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纳米镍粉在液压油中的分散及其摩擦学性能研究
Dispersion and Tribological Properties of Nano-nickel Powders in Hydraulic Oil
黄俊杰,张振忠,赵芳霞,武黎明
点击:48次 下载:0次
作者单位:南京工业大学 材料科学与工程学院
中文关键字:液压油;纳米镍粉;分散;摩擦学性能
英文关键字:hydraulic oil; nano-Ni powders; dispersion; tribological property
中文摘要:在研究了不同粘度等级传统液压油摩擦学性能及其载荷特性的基础上,本文采用高速剪切和纳米镍粉表面修饰相结合的分散方式制备含纳米镍粉的液压油,研究了超声时间、分散剂种类及加入量、高速剪切转速和时间对80 nm镍粉在液压油中分散性能的影响,并采用四球试验机研究了纳米镍粉加入量对46号及68号液压油摩擦学性能的影响。结果表明:添加8 wt%的硅烷偶联剂KH-560+甲基硅油,先超声15 min,然后以3000 rpm转速、高速剪切20 min时,纳米镍粉在液压油中的分散效果最好,稳定性最好,摩檫学性能最优;在392 N的载荷下粘度等级为46的液压油中镍粉加入量为0.25 wt%,粘度等级为68的液压油中镍粉加入量为0.05 wt%时综合摩擦学性能较好,摩擦系数和磨斑直径较基础液压油分别降低了29.3%和9.4%;30.8%和22.9%。
英文摘要:The experiment studied the tribological properties of different viscosity traditional hydraulic oil under different loads as a blank control group. 80nm nickel powder dispersed in hydraulic oil by high-speed shearing and surface modifying in the experiment. The effects of ultrasonic time, type of dispersant, quantity of addition, high-speed shearing time and rotational speed on dispersion performance were studied. A four-ball tester was used to evaluate the tribological properties of 46#&68# hydraulic oil under different nano nickel powder additive quantity in the experiment. The experimental results showed that the optimum technological condition for the dispersion of 80nm nano-nickel powder in hydraulic oil was: 5wt% of KH-560 + methyl silicone oil(1:1), 15mins ultrasound time, 2000rpm high-speed shearing speed and 20mins high-speed shearing time. The dispersion effect, stability and tribological properties of nano-nickel powder in hydraulic oil were the best in this technological condition. Under the load of 392N, 46# hydraulic oil showed the best tribological property at 0.25wt% nano-nickel powder addition, the friction coefficient and wear diameter relative blank control group was reduced by 29.3% and 29.3%. Under the same load, 64# hydraulic oil showed the best tribological property at 0.05wt% nano-nickel powder addition, the friction coefficient and wear diameter relative blank control group was reduced by 30.8% and 22.9%.
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国内统一连续出版物号:61-1134/TG |国内发行代码:52-64 |国际标准出版物号:1000-8365 |国际发行代码:M855
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