Gas Turbines Set to Become More Durable and Lasting Due to Use of Self-Repairing Ceramic Coatings Under Extreme Heat

      Gas turbines operate continuously at high temperatures of well over 800°C (1,470°F). This makes them vulnerable to degradation through wear and friction, sometimes creating cracks in the metal. Researchers from Concordia University in Montreal recently published results of an exploration of a new type of coating that helps turbines perform better under intense heat. The research was published in the journal Communications Materials.

     Author and Ph. D. candidate Andre Mayer began by studying how oxides like rust form on engine parts.

"These oxides actually play an important role when components operate under extreme conditions, like high temperatures," he says. "They create a protective layer that prevents metal surfaces from sticking to one another during operation."

     The research team then figured out how to control the formation of preferred beneficial oxides to enhance the formation of a protective layer.

"We developed coatings made from cobalt and chromium oxides that mimic the chemistry of naturally occurring oxide layers known as glaze layers. These protective layers normally form only under very specific operating conditions and on certain engine components.

"By applying a coating with similar chemistry from the start, we can provide similar protection even where those conditions are never met," Mayer explains. "Although our new coatings are about as thick as a human hair, they can completely change the surface performance."

     The new coatings are also able to heal cracks in the metal, essentially self-repairing them. The ceramic cobalt-chromium coatings are expected to extend the lifespan of gas turbine engines and reduce maintenance requirements. 

     The materials that make up the coating also appear to be widely available and inexpensive. The technology, which is still under patent, was developed for the aerospace industry, but is also applicable to the gas turbine power industry.

"We're excited about the broader potential of this work," Stoyanov says. "While it was inspired by challenges in aerospace engines, the same concept could be applied across many engineering fields where components operate under extreme conditions."

 

 

References:

 

Self-repairing coating promises to make gas turbines more reliable and longer lasting. Chris Maskell. Tech Xplore. August 12, 2026. Self-repairing coating promises to make gas turbines more reliable and longer lasting

Glaze-enabled self-healing ceramic coatings for extreme environments. Andre R. Mayer, Omar Zouina, Michael Chandross, Martin Dienwiebel, Christian Moreau & Pantcho P. Stoyanov. Communications Materials. June 15, 2026. Glaze-enabled self-healing ceramic coatings for extreme environments | Communications Materials