Combustion of bulk titanium in oxygenThe combustion of bulk titanium in one atmosphere oxygen is studied using laser ignition and several analytical techniques. These were high-speed color cinematography, time and space resolved spectra in the visible region, metallography (including SEM) of specimens quenched in argon gas, X-ray and chemical product analyses, and a new optical technique, the Hilbert transform method. The cinematographic application of this technique for visualizing phase objects in the combustion zone is described. The results indicate an initial vapor phase reaction immediately adjacent to the molten surface but as the oxygen uptake progresses the evaporation approaches the point of congruency and a much reduced evaporation rate. This and the accumulation of the various soluble oxides soon drive the reaction zone below the surface where gas formation causes boiling and ejection of particles. The buildup of rutile cuts off the oxygen supply and the reaction ceases.
Document ID
19750056725
Acquisition Source
Legacy CDMS
Document Type
Conference Proceedings
Authors
Clark, A. F.
Moulder, J. C.
Runyan, C. C. (National Bureau of Standards, Institute for Basic Standards, Boulder Colo., United States)