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The Wonderful World of Zirconia: Engineering Thermal Barrier Materials

In this talk we will discuss the history of thermal barrier coating (TBC) chemistries, where different chemistries excel, and how doping has been used to design phase stable, low conductivity, strain compliant, and erosion resistant materials. This background will provide the basis for a discussion on the development of Linde’s new low k, high toughness TBC chemistry that hopes to replace 7YSZ and gadolinium zirconate in some of the harshest operating turbines.




Originally presented: April 18, 2024
Duration: 1 hour
Presented by:

Overview

Thermal barrier coatings (TBCs) are ubiquitous in modern turbine technologies and are largely based on rare earth stabilized zirconia in many forms: 7YSZ, GZO, Y4Zr3O12, cluster compounds etc.

In this talk we will discuss the history of TBC chemistries, where different chemistries excel, and how doping has been used to design phase stable, low conductivity, strain compliant, and erosion resistant materials. This background will provide the basis for a discussion on the development of Linde’s new low k, high toughness TBC chemistry that hopes to replace 7YSZ and gadolinium zirconate in some of the harshest operating turbines.

Key Takeaways

  • Learn about Linde AMT's new low k, high toughness TBC chemistry
  • Understand why 7YSZ is the industry standard for thermal barrier materials
  • Evaluate the effect of different doping regimes for thermal barrier materials and their impact on materials properties

Speaker

Dr. Molly O'Connor, Expert Scientist, Advanced Materials Research and Development Group, Linde Advanced Material Technologies

O’Connor is an expert scientist in the Advanced Materials Research and Development group at Linde Advanced Material Technologies with a focus on the development of new materials chemistries and coatings for use in hot and harsh environments. She received her BS in metallurgical and materials engineering from Illinois Institute of Technology and a PhD in Materials from University of California, Santa Barbara. In addition to her work at Linde AMT, she also worked as a materials scientist at GE Research and as a faculty member at both Texas A&M University and Stony Brook University. She has over 20 publications in peer reviewed journals and has been awarded 16 patents in the area of coatings for turbine engines. O’Connor currently sits on the executive board of the ASM International, Thermal Spray Society Board of Directors.