Constitution of alloys and phase diagram of the Al–Ti–Rh system. III. Solidus surface of the Ti–TiRh–AlRh–Al partial system

• Published in: Powder metallurgy and metal ceramics 2012, Vol.50 (9-10), p.641-654
• Main Authors: Kornienko, K. E., Khoruzha, V. G., Vereshchaka, V. M.
• Format: Article
• Language: English
• Subjects: Alloys; Aluminum; Analysis; Ceramics; Characterization and Evaluation of Materials; Chemistry and Materials Science; Composites; Diffraction; Electron probes; Glass; Invariants; Materials Science; Metallic Materials; Natural Materials; Physicochemical Materials Research; Powder metallurgy; Solid solutions; Solidus; Systems (metallurgical); Titanium; X-rays
• ISSN: 1068-1302; 1573-9066
• DOI: 10.1007/s11106-012-9370-0

The data obtained by metallography, x-ray diffraction, electron microprobe and differential thermal analyses as well as by Pirani–Alterthum incipient melting technique are used to construct the solidus surface projection of the Ti–TiRh–AlRh–Al partial system onto the composition triangle for the first time. The participation of two ternary compounds (τ 1 , Al 67 Ti 27 Rh 6 , with AuCu 3 -type structure, and τ 2 , Al 49.6 Ti 27.1 Rh 23.3 , with Th 6 Mn 23+1 -type structure) in phase equilibria is confirmed. Thirteen single-phase surfaces corresponding to solid solutions based on components and to the phases based on binary and ternary compounds are found on the solidus surface. This surface also contains 25 ruled surfaces bounding two-phase volumes as well as 13 isothermal planes that are constituents of invariant four-phase equilibria.