Some Insights into the Scratch Resistance Assessment of Polycrystalline Diamond Coatings

Abstract

This study explores the scratch resistance and adhesion performance of polycrystalline diamond (PCD) coatings, crucial for their application in demanding industrial environments. Applying instrumented scratch testing, a practical, quick, cheap, and reliable test method, the adhesion strength of PCD coatings on steel substrate is assessed. Recognizing the limitations of the conventional scratch testing using a diamond stylus when applied for PCD coatings, a modification, namely the use of a stainless steel ball as a scratching tool, and its applicability for characterizing the scratch behavior of PCDs are discussed to offer a simpler and more economical way for tr