Ultrasound Measurement of All Directional Elastic Moduli on Thermal Barrier Coatings at High Temperature for Designing the Coatings

为了明确各向异性弹性模量，将针式换能器三脚架共振超声光谱技术应用于高温测量，最高温度可达1073K。该技术已应用于耐热涂层CoNiCrAlY和热障涂层氧化锆。测定了涂层在面外和面内方向上的弹性模量。结果表明，通过喷涂粉末粒度和热处理工艺可以控制材料的弹性各向异性。

Resonance ultrasound spectroscopy by needle-transducer tripod was developed into high temperature measurement, up to 1073K, in order to clarify the all directional elastic moduli. The technique was applied to heat resistant coating, CoNiCrAlY, and thermal barrier coating, zirconia. The elastic moduli in the directions of out-plane and in-plane of the coatings were evaluated. It was found that the anisotropy of elasticity was able to be controlled by spraying powder size and thermal treatment.