NDLI: Nde for heat engine ceramics

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Nde for heat engine ceramics

Content Provider	NASA Technical Reports Server (NTRS)
Author	Klima, S. J.
Copyright Year	1984
Description	Radiographic, ultrasonic, and scanning laser acoustic microscopy (SLAM) techniques were used to characterize silicon nitride and silicon carbide MOR bars in various stages of fabrication. Conventional and microfocus x-ray techniques were found capable of detecting minute high density inclusions in as-received powders, green compacts, and fully densified specimens. Significant density gradients in sintered bars were observed by radiography, ultrasonic velocity, and SLAM. Ultrasonic attenuation was found sensitive to microstructural variations due to grain and void morphology and distribution. SLAM was also capable of detecting voids, inclusions, and cracks in finished test bars. It was determined that thermoacoustic microscopy techniques have promise for application to green and densified ceramics.
File Size	5903383
Page Count	13
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_19850012079
Archival Resource Key	ark:/13960/t73v4dp4n
Language	English
Publisher Date	1984-01-01
Access Restriction	Open
Subject Keyword	X Ray Inspection Nondestructive Tests Fracture Mechanics Silicon Carbides Ceramics Radiography Ultrasonic Tests Lasers Sintering Internal Combustion Engines Acoustic Microscopes Silicon Nitrides Reliability Microstructure Bars Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science
Content Type	Text
Resource Type	Article

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