APPLICATIONS OF ULTRASONIC ENERGY. TASK 2: ULTRASONIC METAL AND CERAMIC POWDER PROCESSING. TASK 3: ULTRASONIC INSTRUMENTATION. Progress Report No. 27, Covering Period from April 1, 1961 to May 31, 1961
Technical Report
·
OSTI ID:4842322
Ultrasonically activated plate molds (24 in. x 1 in. x 0.060 in.) were completely filled with cermet (Al/sub 2/O/sub 3/Stainles s Steel) slips; nonultrasonic control tests resulted in molds approximately 1/3 filled, and the specimens so prepared were hollow. Ceramic slips (Al/sub 2/O/sub 3/) completely filled the plate mold under ultrasonic activation; nonultrasonic control tests led to incomplete mold filling. A series of cylindrical specimens is being prepared using the cermet formulation to determine the effect of ultrasonic activation on the physical properties. Green densities were significantly improved by ultrasonics. Ultrasonic filling of long stainless steel tubes with arc-fused, ground, and sized ThO/sub 2/--UO/sub 2/ resulted in 9.22-g/cc (91.8% of theoretical density) compacts as compared to 8.9-g/cc (88.7% of theoretical density) obtained with conventional vibratory compaction. Ultrasonic activation of a modified ball tableting punch produced alumina pellets with green densities in excess of 82% of theoretical. No static compressional force was used, other than that of the transducer assembly. Fracture of the green pellets, "capping," during release from the punchand-die set, was virtually eliminated through ultrasonic treatment, indicative of more uniform powder flow during forming. The application of ultrasonic standing-wave-ratio instrumentation to the detection of foam level, a problem in boiling water reactors, showed adequate sensitivity. Tests are reported in both stabilized simulant foam and steamgenerated foam. The problem of measuring changes in particle size and concentration in particle/gas heat exchange loops was analyzed and an experimental program initiated. Two approaches, resonant column techniques and vibratory ribbon interaction, presently appear promising. Ultrasonic cavitation threshold detection, of use in estimating localized incipient boiling, appeared to have adequate sensitivity to be used with wire-like sensing elements. (auth)
- Research Organization:
- Aeroprojects, Inc., West Chester, Penna.
- NSA Number:
- NSA-15-029803
- OSTI ID:
- 4842322
- Report Number(s):
- NYO-9583
- Country of Publication:
- United States
- Language:
- English
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APPLICATIONS OF ULTRASONIC ENERGY. TASK 2: ULTRASONIC METAL AND CERAMIC POWDER PROCESSING. TASK 3: ULTRASONIC INSTRUMENTATION. Progress Report No. 26 Covering Period February 1, 1961 to March 31, 1961
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Fri Mar 31 23:00:00 EST 1961
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OSTI ID:4013096
APPLICATIONS OF ULTRASONIC ENERGY. TASK 2. ULTRASONIC METAL AND CERAMIC POWDER PROCESSING. TASK 3. ULTRASONIC INSTRUMENTATION. Progress Report No. 28, June 1, 1961 to July 31, 1961
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Fri Aug 18 00:00:00 EDT 1961
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OSTI ID:4804969
APPLICATIONS OF ULTRASONIC ENERGY. ULTRASONIC CASTING OF CERAMIC AND CERMET SLIPS
Technical Report
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Tue Oct 31 23:00:00 EST 1961
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OSTI ID:4809406