Guna Čivčiša

3D Surface Roughness Parameters of Nanostructured Coatings with Application in the Aerospace Industry

This paper presents a study of 3D surface texture measurements and analysis of several surface texture parameters. A stylus measuring instrument was used to measure 3D surface topographies. In experimental part of this study, two coated gas turbine blades used in aerospace industry were chosen to examine surface of the coatings in nano-scale. Surface texture parameters of Ti-Al coating and Ti-Al-N coating were measured and compared to each other. The aim of the research is to analyze the surface of these coatings in an areal (3D) manner. The results indicate slight differences between these two surface textures despite the fact that both are Titanium-based coatings, and the surface of base material for both samples was prepared in the same way before deposition. Further study with repeated measurements of surface texture for deposed coatings has to be made after erosion tests.

The measurement of surface texture for nanostructured coatings

This paper explores the relevant three-dimensional (3D) roughness parameters used to characterise surface texture of nanostructured coatings. The purpose of this work is to analyze 3D texture parameters for obtaining information of the nanoparticles coated surface properties. Several main parameters were measured and analyzed namely, height (Ssk, Sku), spatial (Str), functional (Vmc, Vvc) and feature (Sds). Two samples with different deposition technologies were chosen for this study to determine functional properties of surfaces and by comparing the measured 3D parameters to estimate which sample shows better operational characteristics.