Papers by Author: Y. Chen

Abstract: This article reviews the state-of-the-art techniques for polishing diamond and polycrystalline diamond composites. A focus is on their material removal mechanisms and features. It concludes that while each of them has its advantages and drawbacks, the technique by dynamic friction has a promising potential for polishing production.

Abstract: This paper discusses the temperature characterization for nano-polishing of polycrystalline diamond composites (PCDCs) by combined experimental and theoretical modelling. It was found that a higher polishing pressure-speed combination results in a higher temperature rise and material removal rate. To optimize the nano-polishing of PCDCs and achieve a surface roughness of Ra = 50 nm, the interface temperature at polishing needs to be maintained at an appropriate level.

Abstract: This paper presents a cost-effective technique for achieving optical surface finish of thermally stable polycrystalline diamond (PCD) composites using dynamic friction polishing (DFP). The effect of polishing parameters on the material removal rate and surface characteristics of polished specimens were studied. The surface characterisation was carried out by optical microscopy, atomic force microscopy (AFM), scanning electron microscope (SEM) and its attached energy dispersive X-ray (EDX) analysis. It was found that optical surface finish of PCD with roughness Ra = 50 nm could be obtained efficiently with nearly a ten fold reduction in polishing time compared to the currently used method in industry.