本文選題：PTFE基復(fù)合材料 + 摩擦起電電壓��； 參考：《合肥工業(yè)大學(xué)》2017年碩士論文

【摘要】：本文研究三種PTFE基復(fù)合材料(Cu/PTFE、CuO/PTFE、Gr/PTFE)與45鋼摩擦磨損過程中產(chǎn)生的摩擦起電現(xiàn)象,分析了影響摩擦起電電壓的影響因素;探討了影響Cu/PTFE復(fù)合材料摩擦磨損性能的因素;研究了Cu/PTFE復(fù)合材料與45鋼摩擦磨損過程中摩擦起電電壓與其摩擦學(xué)特性的關(guān)聯(lián)性;分析Cu/PTFE復(fù)合材料摩擦起電電壓對摩擦磨損機理的影響。采用3D激光掃描顯微鏡分析不同摩擦起電電壓下45鋼表面轉(zhuǎn)移膜厚度,利用掃描電子顯微鏡和能譜分析儀分析轉(zhuǎn)移膜微觀形貌和元素組成。通過對PTFE基復(fù)合材料與45鋼的摩擦起電性能與摩擦學(xué)特性的研究,以期獲得調(diào)控復(fù)合材料摩擦磨損性能的新手段。通過分析與研究,得出如下結(jié)論:⒈各因素對PTFE基復(fù)合材料摩擦起電性能的影響PTFE基復(fù)合材料的摩擦起電電壓隨載荷的增加而增大;隨著速度的增大,復(fù)合材料摩擦起電電壓逐漸增大;填料含量一定時,PTFE基復(fù)合材料摩擦起電電壓隨填料粒徑的增加而增大;導(dǎo)電性能較好的填料(例如Cu或Gr),其復(fù)合材料摩擦起電電壓隨填料含量的增加呈先增加后減小的趨勢;而對于非導(dǎo)電的填料CuO,其復(fù)合材料摩擦起電電壓隨填料含量的增加而逐漸增大;PTFE基復(fù)合材料摩擦起電電壓隨復(fù)合材料介電常數(shù)的增加而逐漸減小。⒉Cu/PTFE復(fù)合材料摩擦學(xué)特性的影響因素Cu/PTFE復(fù)合材料摩擦系數(shù)隨載荷的增大而逐漸減小,磨損量隨載荷的增加而逐漸增大;隨試驗速度的增大,PTFE基復(fù)合材料摩擦系數(shù)逐漸減小,磨損量則隨速度的增大而增加;隨著填料粒徑的增大,Cu/PTFE復(fù)合材料摩擦系數(shù)逐漸增大,磨損量隨填料粒徑的增大而逐漸增大;Cu/PTFE復(fù)合材料摩擦系數(shù)隨填料含量的增大而增加,復(fù)合材料磨損量隨填料含量的增加呈先減小后略有增加的趨勢,且填料含量為10wt%時,復(fù)合材料磨損量達到最小值。⒊Cu/PTFE復(fù)合材料摩擦學(xué)特性與摩擦起電性能的關(guān)聯(lián)性Cu/PTFE復(fù)合材料的摩擦系數(shù)隨摩擦起電電壓的增加而逐漸減小,磨損量隨摩擦起電電壓的增大而增加。⒋Cu/PTFE復(fù)合材料摩擦起電性能對其磨損機理的影響Cu/PTFE復(fù)合材料與45鋼摩擦過程中產(chǎn)生的摩擦起電現(xiàn)象,摩擦起電電壓一方面促使填料顆粒富集在45鋼表面并促進轉(zhuǎn)移膜的形成,從而優(yōu)化復(fù)合材料的摩擦學(xué)特性;另一方面,摩擦起電電壓促使復(fù)合材料內(nèi)填料顆粒逐漸向摩擦表面富集,進一步提高復(fù)合材料的摩擦磨損性能。
[Abstract]:In this paper, the tribological generation of three kinds of PTFE matrix composites, CuO / PTFEFE-Gr-PTFEE) and 45 steel, is studied, the factors affecting the friction voltage are analyzed, and the factors affecting the friction and wear properties of Cu/PTFE composites are discussed.The relationship between the friction starting voltage and the tribological properties of Cu/PTFE composites and 45 steel during friction and wear was studied, and the effect of the friction starting voltage on the friction and wear mechanism of Cu/PTFE composite was analyzed.The thickness of transfer film on 45 steel surface was analyzed by 3D laser scanning microscope and the microstructure and element composition of the transfer film were analyzed by scanning electron microscope and energy spectrum analyzer.The electrical and tribological properties of PTFE matrix composites and 45 steel were studied in order to obtain a new method to control the friction and wear properties of composites.Through analysis and research, the following conclusions are drawn: the effect of different factors on the friction initiation properties of PTFE matrix composites; the friction initial voltage of PTFE matrix composites increases with the increase of load, and increases with the increase of velocity.The friction starting voltage of PTFE matrix composites increases with the increase of the particle size of filler, and the friction starting voltage of PTFE matrix composites increases with the increase of filler size.The friction starting voltage of the composites with better conductive properties (such as Cu or Gr-O) increased first and then decreased with the increase of filler content.For non-conductive filler CuO, the friction initial voltage of PTFE matrix composites increases with the increase of filler content, and decreases with the increase of dielectric constant of PTFE composites.The friction coefficient of Cu/PTFE composites decreases with the increase of load.The friction coefficient of PTFE matrix composites decreases with the increase of test speed, and the wear rate increases with the increase of velocity, and the friction coefficient of Cu / PTFE composites increases with the increase of filler particle size.The friction coefficient of Cu- / PTFE composites increases with the increase of filler particle size. The wear rate of composites decreases first and then increases slightly with the increase of filler content, and when the filler content is 10 wt%, the wear rate of the composites increases with the increase of filler content, and the friction coefficient of Cu- / PTFE composites increases with the increase of filler content.The relationship between tribological Properties and tribological Properties of Cu/PTFE Composites with minimum Wear capacity of 路3Cu / PTFE the friction coefficient of Cu/PTFE composites decreases with the increase of the starting voltage of friction.Effect of friction Electrical Properties on Wear Mechanism of 4Cu / PTFE Composites with the increase of starting Voltage of friction the friction initiation phenomenon of Cu/PTFE composite and 45 steel is observed.On the one hand, tribological characteristics of the composite are optimized by the friction starting voltage, on the one hand, the filler particles are enriched on the surface of 45 steel and the transfer film is formed, on the other hand,The tribological voltage induces the accumulation of filler particles to the friction surface and further improves the friction and wear properties of the composites.
【學(xué)位授予單位】：合肥工業(yè)大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TB333

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