Фазовая диаграмма системы Ir-Th

К оглавлению: Другие диаграммы (Others phase diargams)


Ir-Th (Iridium-Thorium) H. Okamoto The assessed Ir-Th phase diagram is composed from the diagrams proposed by [ 79Kle] for the composition range 0 to 33.3 at.% Th (based on thermal analysis) and by [64Tho] for the composition range 33.3 to 100 at.% Th (based on metallographic and X-ray investigations). The equilibrium phases are (1) the liquid, L; (2) the fcc terminal solid solution, (Ir); (3) hexagonal CaCu5-type Ir5Th; (4) Ir3Th; (5) cubic Cu2Mg-type Ir2Th; (6) orthorhombic CrB-type IrTh; ( 7) IrThx, at about 60 at.% Th; (8) hexagonal Fe3Th7-type Ir3Th7; (9) the bcc terminal solid solution, (bTh); and (10) the fcc terminal solid solution, (aTh) . The solubility of Th in (Ir) is unknown. The solubility of Ir in (aTh) is less than 1 at.% at 1000 C, according to hardness and lattice parameter data [ 64Tho]. 64Tho: J.R. Thomson, J. Less-Common Met., 6(1), 3-10 (1964). 79Kle: H. Kleykamp, J. Less-Common Met., 63(1), P25-P33 (1979) in German. Submitted to the APD Program. Complete evaluation contains 1 figure, 3 tables, and 11 references. Special Points of the Ir-Th System