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Reaction heat potential utilization in mullite and spinel based ceramics synthesis and sintering

Karhu M., Lagerbom J., Kivikytö-Reponen P., Lindroos T., Laitinen T.

Mechanik

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2016

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R. 89, nr 5-6

520--521

EN

Present work studies the potential of the utilization of the heat released from exothermic reactions in ceramic synthesis and sintering. For example the initialization of the endothermic reaction of the mullite formation is studied with heat releasing coreactions. Exothermically reactive raw material (aluminium powder) is examined for external energy saving ceramic synthesis.

PL

Przeanalizowano możliwości wykorzystania ciepła pochodzącego z reakcji egzotermicznej podczas syntezy i spiekania materiałów ceramicznych. Przykładowo zainicjowanie reakcji endotermicznej podczas formowania się mullitu analizowano wraz z ciepłem uwalnianym w reakcjach towarzyszących. Surowy materiał reaktywny egzotermicznie (proszek aluminiowy) poddano badaniom w celu obniżenia energii zewnętrznej niezbędnej podczas syntezy ceramiki.

2

Zmiany entalpii samorozwijającej się reakcji egzotermicznej w procesie spiekania proszków żelaza i aluminium

Jóźwiak S., Karczewski K., Bojar Z., Zarański Z.

Inżynieria Materiałowa

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2006

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Vol. 27, nr 3

605-608

PL

W pracy omówiono wpływ parametrów prasowania na zimno na intensywność reakcji SHS w procesie wytwarzania intermetalicznych spieków na bazie fazy FeAl. Przedstawiono korelacje pomiędzy zmianami wzajemnego udziału proszków elementarnych, wykorzystanych jako materiał wsadowy, a charakterystycznymi temperaturami reakcji syntezy.

EN

The influence of cold pressing parameters on the intensity of SHS reaction in the sintering process of FeAl based materials was presented in this paper. The correlation between changes of elementary powders mutual participation, used as charge, and the characteristic temperatures of SHS reaction are shown below.

3

Aviation related, nonliquid petroleum fueled, exothermic reactions

Kauffman C.

Research Bulletin / Warsaw University of Technology, Institute of Aeronautics and Applied Mechanics

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1999

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nr 9

41-45

EN

The usual concept of an aviation fire for vehicles on the ground is that of a large pool fire, or for a in flight, that of an atomized mist finding region sheltered from the high velocity in which to burn. Both situations result the failure of fuel storage and delivery system to the liquid hydrocarbon fuel. However, hydrocarbons are not the only fuel on board the aircraft. There are fuel vapors, passengers and furnishings, equipment, and structure. air may not be the only oxidizer in proximity to these fuels. And. additionally it is to have a wide variety of ignition sources the exothermic chemical reaction. an awareness of the lethality of these has not been seriously addressed by the community, although there have been nunerous previous incidents. The possibility for the occurrence of life threatening exothermic reactions on flight vehicles is illustrated by the presentation of these findings from numerous previous investigations which show how the required components were unexpectedly able to come together and produce damaging consequences. These incidents clearly show that the traditional views of fuel. oxidizer. and ignition source must be considerably broadened and the usual methods of testing, amelioration, confinement, and extinguishment must be examined. Inflight fires and explosions are a very serious cause for concern. And. additionally, it must be recognized that those involved with aviation fire safety must from time to time be concerned with structures which support the operation of aircraft.