Abstract 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.

中文翻译：

---

基于非牛顿流体的非接触式亚孔径抛光

摘要 顺从抛光（例如阀盖抛光）广泛用于精加工自由曲面。然而，直接垫/表面接触通常会导致划痕或嵌入磨料，尤其是在金属模具上。在这里，报道了使用非牛顿流体（聚合物和淀粉）来实现非接触式抛光而无需抛光垫。进行建模和分析以揭示流体流变学对材料去除机制的影响。使用#6000 粒度氧化铝，可以获得高斯形状的去除足迹，在镍上完全无划痕的粗糙度为 3.9 nm Ra，而通过一般的水基阀盖抛光获得的粗糙度为 70.3 nm。