Effect of Initial Temperature and Mechanical Activation on Synthesis in a Ti + Al System

Synthesis is carried out in a Ti + Al mixture prepared by two methods, namely preliminary mechanical activation (MA) or preheating. Synthesis occurs in the cases of layer-by-layer combustion (SHS) and thermal explosion. The dependences of burning rates of activated Ti + Al mixtures on the MA duratio...

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Bibliographic Details
Published in:Combustion, explosion, and shock waves explosion, and shock waves, 2020-06, Vol.56 (3), p.308-316
Main Authors: Kochetov, N. A., Seplyarskii, B. S.
Format: Article
Language:English
Subjects:
Activation
Aluminum
Burning rate
Classical and Continuum Physics
Classical Mechanics
Combustion
Control
Dynamical Systems
Elongation
Engineering
Heating
Phase composition
Physical Chemistry
Physics
Physics and Astronomy
Synthesis
Temperature
Titanium aluminides
Vibration
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Summary:Synthesis is carried out in a Ti + Al mixture prepared by two methods, namely preliminary mechanical activation (MA) or preheating. Synthesis occurs in the cases of layer-by-layer combustion (SHS) and thermal explosion. The dependences of burning rates of activated Ti + Al mixtures on the MA duration are investigated. The relationships between the initial temperature and the rates and maximum combustion temperatures of initial mixtures along with the elongation of samples after combustion are determined. The phase composition of the initial mixtures after activation and of the synthesis products is described. The MA duration (12 min) at which the burning rate of the mixture is maximum is experimentally determined. For this mixture (12-min long MA), the dependence of the burning rates and maximum combustion temperatures along with the elongation of samples after combustion on the initial temperature is studied. Synthesis at which the content of the main phases (TiAl and Ti 3 Al) in the products is maximized is established.
ISSN:0010-5082
1573-8345
DOI:10.1134/S0010508220030077