CAJ | 학술논문

采用往复滑动磨损试验机评价凹凸棒石黏土天然矿物材料作为润滑油添加剂的摩擦学性能，利用4因素3水平正交试验方法系统研究摩擦过程中载荷、往复频率、滑动时间和凹凸棒石黏土含量对其作为添加剂的抗磨、减摩性能的影响。摩擦过程中，通过原位测量摩擦表面接触电阻的变化，监测凹凸棒石黏土形成摩擦反应膜的动态形成过程。摩擦学试验结束后，利用扫描电镜(SEM)和 X 射线能谱仪(EDS)分析磨损表面的形貌与元素组成，探讨凹凸棒石黏土添加剂的减摩润滑机理。结果表明，表面修饰棒状凹凸棒石黏土天然矿物材料作为润滑油添加剂具有优良的摩擦学性能，含凹凸棒石粉体润滑油作用下的摩擦表面形成了一层富含 Si、Mg、Al、O 等元素的不导电摩擦反应膜，并分布大量纳米尺度的硅酸盐颗粒物，从而显著降低摩擦，减少磨损。摩擦过程中载荷、往复频率、摩擦时间和凹凸棒石添加量4个因素对凹凸棒石添加剂减摩和抗磨性能影响的主次顺序均为：载荷＞添加量＞往复频率＞时间。
채용왕복활동마손시험궤평개요철봉석점토천연광물재료작위윤활유첨가제적마찰학성능，이용4인소3수평정교시험방법계통연구마찰과정중재하、왕복빈솔、활동시간화요철봉석점토함량대기작위첨가제적항마、감마성능적영향。마찰과정중，통과원위측량마찰표면접촉전조적변화，감측요철봉석점토형성마찰반응막적동태형성과정。마찰학시험결속후，이용소묘전경(SEM)화 X 사선능보의(EDS)분석마손표면적형모여원소조성，탐토요철봉석점토첨가제적감마윤활궤리。결과표명，표면수식봉상요철봉석점토천연광물재료작위윤활유첨가제구유우량적마찰학성능，함요철봉석분체윤활유작용하적마찰표면형성료일층부함 Si、Mg、Al、O 등원소적불도전마찰반응막，병분포대량납미척도적규산염과립물，종이현저강저마찰，감소마손。마찰과정중재하、왕복빈솔、마찰시간화요철봉석첨가량4개인소대요철봉석첨가제감마화항마성능영향적주차순서균위：재하＞첨가량＞왕복빈솔＞시간。
Tribological properties of attapulgite natural mineral powders as lubricating oil additive were studied in the present paper. The orthogonal test design was adopted in tribological tests to research the effects of the four main factors including the applied load, reciprocating frequency, sliding time and concentration of solid powders in oil, on the anti-wear and friction reducing behaviors of attapulgite powders. The contact electric resistance between the tribopairs was measured during sliding to monitor the formation of tribofilm by attapulgite additive. The tribological mechanisms of attapulgite powders as lubricating oil additive were discussed based on the scanning electronic microscope (SEM) and energy dispersive X-ray spectroscopy (EDS) analysis of the worn surfaces. The results indicate that using surface-modified attapulgite powders as lubricating oil additive present excellent tribological properties. A nonconducting tribofilm, containing elements of Si, Mg, Al and O, and on which nano-scale silicate particles are distributed, is found on surface under the lubrication of oil with attapulgite powders. The formation of the tribofilm contributes to the good antiwear and friction-reducing properties. The pecking order about the effects of the four main factors (including the applied load, reciprocating frequency, sliding time and concentration of the solid powders in oil) on the tribological behaviors of the rod-like attapulgite particles as lubricating oil additive is applied load, reciprocating frequency, sliding time and concentration.