Abstract
AbstractThermal barrier coatings (TBCs) are widely utilized in gas turbine engines for power generation. In recent years, the application of TBCs in automotive has been introduced to improve engine efficiency. Low thermal conductivity and high durability are desired coating properties for both gas turbine engines and automotive. Also, suspension plasma spraying (SPS) permits a columnar microstructure that combines both properties. However, it can be challenging to deposit a uniform columnar microstructure on a complex geometry, such as a gas turbine component or piston head, and achieve similar coating characteristics on all surfaces. This work's objective was to investigate the influence of spray angle on the microstructure and lifetime of TBCs produced by SPS. For this purpose, SPS TBCs were deposited on specimens using different spray angles. The microstructures of the coatings were analyzed by image analysis for thickness, porosity, and column density. Thermal and optical properties were evaluated on each TBC. Lifetime tests, specifically designed for the two applications, were performed on all investigated TBCs. The lifetime results were analyzed with respect to the TBC microstructure and thermal and optical properties. This investigation showed that there is a limit to the spray angle that achieves the best compromise between TBC microstructure, thermal properties, optical properties, and lifetime.
Publisher
Springer Science and Business Media LLC
Subject
Materials Chemistry,Surfaces, Coatings and Films,Condensed Matter Physics
Reference70 articles.
1. M. Gross, A Planet with Two Billion Cars, Curr. Biol., 2016, 26(8), p R307-R310.
2. “Worldwide gas turbine report,” Turbomachinery magazine, 2020, https://www.turbomachinerymag.com/worldwide-gas-turbine-report/. Accessed 16 March 2021.
3. S. Slade and C. Palmer, Declines are apparent for the next few years, but a market recovery is in sight, n.d., p 15.
4. D.R. Tree, D.C. Oren, T.M. Yonushonis and P.D. Wiczynski, Experimental Measurements on the Effect of Insulated Pistons on Engine Performance and Heat Transfer, SAE Int., 1996, 105, p 374-385.
5. R. Kamo, N.S. Mavinahally, L. Kamo, W. Bryzik and E.E. Schwartz, Injection Characteristics That Improve Performance of Ceramic Coated Diesel Engines, SAE Int., 1999 https://doi.org/10.4271/1999-01-0972
Cited by
5 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