Gas Turbine Coatings

SST’s gas turbine coatings are produced in small batch coating including bond coats from commercially available powders by HVOF or Plasma Spray:

• Metco Diamalloy 4700
• Praxair NI130
• Metco Amdry 365-1 or 365-2

Thermal Barrier Coatings (TBCs) commercial below, and custom

• Yttria stabilized zirconia (YSZ)
• Gadolinium zirconate (GZO)
• Yttrium aluminum garnet (YAG)
• Ytterbium silicate environmental barrier coatings (EBCs)

Custom compositions of TBCs Yttrium aluminum garnet (YAG), including a burner liner, fuel injector, and outer air seals are shown below.

Relevant Publications

– Jordan, E. H., Gell, M., Kumar, R., & Jiang, C. (2019). U.S. Patent No. 10,472,286. Washington, DC: U.S. Patent and Trademark Office.

– Jordan, E. H., Jiang, C., & Gell, M. (2015). The solution precursor plasma spray (SPPS) process: a review with energy considerations. Journal of Thermal Spray Technology, 24, 1153-1165.

– Gell, M., Wang, J., Kumar, R., Roth, J., Jiang, C., & Jordan, E. H. (2018). Higher temperature thermal barrier coatings with the combined use of yttrium aluminum garnet and the solution precursor plasma spray process. Journal of Thermal Spray Technology, 27, 543-555.

– Kumar, R., Jordan, E., Gell, M., Roth, J., Jiang, C., Wang, J., & Rommel, S. (2017). CMAS behavior of yttrium aluminum garnet (YAG) and yttria-stabilized zirconia (YSZ) thermal barrier coatings. Surface and Coatings Technology, 327, 126-138.

– Jordan, E. H., Jiang, C., Roth, J., & Gell, M. (2014). Low thermal conductivity yttria-stabilized zirconia thermal barrier coatings using the solution precursor plasma spray process. Journal of thermal spray technology, 23, 849-859.

– Jiang, C., Jordan, E. H., Harris, A. B., Gell, M., & Roth, J. (2015). Double-layer gadolinium zirconate/yttria-stabilized zirconia thermal barrier coatings deposited by the solution precursor plasma spray process. Journal of Thermal Spray Technology, 24, 895-906.

– Kumar, R., Cietek, D., Jiang, C., Roth, J., Gell, M., & Jordan, E. H. (2018). Influence of microstructure on the durability of gadolinium zirconate thermal barrier coatings using APS & SPPS processes. Surface and Coatings Technology, 337, 117-125.

– Kumar, R., Wang, J., Jiang, C., Cietek, D., Favata, J., Shahbazmohamadi, S., … & Jordan, E. H. (2018). Low thermal conductivity yttrium aluminum garnet thermal barrier coatings made by the solution precursor plasma spray: part I—processing and properties. Journal of Thermal Spray Technology, 27, 781-793.

– Kumar, R., Jiang, C., Wang, J., Cietek, D., Roth, J., Gell, M., & Jordan, E. H. (2018). Low thermal conductivity yttrium aluminum garnet thermal barrier coatings made by the solution precursor plasma spray: part II—planar pore formation and CMAS resistance. Journal of Thermal Spray Technology, 27, 794-808.

– Jiang, C., Cietek, D., Kumar, R., & Jordan, E. H. (2020). Ytterbium silicate environmental barrier coatings deposited using the solution-based precursor plasma spray. Journal of Thermal Spray Technology, 29(5), 979-994.