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January 8th, 2011

New ceramic coatings to improve durability of turbine engines

Published on January 8th, 2011 | By: pwray@ceramics.org

In the recent print edition of Watts News, Ohio State University’s Department of Materials Science and Engineering newsletter, an article describes new developments that may extend the life of gas turbine engines.

ACerS student member and MSE doctoral candidate Andy Gledhill, under the leadership of Nitin Padture, has developed a computer-controlled “blowtorch” that is constructed to simulate the thermal environment in gas turbine engines. With this equipment, rapid thermal cycling of ceramic coatings used in turbines can be tested to predict lifetimes as well as understand the effects of impurities ingested in the engines, such as sand, coal and ash/dust.

“I’m trying to simulate the environment in which turbine engines operate – where temperatures can operate between 25 and 1,200° C. It can be tricky to replicate that environment,” says Gledhill.

Gledhill has been working on the project for two years, and says the goal of his research is to provide a comprehensive understanding of the degradation of thermal barrier coatings due to ash deposits, and to find a way to mitigate the impact of those deposits.

Gledhill believes his research will open more possibilities for electricity-producing turbine manufacturers to switch from natural gas as their fuel source to syngas which is much more affordable. The obstacle with syngas is that it contains impurities that generate deposits which degrade the zirconia thermal barrier coating.

“There is growing evidence that the use of syngas in turbine engines results in different types of degradation to thermal barrier coatings compared to using conventional fuels,” says Gledhill.

 


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3 Responses to New ceramic coatings to improve durability of turbine engines

  1. philippe bringier says:

    hi Peter

    we started a new company in spain skapa polyteck and a sister one in germany skapa pm covers
    we are producing rolls covers for the paper industry for winders and dryers ,I am looking for improving our coatings ( tunsgten carbide teflon or silicon) for some special applications

    I am interrested about the BAM ,price ,quantity available

    we can make covers on pieces of 1,8 meter diameter with 10 meters lenght

    started to make the first covers for paper industry with Tungsten cabide in early 90 using the the technology of the blade industry

    wait for your answer

    best regards
    philippe

  2. Peter Wray says:

    We’ve previously written about BAM here and here.

  3. Peter Hong says:

    I am the COO of New Tech Ceramics, Inc. and we have a boron based ceramic material, AlMgB14, also known as, BAM, that has significant properties of hardness and lubricity that can operate in this temperature realm depending on the coefficient of thermal expansion of the substrate. BAM is approximately 60% the hardness of industrial diamond and approaching the lubricity of Teflon. We have successfully tested on aluminum by building a multi-layer thin film coating to absorb the expansion and prevent the micro cracking. What size of sample and base substrate do you use? Are you interested in trying our material?

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