Ti-Al3Ti metal-intermetallic laminate (MIL) composite with a cubic titanium trialuminide stabilized with silver: Selection of fabrication regimes, structure, and properties

Ti-Al3Ti metal-intermetallic laminate (MIL) composite with a cubic titanium trialuminide stabilized with silver: Selection of fabrication regimes, structure, and properties Full article

Journal

Journal of Alloys and Compounds
ISSN: 0925-8388

Output data

Year: 2022, Volume: 916, Article number : 165480, Pages count : 9 DOI: 10.1016/j.jallcom.2022.165480

Tags

Composite materials; Intermetallics; Mechanical properties; Phase transitions; Synchrotron radiation; X-ray diffraction

Authors

Lazurenko D.V. ¹ , Petrov I.Yu. ² , Mali V.I. ³ , Esikov M.A. ^1,3 , Kuzmin R.I. ¹ , Lozanov V.V. ⁴ , Pyczak F. ⁵ , Stark A. ⁵ , Dovzhenko G.D. ^5,6 , Bataev I.A. ¹ , Terentiev D.S. ¹ , Ruktuev A.A. ¹

Affiliations

1	Novosibirsk State Technical University
2	Novosibirsk State University
3	Lavrentyev Institute of Hydrodynamics
4	Institute of Solid State Chemistry and Mechanochemistry of SB RAS
5	Helmholtz-Zentrum Hereon
6	Boreskov Institute of Catalysis SB RAS

Ti-Al3Ti metal-intermetallic laminate (MIL) composites are known as promising structural materials due to the unique combination of their specific properties. However, their application is still limited due to the extremely high brittleness of the Al3Ti phase. In this study, we attempt to address this issue by changing the D022 crystal structure of Al3Ti to the more ductile L12 structure by alloying it with silver. To select the best fabrication regimes of Ti-Ti(Al1−xAgx)3 composites, in situ synchrotron X-ray diffraction analysis was performed to reveal the chemical reactions occurring upon heating the Ti-Al-Ag sample. The analysis showed that the highest amount of Ti(Al1−xAgx)3 phase with the L12 structure appears at 930 °C. This temperature was chosen for subsequent spark plasma sintering experiments. Scanning electron microscopy, energy dispersive X-ray analysis, and X-ray diffraction analysis revealed that the sintered sample consisted mainly of Ti, Ti(Al1−xAgx)3, and a minor fraction of the Ag-Al compound distributed in the central parts of the intermetallic layers and at the grain boundaries. Modification of the titanium trialuminide crystal structure positively affected the properties of the composite, providing a 60% increase in fracture toughness. The Ag-Al phase also contributed to toughening, causing an additional crack deflection effect.

Lazurenko D.V. , Petrov I.Y. , Mali V.I. , Esikov M.A. , Kuzmin R.I. , Lozanov V.V. , Pyczak F. , Stark A. , Dovzhenko G.D. , Bataev I.A. , Terentiev D.S. , Ruktuev A.A.
Ti-Al3Ti metal-intermetallic laminate (MIL) composite with a cubic titanium trialuminide stabilized with silver: Selection of fabrication regimes, structure, and properties
Journal of Alloys and Compounds. 2022. V.916. 165480 :1-9. DOI: 10.1016/j.jallcom.2022.165480 WOS Scopus РИНЦ OpenAlex

Web of science:	WOS:000807105100002
Scopus:	2-s2.0-85134538002
Elibrary:	54487895
OpenAlex:	W4280591147

DB	Citing
Scopus	13
OpenAlex	15
Web of science	11