Non-Newtonian fluid based contactless sub-aperture polishing

Wu Le Zhu, Anthony Beaucamp

Research output: Contribution to journalArticlepeer-review

31 Citations (Scopus)


Compliant polishing (e.g. bonnet polishing) is widely used to finish freeform surfaces. However, direct pad/surface contact often causes scratches or embedding of abrasives, especially on metal moulds. Here, the use of non-Newtonian fluid (polymer and starch) to enable contactless polishing without need for a polishing pad is reported. Modelling and analysis are conducted to reveal the influence of fluid rheology on the material removal mechanism. Using #6000 grit alumina, Gaussian shaped removal footprints can be obtained, with a completely scratch-free roughness of 3.9 nm Ra on Nickel, in contrast with 70.3 nm Ra obtained by general water based bonnet polishing.

Original languageEnglish
Pages (from-to)293-296
Number of pages4
JournalCIRP Annals
Issue number1
Publication statusPublished - 2020
Externally publishedYes


  • Non-Newtonian fluid
  • Polishing
  • Ultra precision

ASJC Scopus subject areas

  • Mechanical Engineering
  • Industrial and Manufacturing Engineering


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