Inorganic Coatings – Metallic and Other Inorganic Coatings – Vickers and Knoop Microhardness Testing. ISO 4516:2002 outlines the Vickers and Knoop methods for microhardness testing of metallic and other inorganic coatings. These techniques evaluate the hardness of coatings by pressing a small indenter onto the surface and measuring the size of the indentation. The Vickers method uses a four-sided pyramidal indenter, while the Knoop method employs an asymmetric diamond-shaped indenter, better suited for thin coatings. The standard provides detailed guidelines for sample preparation, instrument calibration, and result interpretation. Microhardness testing is crucial for assessing the coating’s resistance to mechanical impact, which is vital for the durability of coated components.
Associated processes
Hardness testing