Mode transition from adsorption removal to bombardment removal induced by nanoparticle-surface collisions in fluid jet polishing  

作　　者：Xuechu ZHAO Liran MA Xuefeng XU 

机构地区：[1]School of Technology,Beijing Forestry University,Beijing 100083,China [2]State Key Laboratory of Tribology,Tsinghua University,Beijing 100084,China

出　　处：《Friction》2021年第5期1127-1137,共11页摩擦（英文版）

基　　金：The work is financially supported by the National Natural Science Foundation of China(Nos.51575054 and 51527901);the Fundamental Research Funds for the Central Universities(No.YX2013‐02).

摘　　要：The effects of impacting particles from a jet of liquid on the removal of a surface material(on the impacted workpiece)were investigated.Experimental observations show that the cross section of the material removed changed fromʹWʹ‐shaped toʹUʹ‐shaped as the size of abrasive particles was increased.Comparisons between removed material profiles and particle collision distributions indicate that the particle-surface collisions are the main reason for the material removal.The deduced number of atoms removed by a single collision implies that a transition occurs in the removal mode.For nanoscale particles,the polished surface is likely to be removed in an atom‐by‐atom manner,possibly due to the chemisorption of the impacting particles on the impacted surface.Contrarily,for the case of microscale particles,bulk material removal produced by particle bombardment is more likely to occur.The present mechanism of material removal for particle-surface collisions is further corroborated experimentally.

关 键 词：ultra‐smooth surface fluid jet polishing nanoparticle-surface collision material removal 

分 类 号：TB306[一般工业技术—材料科学与工程]