The goal of the Contrails project is to help preserve and disseminate the technical record of 20th century aerospace research, highlighting in particular the research endeavors of the Illinois Tech community.

Investigation Of Sinterable Oxide Powders And Ceramics Made From Them

Report Number: WADD TR 61-262
Author: Hyde, C.
Author: Duckworth, W. H.
Corporate Author: Battelle Memorial Institute
Laboratory: Materials Central
Date of Publication: 1961-06
Pages: 20
Contract: AF 33(616)-6238
Project: 7371
Task: 73710
AD Number: AD0266735

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.

Lockheed Martin Missiles & Fire Control
Download this report

(PDF, 0.77 MB, 20 pages)

Other options for obtaining this report

Via the Defense Technical Information Center (DTIC):
A record for this report, and possibly a full-image download of the report, exists at DTIC

Via National Technical Information Service:
This report may have been digitized and made freely available for public download, or made publicly available for purchase by the National Technical Information Service through their online database, the National Technical Reports Library

Indications of Public Availability
No digital image of an index entry indicating public availability is currently available
The inside cover of this report indicates that it was released for public sale