Investigation of the titanium–indium system

• Published in: Journal of alloys and compounds 2003-10, Vol.360 (1), p.137-142
• Main Authors: Gulay, L.D, Schuster, J.C
• Format: Article
• Language: English
• Subjects: Cross-disciplinary physics: materials science; rheology; Crystal structure; Exact sciences and technology; Materials science; Phase diagram; Phase diagrams and microstructures developed by solidification and solid-solid phase transformations; Phase diagrams of metals and alloys; Physics; Thermal analysis; Ti–In alloys; X-Ray diffraction
• ISSN: 0925-8388; 1873-4669
• DOI: 10.1016/S0925-8388(03)00319-0

The phase diagram of the Ti–In system was determined using DTA, XRD and EDX analyses. The existence of the phases Ti 2In 5 [Mn 2Hg 5 type structure, space group P4/ mbm, a=0.99995(3), c=0.29960(2) nm] and Ti 3In [Ni 3Sn type structure, space group P6 3/ mmc, a=0.5978(1), c=0.4812(1) nm] was confirmed. The phase previously labeled Ti 3In 2 was found to exist in a narrow homogeneity region near Ti 56In 44. Rietveld refinement of the XRD powder pattern yielded solutions compatible with a Cu 3Au-type or a BiIn-type crystal structure, but not with a CuAu-type crystal structure. Furthermore, at 38.5 at.% In, a new phase was observed having a γ-brass related crystal structure [Ti 8In 5, space group P 4 ̄ 3m , a=0.99578(6) nm]. The intermetallic phases were formed by a cascade of peritectic reactions ending in a eutectic at >99 at.% indium between Ti 2In 5 and (In) at 0.4 K below the melting temperature of pure indium.