Dynamics of Structure Formation Processes in Mechanically Activated Powder Mixture TI+AL under Conditions of Continuous Heating. High Temperature Stage | Sciact - CRIS-system of Boreskov Institute of Catalysis

Dynamics of Structure Formation Processes in Mechanically Activated Powder Mixture TI+AL under Conditions of Continuous Heating. High Temperature Stage Full article

Journal

Materials Chemistry and Physics
ISSN: 0254-0584 , E-ISSN: 1879-3312

Output data

Year: 2020, Volume: 243, Article number : 122611, Pages count : 9 DOI: 10.1016/j.matchemphys.2019.122611

Tags

Mechanical activation; Microwave heating; Thermal explosion; High-temperature annealing; Structural relaxation

Authors

Filimonov V.Yu ^1,2 , Loginova M.V. ¹ , Ivanov S.G. ¹ , Sitnikov A.A. ¹ , Yakovlev V.I. ¹ , Sobachkin A.V. ¹ , Negodyaev A.Z. ¹ , Myasnikov A.Y.U. ¹ , Tolochko B.P. ³ , Sharafutdinov M.R. ³

Affiliations

1	Altai State Technical University, 656038, Altai region, Barnaul, Lenina avenue, 46, Russian Federation
2	Institute for Water and Environment Problems, Siberian Branch of the Russian Academy of Sciences
3	Institute of Solid State Chemistry and Mechanochemistry, Siberian Branch of the Russian Academy of Sciences

With the use of time-resolved X-Ray diffraction, the analysis of the phase formation dynamics processes in mechanically activated powder mixture of Ti + Al composition in the thermal explosion mode was carried out. The synthesis was conducted under conditions of heating by an external source of constant power. It was found that at the stage of low-temperature heating (preheating stage), a significant amount of reaction products (intermetallic phases) is formed. A possible reason for this is the presence of disordered transition zones that form at the interface between the reactants in the process of preliminary mechanical activation. However, in the process of nonequilibrium synthesis (thermal explosion), the formation of the only compound γ -TiAl occurs. It was established that the structural changes continue after completion of the chemical reaction. At the first stage of high-temperature annealing, the processes of structural relaxation (which are not accompanied by the appearance of new compounds) are realized. At the second stage, the processes of transition to a thermodynamically equilibrium state occur. It was shown that the forced cooling of the system at various stages of the synthesis can be a way of controlling the structure, composition and, as a consequence, properties of the synthesis product.

Filimonov V.Y. , Loginova M.V. , Ivanov S.G. , Sitnikov A.A. , Yakovlev V.I. , Sobachkin A.V. , Negodyaev A.Z. , Myasnikov A.Y.U. , Tolochko B.P. , Sharafutdinov M.R.
Dynamics of Structure Formation Processes in Mechanically Activated Powder Mixture TI+AL under Conditions of Continuous Heating. High Temperature Stage
Materials Chemistry and Physics. 2020. V.243. 122611 :1-9. DOI: 10.1016/j.matchemphys.2019.122611 WOS Scopus РИНЦ ANCAN OpenAlex

Submitted:	Oct 16, 2019
Accepted:	Dec 31, 2019
Published online:	Jan 2, 2020
Published print:	Mar 1, 2020

Web of science:	WOS:000523631300059
Scopus:	2-s2.0-85077798104
Elibrary:	43241432
Chemical Abstracts:	2020:127749
Chemical Abstracts (print):	172:245665
OpenAlex:	W2998283719

DB	Citing
Web of science	12
Scopus	14
OpenAlex	12