Investigation Of Sinterable Oxide Powders And Ceramics Made From Them

Item

Title
Investigation Of Sinterable Oxide Powders And Ceramics Made From Them
Date
1961
Index Abstract
DTIC
Photo Quality
Complete
Report Number
WADD TR 61-262
Creator
Hyde, C.
Duckworth, W. H.
Corporate Author
Battelle Memorial Institute
Laboratory
Materials Central
Extent
20
Identifier
AD0266735
AD0266735
Access Rights
OTS
Distribution Classification
1
Contract
AF 33(616)-6238
DoD Project
7371
DoD Task
73710
DTIC Record Exists
Yes
Distribution Change Authority Correspondence
None
Report Availability
Full text available
Date Issued
1961-06
Abstract
A study was made of the strength of nonporous monophase ceramics as a function of their microstructure, and with the basic nature of sinterable powders. Sinterable powders provide a convenient way to study a wide variety of microstructural effects without introducing variations in density or purity. MgO powders, prepared by calcining a high-purity basic MgCO3, were studied as representative examples. The temperature of calcination of the carbonate had a critical effect on the density in sintered compacts of the oxide. The density of compacts of each calcine increased during sintering until a ceiling density was reached after which grain growth occurred without further densification. Ceiling densities of 97 to 98% of theoretical were attained. Sintering in various atmospheres or for extended periods did not affect the attainable density, but sintering in a moisture-free atmosphere reduced the temperature at which the ceiling density was reached. Indications were that sintering atmosphere affected grain growth. The work demonstrated the importance of controlling processing variables to assure uniformly reproducible specimens for strength measurements.
Publisher
Wright-Patterson Air Force Base, OH : Aeronautical Systems Division, Air Force Systems Command, United States Air Force
Distribution Conflict
No
Provenance
Lockheed Martin Missiles & Fire Control
Type
report
Format
1 online resource
Media
WADDTR61-262.pdf