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Enhanced High-Temperature YSZ-polyester Abradable Honeycomb Seal Structures.

P Pathak1, D Dzhurinskiy1, A Elkin1

  • 1Center for Design, Manufacturing, and Materials, Skolkovo Institute of Science and Technology, Moscow, Russian Federation 143025.

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|July 31, 2023
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Summary
This summary is machine-generated.

This study introduces a new thermal shock resistant honeycomb seal for gas turbines. The advanced coating improves high-temperature performance and reliability in hot gas paths.

Keywords:
APSYSZabradable coatingfinite element analysisgas Turbineshoneycomb Seal

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Area of Science:

  • Materials Science
  • Mechanical Engineering
  • Aerospace Engineering

Background:

  • Abradable coatings enhance turbomachinery performance by sealing rotating blades and stationary casings.
  • Improving seal design for higher energy demand and extended service life is crucial for gas turbines.
  • Honeycomb seals are the industry standard for clearance seals due to their design, strength, and low weight.

Purpose of the Study:

  • To propose a concept for a thermal shock resistant structure for high-temperature abradable seal applications in gas turbine hot gas paths.
  • To enhance temperature capability and reliability of advanced gas turbine seal structures.
  • To develop innovative technology for next-generation gas turbine seals.

Main Methods:

  • Coating a SS 321 alloy honeycomb seal structure with ZrO2 + 7.5%Y2O3 + 4% polyester using a TriplexPro-210 plasma spray system.
  • Assessing seal integrity via cross-sectional analysis and coating microstructure evaluation.
  • Conducting micro-hardness tests for coating fracture toughness and finite element analysis for thermo-mechanical performance.

Main Results:

  • The study successfully applied an advanced high-temperature coating to a honeycomb seal structure.
  • Coating integrity and microstructure were evaluated, providing insights into material behavior.
  • Thermo-mechanical performance was assessed through micro-hardness and finite element analysis.

Conclusions:

  • The proposed concept demonstrates potential for improving high-temperature abradable seal structures.
  • Further validation is required to develop this innovative technology for advanced gas turbine applications.
  • The study contributes to enhancing the reliability and performance of gas turbine components.