear rate. Considering the friction and wear properties, Al2O3-13%TiO2 is the preferred coating to use in water hydraulic pumps when sliding against Si3N4.