Accession Number:

AD0292061

Title:

RELATION OF PROPERTIES TO STRUCTURE IN SINTERED ALUMINUM POWDER

Descriptive Note:

Corporate Author:

STANFORD UNIV CALIF

Report Date:

1962-10-15

Pagination or Media Count:

1.0

Abstract:

The mechanical, textural and thermal expansion properties of sintered Al powder containing 7 and 14 alumina were studied extensively in the temperature range 550 to 800 C. The experimental observations, together with the results of other investigations, suggest that commercial SAP in the extruded form is a fine grained material containing a continuous alumina network interpenetrating an aluminum matrix. The alumina network appears to consist of a honeycomb of elongated cells with porous walls. In addition, the material contains discrete particles of alumina. The strength and plastic flow characteristics of SAP above 550 C and up to at least 735 C is believed to be controlled primarily by the presence of the continuous alumina network. It is possible, however, that below 550 C the alumina network may play a less important role and the high strength of SAP may be derived from its fine stable grain size and to the close spacing of the alumina particles. Author

Subject Categories:

Distribution Statement:

APPROVED FOR PUBLIC RELEASE