Potential of the Acousto-Ultrasound Method to Characterize the Strength of Hot Gas Filter Materials.

Pastila, P. ; Nikkilae, A. P. ; Maentylae, T. ; Ellington, W. ; Koehl, E. R.

Technical Information Center Oak Ridge Tennessee

关键词: Nondestructive tests;    Filters;    Hot gas cleanup;    Composite materials;    Ceramic materials;   

RP-ID  :  DE200241868

学科分类：工程和技术（综合）

美国|英语

来源: National Technical Reports Library

【 摘 要 】

The objective of this work was to assess the potential of acousto-ultrasonic nondestructive evaluation for characterizing the strength of hot gas filter materials based on clay-bonded SiC and alumina/mullite. Samples were exposed to high-temperature in air and air/water vapor environments, the stress wave factor (SWF) was determined by the acousto-ultrasound method, and the hoop strength was obtained by internal burst testing. The samples were further analyzed microstructurally using electron microscopy and x-ray diffraction. Density and porosity were obtained using the Archimedes method. A correlation of hoop strength with averaged SWF was found. The variation in SWF and strength along the samples is discussed in terms of their relationship to density and porosity.