Study of polymer/metal coating under stress using positron annihilation spectroscopy |
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| Affiliation: | 1. Interfaculty Reactor Institute, Delft University of Technology, Mekelweg 15, 2629 JB Delft, The Netherlands;2. Materials Science Center, University of Groningen, Nijenborgh 4, 9747 AG Groningen, The Netherlands;1. School of Materials Science and Engineering, South China University of Technology, Guangzhou 510640, China;2. Departamento Física de la Materia Condensada, ICMSE-CSIC, Universidad de Sevilla, P.O. Box 1065, 41080 Sevilla, Spain;1. Inner Mongolia Key Laboratory for Physics and Chemistry of Functional Materials, Inner Mongolia Normal University, Hohhot, 010022, China;2. Fundamental Aspects of Materials and Energy Group, Faculty of Applied Sciences, TU Delft, Mekelweg 15, 2629 JB, Delft, The Netherlands;3. Laboratory of Electron Microscopy and Microanalysis, Advanced Institute for Science and Technology, Hanoi University of Science and Technology, 01 Dai Co Viet Street, Hanoi, 10000, Viet Nam;4. BASF Nederland B.V., Strijkviertel 67, 3454 PK, De Meern, The Netherlands;5. Max Planck Institute for Chemical Physics of Solids, Nöthnitzer Str. 40, 01187, Dresden, Germany;6. Physics and Materials Science Research Unit, University of Luxembourg, 162a avenue de la Faïencerie, L-1511, Luxembourg |
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| Abstract: | Positron annihilation spectroscopy (PAS) has proven to be a very useful technique for, e.g., the study of defects in materials and the characterization of polymer free-volume. Positron lifetime, Doppler broadening of the annihilation radiation (characterized by the so-called S parameter) and angular correlation of annihilation radiation (ACAR) are the techniques used mostly. In the last few years these techniques have been extended to the study of physical defects at the atomic level of coating systems. These studies show that positron lifetime and the S parameter can monitor the degradation of the coating due to environmental changes (water or UV exposure). The present work is focused on the behavior of coatings under external stresses as studied by PAS. Results of positron annihilation measurements (before and after stretching) on interstitial free (IF) steel coated with epoxy using the Delft variable energy positron (VEP) beam facility are discussed. |
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