The composition,microstructure,mechanical and frictional properties of PTFE and its fillers were represented and analyzed by XRD,SEM,DSC,XPS and large-scale polarizing microscope.The results show that PTFE has a flocculent structure with high melt temperature and decomposition temperature,big contact angle and crystallinity,and low surface hardness,compression strength,friction coefficient,wearing capacity and surface energy.Cooling rate influenced the friction coefficient and wear resistance.Graphite and molybdenum disulfide have a flake structure,and molybdenum disulfide has a big contact angle and low surface energy.Copper powder has a globular structure and its chief component is Cu-Pb alloy,and there is a loose layer on the surface.Carbon fiber has a rod structure and there are C=O and C-O-C polar groups on the skeleton surface.The decreasing order of water absorption capacity is graphite,carbon fiber,molybdenum disulfide, PTFE and copper powder.
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机译:a generalized mixture rule for estimating the viscosity of solid-liquid suspensions and mechanical properties of polyphase rocks and composite materials
机译:Natural (天然) and units (高单位) nutrients (营养素) 13 one component (成分) Total (综合) Vitality (活力) Samtoh, high natural nutritious foods (食品) of the name is excellent (优秀) a domestic natural raw materials (国产自然原料) using 12 species (利用) and processing (加工处理) and a method of manufacturing (制造方法)