Accession Number : AD0694417

Title :   INVESTIGATION OF Al-Be ALLOYS WITH Y, La AND Ce ADDITIVES UP TO 33.3 AT. %,

Corporate Author : ARMY FOREIGN SCIENCE AND TECHNOLOGY CENTER WASHINGTON D C

Personal Author(s) : Zarechnyuk,O. S. ; Vivchar,O. I. ; Frankevich,D. P.

Report Date : 09 SEP 1969

Pagination or Media Count : 9

Abstract : Various properties of Y-Be-Al, La-Be-Al, and Ce-Be-Al systems were compared. In the region of 0.33.3 at.% REM content, all three form single ternary compounds: D-phase in La-Be-Al and Ce-Be-Al and D'-phase in the Y-Be-Al system. They differ in that in the Yttrium and Lanthanum systems the compounds (phase D or D') is in equilibrium with Aluminum, and in the Cerium system it is not. The ternary compound which forms in the Y-Be-Al systems is not isostructural with the compounds of La and Ce and contains more Aluminum than they do. It is concluded that the Y-Be-Al and La-Be-Al systems resemble each other and differ from the Ce-Be-Al system in the character of the phase equilibrium, whereas the La-Be-Al and Ce-Be-Al compounds are more closely related in the type of crystalline structure which forms. (Author)

Descriptors :   (*ALUMINUM ALLOYS, PHASE STUDIES), BERYLLIUM ALLOYS, CERIUM ALLOYS, YTTRIUM COMPOUNDS, LANTHANUM COMPOUNDS, INTERMETALLIC COMPOUNDS, USSR

Subject Categories : Properties of Metals and Alloys

Distribution Statement : APPROVED FOR PUBLIC RELEASE