A Proposed Combustion Scheme for the Gaseous Oxidation Reactions of Beryllium and Aluminum

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Abstract
Starting with prior conclusions that beryllium and aluminum burn primarily by some unspecified vapor-phase mechanism, reaction schemes of two-body collisions accompanied by small heats of reaction are proposed, For beryllium, it is shown that the lowest free energy path to the liquid oxide consists of polymerization reactions as opposed to homogeneous nucleation. This is substantiated by the known existence of beryllia polymers through the hexamer. A similar scheme, employing polymers of AlO, is also proposed for aluminum although the highest known polymer reported to date is the dimer. A search for higher polymers through mass spectrometric studies is recommended.
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