Coating defect evaluation based on stimulated thermography
| Autor: | Rosanna Tamborrino, Davide Palumbo, Umberto Galietti |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: |
Adhesion defects
Cooling Analysis Pulsed and stepped thermography Thermal Barrier Coatings Thicknesses Electronic Optical and Magnetic Materials Condensed Matter Physics Computer Science Applications1707 Computer Vision and Pattern Recognition Applied Mathematics Electrical and Electronic Engineering Materials science 020209 energy 02 engineering and technology Substrate (printing) engineering.material Thermal barrier coating 0203 mechanical engineering Coating 0202 electrical engineering electronic engineering information engineering Forensic engineering Electronic Optical and Magnetic Materials Composite material Adhesion 020303 mechanical engineering & transports Optical coating Thermography engineering |
| Popis: | Thermal Barrier Coatings are used to protect the materials from severe temperature and chemical environments. In particular, these materials are used in the engineering fields where high temperatures, corrosive environments and high mechanical stress are required. Defects present between substrate material and coating, as detachments may cause the break of coating and the consequent possibility to exposure the substrate material to the environment conditions. The capability to detect the defect zones with non-destructive techniques could allow the maintenance of coated components with great advantages in terms of costs and prediction of fatigue life. In this work, two different heat sources and two different thermographic techniques have been used to detect the adhesion defects among the base material and the coating. Moreover, an empirical thermographic method has been developed to evaluate the thickness of the thermal coating and to discriminate between an unevenness of the thickness and a defect zone. The study has been conducted on circular steel specimens with simulated adhesion defect and on specimens prepared with different thicknesses of thermal barrier coating. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|