金属磨损自修复技术的研究

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1、西南交通大学硕士学位论文金属磨损自修复技术的研究姓名：卓洪申请学位级别：硕士专业：机械设计及理论指导教师：刘启跃20070101西南交通大学硕士研究生学位论文第fI页很高的承载和抗磨能力，使得由剪切应力引起的弹性变形和塑性变形局限于润滑薄膜区域，因而有效地抑制了摩擦表面微凸体的粘着磨损和疲劳磨损。5．通过扫描电子显微镜(SEM)对纳米羟基磷酸钙、纳米TiO．和纳米nⅣ在磨斑处对磨损的修复机理、修复后的形态做了观察与分析。关于自修复效果，得出下列结论：TiN>HA)．TiO，；即自修复效果最好的为氮化钛，其次羟基磷酸钙，最后为二氧化钛。关键词：自修复；纳米颗粒；添加剂；摩擦磨损；润滑西南交

2、通大学硕士研究生学位论文第lJI页AbstractAllmachinerymotionsrelyOnrelativemovementofcontactpairs．Therelativemovementwouldresultintheappearanceofwear．Furthermore，wearwouldresultinsurfacedamage,failureandthelossofmaterial．Ontheotherhand，theprocessesofwearbringonthelossofpowerandthewasteofenergy．Animportantmeasureo

3、freducingwearislubrication．Ingeneral，theoldlubricationoilsonlyreducetheweal"oftherelativemovementsurfacesandprolongtheirlife．However,thelubricationoilcouldnotproduceself-repairingfilmOnthefrictionsurface．So，therearenotzelDwearandself-repairingeffectsundertraditionallubricationconditions．Withthede

4、velopmentofscienceandtechnology,therequirementstolubricatingoilanditsadditivesareincreasingyearbyye缸andtheperformanceoftheoilsarebeenimprovinggraduallynetraditionaloil-solubleanti-wearandlkiction-reducingadditivescouldincreaseload—carryingabilitiesandextreme-pressureproperties，buttheywouldproduce

5、theenvironmentalpollution．neapplicationsofordinaryinorganicparticlesaterestrictedduetothepoordispersingability．Nowadays，theapplicationofnano-materialsprovidesanewapproachforthelubricatingadditives．Theweartestsofdifferentnormalload．矗equencyandthecontentoftheadditiveshavebeenperformedunderball·-On·

6、·fiatcontactusingareciprocatingapparatusundertheHallO—particleadditivelubricationconditions．Thetribologicalcharacteristicandself-repairingmechanismofthenano-particleadditivelubricatingoilhavebeeninvestigatedindetailinthispapenMainconclusionsaredrawnasfollows：1．Undernon·repairingadditivecondition，

7、thefrictioncoefficientandthewearvolumearebigger．So，theself-repairingadditiveshavepositivesignificancetoreducethefrictiOilcoefficientandthewearofmaterial．2．”Tinypolishing’’：Firstly,thenano—particlesadditivesweredisperse