Volume 4, Issue 1, June 2018, Page: 16-22
Oxidation Behavior of YAG-Al2O3 Coatings Toughened by Pt Nano-Particles
Peng Wang, Research Institute of Aerospace Special Materials and Processing Technology, Beijing, China
Yu Xinmin, Research Institute of Aerospace Special Materials and Processing Technology, Beijing, China
Liu Junpeng, Research Institute of Aerospace Special Materials and Processing Technology, Beijing, China
Zuo Hongjun, Research Institute of Aerospace Special Materials and Processing Technology, Beijing, China
Huo Pengfei, Research Institute of Aerospace Special Materials and Processing Technology, Beijing, China
Received: Jul. 20, 2018;       Accepted: Aug. 3, 2018;       Published: Sep. 1, 2018
DOI: 10.11648/j.nsnm.20180401.13      View  224      Downloads  17
Abstract
YAG (Y3Al5O12)-Al2O3-Pt composite TBCs have been prepared on Ni-based superalloy (0.1% C, 12% Co, 6.5% Cr, 6.2% Al, 5% W, 1% Mo, 1.5% Hf, 6.5% Ta, 0.01% B, balance Ni, wt.%) by cathode plasma electrolytic deposition (CPED). As polyethylene glycol (PEG) is added in solution, the spark ignition current density is reduced significantly, and CPED would be a promising technique to deposit the uniform coatings on large-sized cathode. The cyclic oxidation tests at 1100°C reveal that the high temperature oxidation resistance of such TBCs are significantly improved by dispersing Pt particles. These excellent performances can be attributed to the effects: the low porosity of coating can inhibit further oxidation of alloy substrate, the toughening role of Pt particles and the stress relaxation caused by the deformation in the porous structure can improve the mechanical properties remarkably. The spallation resistance of YAG-Al2O3-Pt composite coating can be significant improved by using the following two method: one is adding PEG 20000 to the solution during the CPED process; the other is using Pt particle to toughness the coating. In addition, such YAG-Al2O3-Pt composite coatings possess quite well thermal insulation owing to the thermal insulation capability of YAG and the structure of vertical block micropores.
Keywords
Cathode Plasma Electrolytic Deposition, YAG-Al2O3-Pt Composite Coatings, Thermal Barrier Coatings
To cite this article
Peng Wang, Yu Xinmin, Liu Junpeng, Zuo Hongjun, Huo Pengfei, Oxidation Behavior of YAG-Al2O3 Coatings Toughened by Pt Nano-Particles, Nanoscience and Nanometrology. Vol. 4, No. 1, 2018, pp. 16-22. doi: 10.11648/j.nsnm.20180401.13
Copyright
Copyright © 2018 Authors retain the copyright of this article.
This article is an open access article distributed under the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/) which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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