Measurement of Young’s Modulus of Thermal Barrier Coatings by Suspended Coupled Flexural Resonance Method

Abstract:

Thermal barrier coatings(TBCs) has been extensively used on hot section components of gas turbine engine, especially turbine blades. Young’s modulus of TBCs is a significant mechanical parameter in life prediction research of turbine blades, but it is hard to measure the EB-PVD thermal barrier coatings by conventional tensile/compression method for its brittleness and porous microstructure. Therefore, Young’s modulus mathematical model of double-layer beam structure specimen was deduced on the basis of the first-order beam bending vibration equation and composite beam bending equation. An experimental platform with dynamic signal acquisition system was set up for measuring Young's modulus of thermal barrier coatings under high temperature. Young's modulus of ceramic coat was measured from ambient temperature to 1100°C to provide material data for subsequent research on life prediction of turbine blades with thermal barrier coatings.

• Periodical: Applied Mechanics and Materials (Volume 853)
• Pages: 436-440
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.853.436
• Online since: September 2016
• Authors: Shen Zhi Zhang, Hong Yu Qi*, Hong Wei Yang, Cheng Cheng Zhang, Jing Yun Gao
• Keywords: Electron-Beam Physical Vapor Deposition, Suspended Coupled Flexural Resonance, Thermal Barrier Coatings, Young's Modulus

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