Al-Ge-Ti: Phase equilibria and structural characterization of new ternary compounds
- Author(s)
- Roland W. Bittner, Matthias Gürth, Liliana I. Duarte, Christian Leinenbach, Herta S. Effenberger, Klaus W. Richter
- Abstract
Phase equil. of Al-?Ge-?Ti have been investigated using SEM (SEM)?, powder X-?ray diffraction (XRD) and DTA (DTA)?. Partial isothermal sections at 400 °C, 520 °C and 1000 °C were obtained with focus on the titanium-?poor part up to 50 at.?% titanium. Three ternary compds. were found to exist. The compd. Al3GeTi (t1) crystallizes in an own structure type (P4?/nmm, tP10)?. Two structurally closely related compds. were found at the compn. Al1-?xGe1+xTi: t2 (0.61 = x = 0.73)?, Al4Si5Zr3-?type, I41/amd, tI24 and t'2 (0.36 = x = 0.57)?, Si2Zr-?type, Cmcm, oC12. DTA data were used to construct a ternary reaction scheme (Scheil diagram) up to approx. 1300 °C, a partial liquidus projection and two vertical sections, at 10 at.?% Ti and at a const. Al:Ti ratio of 1:1. A total no. of 12 ternary invariant reactions were identified.
- Organisation(s)
- Department of Functional Materials and Catalysis, Department of Mineralogy and Crystallography, Core Facility Crystal Structure Analysis
- External organisation(s)
- Eidgenössische Materialprüfungs- und Forschungsanstalt
- Journal
- Intermetallics
- Volume
- 53
- Pages
- 157-168
- No. of pages
- 12
- ISSN
- 0966-9795
- DOI
- https://doi.org/10.1016/j.intermet.2014.05.003
- Publication date
- 05-2014
- Peer reviewed
- Yes
- Austrian Fields of Science 2012
- 104011 Materials chemistry, 104003 Inorganic chemistry, 105113 Crystallography
- Keywords
- ASJC Scopus subject areas
- Mechanical Engineering, Mechanics of Materials, Materials Chemistry, Metals and Alloys, General Chemistry
- Portal url
- https://ucrisportal.univie.ac.at/en/publications/ed63c8d4-d040-4ab1-86d2-ff1a8c7f001e