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Ceramic-Reinforced γ-TiAl-Based Composites: Synthesis, Structure, and Properties Full article

Journal Materials
ISSN: 1996-1944
Output data Year: 2019, Volume: 12, Number: 4, Article number : 629, Pages count : 20 DOI: 10.3390/ma12040629
Tags Composite materials; Intermetallics; Microstructure; Phase transitions; Sintering; Synchrotron radiation
Authors Lazurenko Daria 1 , Stark Andreas 3 , Esikov Maksim 1,2 , Paul Jonathan 3 , Bataev Ivan 1 , Kashimbetova Adelya 1 , Mali Vyacheslav 2 , Lorenz Uwe 3 , Pyczak Florian 3
Affiliations
1 Novosibirsk State Technical University
2 Lavrentiev Institute of Hydrodinamics
3 Helmholtz Zentrum Geesthacht

Abstract: In this study, new multilayer TiAl-based composites were developed and characterized. The materials were produced by spark plasma sintering (SPS) of elemental Ti and Al foils and ceramic particles (TiB 2 and TiC) at 1250 °C. The matrix of the composites consisted of α 2 -TiAl and γ-TiAl lamellas and reinforcing ceramic layers. Formation of the α 2 + γ structure, which occurred via a number of solid-liquid and solid-solid reactions and intermediate phases, was characterized by in situ synchrotron X-ray diffraction analysis. The combination of X-ray diffraction (XRD), transmission electron microscopy (TEM), scanning electron microscopy (SEM), and energy dispersive X-ray (EDX) analysis revealed that an interaction of TiC with Ti and Al led to the formation of a Ti 2 AlC M n+1 AX n (MAX) phase. No chemical reactions between TiB 2 and the matrix elements were observed. The microhardness, compressive strength, and creep behavior of the composites were measured to estimate their mechanical properties. The orientation of the layers with respect to the direction of the load affected the compressive strength and creep behavior of TiC-reinforced composites. The compressive strength of samples loaded in the perpendicular direction to layers was higher; however, the creep resistance was better for composites loaded in the longitudinal direction. The microhardness of the composites correlated with the microhardness of reinforcing components.
Cite: Lazurenko D. , Stark A. , Esikov M. , Paul J. , Bataev I. , Kashimbetova A. , Mali V. , Lorenz U. , Pyczak F.
Ceramic-Reinforced γ-TiAl-Based Composites: Synthesis, Structure, and Properties
Materials. 2019. V.12. N4. 629 :1-20. DOI: 10.3390/ma12040629 WOS Scopus РИНЦ OpenAlex
Dates:
Submitted: Jan 31, 2019
Accepted: Feb 18, 2019
Published print: Feb 20, 2019
Identifiers:
Web of science: WOS:000460793300079
Scopus: 2-s2.0-85062214334
Elibrary: 38694058
OpenAlex: W2917606722
Citing:
DB Citing
Scopus 13
OpenAlex 12
Elibrary 12
Web of science 10
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