CAJ | 학술논문

以纳米凹土纤维为原料采用机械球磨法制备了一种摩擦改性剂，利用往复摩擦磨损试验机评价了其对碳钢摩擦副的润滑及原位修复作用，借助扫描电子显微镜(SEM)、能量色散谱仪(EDS)及纳米压痕仪(nano-indenter)对自修复层进行了表征，探讨了其减摩抗磨及自修复机理.结果表明，纳米凹土纤维具有优异的减摩抗磨性能且与载荷和速度的匹配有关；在50 N、1．0 m/s 时具有较低的摩擦系数及磨损率，分别较基础油降低约58％和81％.凹土纤维参与了摩擦表面复杂的理化作用，诱发形成了较为均匀连续的“多孔”修复层，厚约1．52μm；表面较为光滑平整，主要由 Fe、C、O、Si 及微量的 Mg、Al 元素构成，具有较高的纳米力学性能，有效地降低了摩擦磨损.
이납미요토섬유위원료채용궤계구마법제비료일충마찰개성제，이용왕복마찰마손시험궤평개료기대탄강마찰부적윤활급원위수복작용，차조소묘전자현미경(SEM)、능량색산보의(EDS)급납미압흔의(nano-indenter)대자수복층진행료표정，탐토료기감마항마급자수복궤리.결과표명，납미요토섬유구유우이적감마항마성능차여재하화속도적필배유관；재50 N、1．0 m/s 시구유교저적마찰계수급마손솔，분별교기출유강저약58％화81％.요토섬유삼여료마찰표면복잡적이화작용，유발형성료교위균균련속적“다공”수복층，후약1．52μm；표면교위광활평정，주요유 Fe、C、O、Si 급미량적 Mg、Al 원소구성，구유교고적납미역학성능，유효지강저료마찰마손.
A friction geometry modifier was prepared out of nanoscale attapulgite fibers using mechanical ball-milling method.The lubricating and in situ reconditioning effects of the as-prepared modifier on carbon steel tri-bopairs were evaluated by employing a reciprocating friction and wear tester.The mechanisms for friction and wear reducing and reconditioning effects were discussed based on the characterization of the self-reconditioning layer with scanning electron microscope (SEM),energy dispersive spectroscope (EDS)and nano-indenter.Re-sults show that the nanoscale attapulgite fiber has excellent friction and wear reducing performance associated with the match of the applied load and sliding velocity.Under the condition of 50 N and 1.0 m/s,the corre-sponding friction coefficient and mass wear rate reach the lowest value,and decrease by 58% and 81%,respec-tively,compared to those of the base oil.An induced uniform and continuous multi-apertured self-reconditioning layer has formed on the friction surface with a thickness about 1.52 μm due to the complex physicochemical in-teractions between the fibers and contact surface.The layer shows smooth and possesses nano-mechanical prop-erties,which was responsible for the significant decrease in friction and wear,mainly with Fe,C,O,Si and small content of Mg and Al.