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

DE200241868

Publication Date	2001
Personal Author	Pastila, P.; Nikkilae, A. P.; Maentylae, T.; Ellington, W.; Koehl, E. R.
Page Count	12
Abstract	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.
Keywords	Nondestructive tests Filters Hot gas cleanup Composite materials Ceramic materials Silicon carbides Ultrasonic tests Porosity Microstructure Density ratio
Source Agency	Technical Information Center Oak Ridge Tennessee
Corporate Authors	Argonne National Lab., IL.; Department of Energy, Washington, DC. Office of Fossil Energy.; Tampere Univ. of Technology (Finland). Inst. of Materials Science.
Supplemental Notes	Prepared in cooperation with Tampere Univ. of Technology (Finland). Inst. of Materials Science. Sponsored by Department of Energy, Washington, DC. Office of Fossil Energy.
Document Type	Technical Report
NTIS Issue Number	200218
Contract Number	DE-W-31-109-ENG-38

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

Potential of the Acousto-Ultrasound Method to Characterize the Strength of Hot Gas Filter Materials.
DE200241868

Publication Date	2001
Personal Author	Pastila, P.; Nikkilae, A. P.; Maentylae, T.; Ellington, W.; Koehl, E. R.
Page Count	12
Abstract	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.
Keywords	Nondestructive tests Filters Hot gas cleanup Composite materials Ceramic materials Silicon carbides Ultrasonic tests Porosity Microstructure Density ratio
Source Agency	Technical Information Center Oak Ridge Tennessee
Corporate Authors	Argonne National Lab., IL.; Department of Energy, Washington, DC. Office of Fossil Energy.; Tampere Univ. of Technology (Finland). Inst. of Materials Science.
Supplemental Notes	Prepared in cooperation with Tampere Univ. of Technology (Finland). Inst. of Materials Science. Sponsored by Department of Energy, Washington, DC. Office of Fossil Energy.
Document Type	Technical Report
NTIS Issue Number	200218
Contract Number	DE-W-31-109-ENG-38