Extremely thin ceramic coatings can completely change the properties of technical components. Coatings are used, for example, to increase the resistance of metals to heat or corrosion. Coating processes play a role for large turbine blades as well as for extremely stressed tools in production technology. TU Wien (Vienna) has now investigated what determines the stability of such coatings. And the results, some of which were obtained at the DESY synchrotron in Hamburg, are quite surprising: the ceramic layers break down in a completely different way than metals. Material fatigue hardly plays a role; the decisive factor is the intensity of extreme load peaks (so called stress intensity factor). This finding will change the method used to measure and further improve the resistance of thin films in the future.
In recent years, the widespread adoption of fiber-reinforced plastic (FRP) parts across industries has heightened the demand for eco-friendly and high-quality coatings. Ultra-fine powder coatings have emerged as a promising solution, offering a cost-effective and environmentally friendly alternative to traditional solvent paints. However, challenges such as low powder flowability and high curing temperatures hinder their […]
In a hydrothermal synthesis process, a non-crystalline aluminum silicate similar to the clay mineral allophane was created. This synthetic mineral was subsequently incorporated as a nanofiller into both clear and multicolored aqueous emulsion paints. Analysis through X-ray diffraction confirmed the nanofiller’s amorphous structure, displaying a narrow particle size distribution with an average diameter of 1.2 […]
Plasma Electrolytic Oxide (PEO) Coatings are hard, dense, wear-resistant, and well-adhered oxide coatings for metals such as aluminum and magnesium. The process by which they are grown may also be referred to as micro-arc oxidation (MAO) or spark discharge anodizing. Essentially, it involves the modification of a conventional anodically grown oxide film by the application […]