The Stability of Al11Sm3 (Al4Sm) Phases in the Al-Sm Binary SystemMetallurgical and Materials Transactions A
AbstractThe relative stability of Al11Sm3 (Al4Sm) intermetallic phases was experimentally investigated through a series of heat treatments followed by microstructural, microchemical, and X-ray diffraction (XRD) analyses. The principal findings are that the high-temperature tetragonal phase is stable from 1655 to 1333 K and that the low-temperature orthorhombic phases, α and γ, have no range of full stability but are metastable with respect to the crystalline Al and Sm reference states down to 0 K. Thermodynamic modeling is used to describe the relative energetics of stable and metastable phases along with the associated two-phase mixtures. Issues regarding transition energetics and kinetics are discussed.
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Citation InformationShihuai Zhou and Ralph E. Napolitano. "The Stability of Al11Sm3 (Al4Sm) Phases in the Al-Sm Binary System" Metallurgical and Materials Transactions A Vol. 38 Iss. 6 (2007) p. 1145 - 1151
Available at: http://works.bepress.com/ralph_napolitano/14/