Accession Number : AD0695864

Title :   CONSTITUTION OF MAGNESIUM-INDIUM ALLOYS CONTAINING 23-100 ATOMIC % INDIUM,

Corporate Author : NATIONAL RESEARCH COUNCIL OF CANADA OTTAWA (ONTARIO) DIV OF APPLIED CHEMISTRY

Personal Author(s) : Pickwick,K. M. ; Alexander,W. A. ; Gamble,R. H.

Report Date : 03 FEB 1969

Pagination or Media Count : 12

Abstract : A constitutional diagram for magnesium-indium alloys containing between 23.2 and 100 atomic % indium has been established using differential thermal analysis, electrical resistivity, and metallographic methods. An intermediate solid solution, beta, with a wide range of homogeneity, is formed peritectically from the liquid and alpha, the magnesium primary solid solution. It extends between 23 atomic % indium at 485.3C and 86 atomic % indium at 160.2C, where it is in equilibrium with gamma, the indium primary solid solution. Magnesium has a limited solid solubility in indium of about 6 atomic %. For alloys containing up to 50 atomic % indium, the derived constitutional diagram is in good agreement with that of a previous investigation. Two exceptions were noted: first, there is no evidence of a long period superlattice, beta''' of the CuAu II type, and second, a reaction is observed involving a transition between the two ordered phases beta' and beta''. For the indium-rich alloys no intermediate or ordered phase formation is observed. The results have been discussed in terms of the existing phase diagrams. (Author)

Descriptors :   (*MAGNESIUM ALLOYS, *PHASE DIAGRAMS), (*INDIUM ALLOYS, *PHASE STUDIES), MICROSTRUCTURE, SOLID SOLUTIONS, METALLOGRAPHY, CANADA

Subject Categories : Properties of Metals and Alloys

Distribution Statement : APPROVED FOR PUBLIC RELEASE