Affiliation:
1. BAIMTEC Material Co., Ltd., Beijing 100094, China
2. Department of Mechanics, Tianjin University, Tianjin 300350, China
Abstract
Electron beam physical vapour deposition (EB-PVD) technology is a standard industrial method for the preparation of a thermal barrier coating (TBC) deposition on aeroengines. The internal stress of EB-PVD TBCs, including stress inside the top coating (TC) and thermal oxidation stress during long-term service is one of the key reasons for thermal barrier failures. However, research on the synergistic characterization of the internal stress of EB-PVD TBCs is still lacking. In this work, the stress inside the TC layer and the thermal oxidation stress of EB-PVD TBC during long-term thermal cycles were synergistically detected, combining Cr3+-PLPS and THz-TDS technologies. Based on a self-built THz-TDS system, stress-THz coefficients c1 and c2 of the EB-PVD TBC, which are the core parameters for stress characterization, were calibrated for the first time. According to experimental results, the evolution law of the internal stress of the TC layer was similar to that of the TGO stress, which were interrelated and influenced by each other. In addition, the internal stress of the TC layer was less than that of the TGO stress due to the columnar crystal microstructure of EB-PVD TBCs.
Funder
National Natural Science Foundation of China
Subject
General Materials Science
Reference70 articles.
1. Hu, C. (2009). Special Functional Coatings, Beijing, Beijing University of Technology Press.
2. Effects of glycine on mechanical properties and microstructure of diamond-reinforced Ni nanocomposite coatings;Zhang;J. Mater. Sci.,2019
3. Enhancement of the wear resistance of Ni-diamond composite coatings via glycine modification;Zhang;Diam. Relat. Mater.,2020
4. Some recent trends in research and technology of advanced thermal barrier coatings;Schulz;Aerosp. Sci. Technol.,2003
5. Insight into the corrosion inhibition of novel macromolecular epoxy resin as highly efficient inhibitor for carbon steel in acidic mediums: Synthesis, characterization, electrochemical techniques, AFM/UV-Visible and computational investigations;Hsissou;J. Mol. Liq.,2021
Cited by
1 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献