caa a22 4500 47581097X CHVBK 20180406123759.0 cr unu---uuuuu 170329e20000301xx s 000 0 eng 10.1007/BF02699359 doi (NATIONALLICENCE)springer-10.1007/BF02699359 Macrokinetics of thermal explosion in a niobium—aluminum system. I. Basic macrokinetic stages [Elektronische Daten] [E. Pis'menskaya, A. Rogachev, S. Bakhtamov, N. Sachkova] The basic macrokinetic stages of a gas-free thermal explosion in an Nb-Al system with different stoichiometric ratios of the reagents are determined using scanning differential calorimetry, electron metallography, and microanalysis. Chemical interaction begins when aluminum melts (993 K) and proceeds slowly up to a temperature of 1020-1040 K, at which dramatic self-heating and acceleration of the reaction (thermal explosion) occur. Migration of the melt from the center of the sample to the surface layers and growth of droplets on the sample surface are observed at the stage of slow reaction, and the drops penetrate again into the sample at the stage of thermal explosion. The phases NbAl3 and Nb2Al are formed in the thermal explosion regardless of the initial stoichiometry of the composition; the differences are manifested only in the ratio of these phases and in the amount of residual (nonreacted) niobium. Kluwer Academic/Plenum Publishers, 2000 Pis'menskaya E. Institute of Structural Macrokinetics and Material Science Problems, Russian Academy of Sciences, 142432, Chernogolovka aut Rogachev A. Institute of Structural Macrokinetics and Material Science Problems, Russian Academy of Sciences, 142432, Chernogolovka aut Bakhtamov S. Institute of Structural Macrokinetics and Material Science Problems, Russian Academy of Sciences, 142432, Chernogolovka aut Sachkova N. Institute of Structural Macrokinetics and Material Science Problems, Russian Academy of Sciences, 142432, Chernogolovka aut Combustion, Explosion and Shock Waves Springer US 36/2(2000-03-01), 193-197 0010-5082 36:2<193 2000 36 10573 https://doi.org/10.1007/BF02699359 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF02699359 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Pis'menskaya E. Institute of Structural Macrokinetics and Material Science Problems, Russian Academy of Sciences, 142432, Chernogolovka aut NATIONALLICENCE 700 1- Rogachev A. Institute of Structural Macrokinetics and Material Science Problems, Russian Academy of Sciences, 142432, Chernogolovka aut NATIONALLICENCE 700 1- Bakhtamov S. Institute of Structural Macrokinetics and Material Science Problems, Russian Academy of Sciences, 142432, Chernogolovka aut NATIONALLICENCE 700 1- Sachkova N. Institute of Structural Macrokinetics and Material Science Problems, Russian Academy of Sciences, 142432, Chernogolovka aut NATIONALLICENCE 773 0- Combustion, Explosion and Shock Waves Springer US 36/2(2000-03-01), 193-197 0010-5082 36:2<193 2000 36 10573 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer