ISSN:
0001-1541
Keywords:
Chemistry
;
Chemical Engineering
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
,
Process Engineering, Biotechnology, Nutrition Technology
Notes:
Dense intermetallic and ceramic (alumina based) coatings can be formed in situ during simultaneous combustion synthesis and densification in the field of centrifugal forces. Both microstructure and composition of alumina-based coatings formed during alumino-thermal reduction of oxides can be altered by an introduction of additives such as ZrSiO4, SiO2, Na2CrO4, and carbon. The activation energy and frequency factor for the Ni-Al reacting system consisting of equal atomic amounts of Ni and Al powders with an average particle size of 5 μm were measured using a nonisothermal technique, which were equal to 1.05 × 105 J/mol and 1.017 × 108 s-1, respectively. A mathematical model of in-situ densification of a single-phase combustion product (NiAl) in the field of centrifugal forces was developed and explored.
Additional Material:
15 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/aic.690431321
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