My peer reviewed article this week is about "Perspectives on Environmental Barrier Coatings (EBCs) Manufactured via Air Plasma Spray (APS) on Ceramic Matrix Composites (CMCs):  A Tutorial Paper" published in Springer Nature's Journal of Thermal Spray Technology on February 9, 2021.  It was written by Kang N. Lee and Dongming Zho of NASA, and Rogerio S. Lima of the National Research Council of Canada (NRC).  It begins by explaining the objective of this paper is to present the reader of how and why these new coatings are being used in jet engines.  It explains the non-stop driving force behind increasing combustion temperatures of jet engines, showing the basic concepts of CMCs and the need of identifying the complexity of creating EBC architecture.  Finally, they showed how Environmental Barrier Coatings (EBCs) and Ceramic Matrix Composites (CMCs) are tested at high temperatures (ASM International, 2021).

    The driving force behind this new technology is the non-stop demand for more efficient and environmentally friendly propulsion and energy generating systems in jet engines.  They describe how EBCs, and CMCs are now slowly being introduced as parts of the components located in the hot zones, or sections of aerospace gas turbines (ASM International, 2021).  Currently these components are included in the combustion chamber and the shrouds of jet engines.  In the future, it is expected that nozzles, blades, and afterburners will be manufactured by Ceramic Matrix Composites as well.

     These new Ceramic Components and Environmental Barrier Coatings (EBCs) will better protect jet engines against high temperature and environment than the current super-alloy components that are being used today.  These new ceramic-based gas turbines will emit fewer pollutants than current engines.  Also, since these new materials are 1/3 the density of the super-alloys, they will have the combination of higher power levels and a lower total mass.  This will result in new gas turbine engines that exhibit superior thrust-to-weight ratios that are totally unmatched by current technologies.  This will be paramount to aerospace applications in the future.

 

 

Works Cited

ASM International. (2021, February 9). Perspectives on Environmental Barrier Coatings (EBCs) Manufactured via Air Plasma Spray (APS) on Ceramic Matrix Composites (CMC's): A Tutorial Paper.

 

 

     

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