含碳纳米管二相流体润滑剂对钢-钢接触疲劳性能的影响  

Effect of Carbon-Nanotube-Containing Biphase Liquid Lubricant on Contact Fatigue Performance of a Steel-Steel Pair

作　　者：宋宝玉[1] 曲建俊[1] 张锋[1] 殷玉龙[1] 齐毓霖[1] 

机构地区：[1]哈尔滨工业大学机电工程学院,黑龙江哈尔滨150001

出　　处：《摩擦学学报》2003年第6期541-545,共5页Tribology

基　　金：航天创新基金资助项目(HTCX0006);黑龙江省自然科学基金资助项目(E01-16).

摘　　要：制备了含碳纳米管的二相流润滑剂,利用自制的球-棒疲劳试验机研究了碳纳米管对钢球接触疲劳寿命的影响;利用扫描电子显微镜分析了碳纳米管抗滚动接触疲劳机理.结果表明:与基础油相比,含1%质量分数碳纳米管的二相流体润滑剂可以使钢球的接触疲劳寿命L10提高3倍以上;当碳纳米管含量增加到3%时,钢球的接触疲劳寿命基本保持不变;利用微粒吸附模型和微粒垫衬模型可以较好地解释碳纳米管提高钢球接触疲劳寿命的原因.Carbon nanotube was used as an additive in 10# machine oil. The effect of the carbon nanotube as the additive on the contact fatigue behavior of an SAE52100-SAE52100 steel pair was investigated. Thus the lubricants to be tested were prepared by dispersing selected mass fraction of the nanotubes into the 10# machine oil in the presence of ultrasonic vibration. The contact fatigue behavior of the steel pair lubricated with the base oil and the additive-doped base oil was examined on a ball-on-rod fatigue tester. The pit-corroded surface of the steel pair was analyzed by means of scanning electron microscopy and energy dispersive spectrometry, while the action mechanisms of the carbon nanotubes were discussed with respect to particle adsorption model and particulate filling-up model. It was found that the carbon nanotube as the additive in the 10# machine oil contributed to significantly increase the fatigue life of the steel-steel pair. This was attributed to the ball bearing rolling effect of the carbon nanotube and its entrapment in the crack of the steel, which functioned to reduce the friction and restrain the crack propagation, respectively, and hence to improve the contact fatigue performance of the steel-steel pair. Moreover, the steel-steel pair had almost the same fatigue life under the lubrication of the base oil containing 1 wt.% or 3 wt.% carbon nanotubes, which might be related to the saturated adsorption of the nanotubes on the sliding steel surface or in the pit-corroded cracks of the steel surface.

关 键 词：碳纳米管 二相流体润滑剂 接触疲劳 

分 类 号：TH117.3[机械工程—机械设计及理论]